./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/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_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/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_e857f1d4-3ab6-4033-9841-51c953962d73/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 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:49:23,303 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:49:23,393 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 05:49:23,397 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:49:23,398 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:49:23,421 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:49:23,422 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:49:23,423 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:49:23,423 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:49:23,424 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:49:23,424 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:49:23,425 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:49:23,426 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:49:23,426 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:49:23,427 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:49:23,427 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:49:23,428 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:49:23,428 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:49:23,428 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:49:23,429 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:49:23,429 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 05:49:23,432 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 05:49:23,433 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 05:49:23,433 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:49:23,433 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 05:49:23,434 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 05:49:23,434 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:49:23,434 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:49:23,435 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:49:23,435 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:49:23,435 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:49:23,436 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:49:23,436 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:49:23,436 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:49:23,436 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:49:23,436 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:49:23,437 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:49:23,437 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:49:23,437 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:49:23,437 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:49:23,437 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:49:23,438 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_e857f1d4-3ab6-4033-9841-51c953962d73/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec [2023-11-29 05:49:23,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:49:23,663 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:49:23,666 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:49:23,667 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:49:23,667 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:49:23,669 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2023-11-29 05:49:26,417 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:49:26,628 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:49:26,629 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2023-11-29 05:49:26,636 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/data/3b07f7c6e/f4284afa29e34b3b88c899626f50b939/FLAG6db893fe1 [2023-11-29 05:49:26,648 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/data/3b07f7c6e/f4284afa29e34b3b88c899626f50b939 [2023-11-29 05:49:26,650 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:49:26,652 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:49:26,653 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:49:26,653 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:49:26,658 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:49:26,659 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:49:26" (1/1) ... [2023-11-29 05:49:26,660 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56cc6484 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:49:26, skipping insertion in model container [2023-11-29 05:49:26,660 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:49:26" (1/1) ... [2023-11-29 05:49:26,681 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:49:26,833 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:49:26,844 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-11-29 05:49:26,845 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@286930e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:49:26, skipping insertion in model container [2023-11-29 05:49:26,845 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:49:26,845 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-29 05:49:26,847 INFO L158 Benchmark]: Toolchain (without parser) took 194.60ms. Allocated memory is still 153.1MB. Free memory was 123.8MB in the beginning and 113.9MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 05:49:26,847 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 115.3MB. Free memory is still 76.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 05:49:26,848 INFO L158 Benchmark]: CACSL2BoogieTranslator took 192.21ms. Allocated memory is still 153.1MB. Free memory was 123.6MB in the beginning and 113.9MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 05:49:26,849 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 115.3MB. Free memory is still 76.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 192.21ms. Allocated memory is still 153.1MB. Free memory was 123.6MB in the beginning and 113.9MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 90]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/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_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/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_e857f1d4-3ab6-4033-9841-51c953962d73/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 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:49:28,622 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:49:28,699 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-29 05:49:28,706 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:49:28,706 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:49:28,735 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:49:28,736 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:49:28,736 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:49:28,737 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:49:28,738 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:49:28,738 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:49:28,739 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:49:28,740 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:49:28,740 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:49:28,741 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:49:28,741 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:49:28,742 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:49:28,742 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:49:28,743 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:49:28,744 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:49:28,744 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 05:49:28,745 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 05:49:28,745 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 05:49:28,746 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:49:28,746 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 05:49:28,747 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-29 05:49:28,747 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-29 05:49:28,747 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 05:49:28,748 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:49:28,748 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:49:28,749 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:49:28,749 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:49:28,749 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:49:28,750 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:49:28,750 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:49:28,750 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:49:28,751 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:49:28,751 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-29 05:49:28,751 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-29 05:49:28,751 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:49:28,751 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:49:28,752 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:49:28,752 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:49:28,752 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-29 05:49:28,752 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_e857f1d4-3ab6-4033-9841-51c953962d73/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec [2023-11-29 05:49:29,020 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:49:29,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:49:29,041 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:49:29,042 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:49:29,042 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:49:29,044 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2023-11-29 05:49:31,889 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:49:32,091 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:49:32,092 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2023-11-29 05:49:32,101 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/data/6097434d1/330771e32eb34bf2bf58f1405e5d4ead/FLAG468165c19 [2023-11-29 05:49:32,117 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/data/6097434d1/330771e32eb34bf2bf58f1405e5d4ead [2023-11-29 05:49:32,119 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:49:32,121 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:49:32,122 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:49:32,122 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:49:32,128 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:49:32,129 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:49:32" (1/1) ... [2023-11-29 05:49:32,130 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@af8fd22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:49:32, skipping insertion in model container [2023-11-29 05:49:32,130 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:49:32" (1/1) ... [2023-11-29 05:49:32,155 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:49:32,343 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:49:32,358 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-29 05:49:32,362 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:49:32,382 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:49:32,389 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:49:32,427 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:49:32,438 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 05:49:32,438 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 05:49:32,451 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:49:32,451 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:49:32 WrapperNode [2023-11-29 05:49:32,451 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:49:32,452 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:49:32,453 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:49:32,453 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:49:32,460 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:49:32" (1/1) ... [2023-11-29 05:49:32,473 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:49:32" (1/1) ... [2023-11-29 05:49:32,499 INFO L138 Inliner]: procedures = 28, calls = 37, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 142 [2023-11-29 05:49:32,500 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:49:32,500 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:49:32,501 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:49:32,501 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:49:32,512 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:49:32" (1/1) ... [2023-11-29 05:49:32,512 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:49:32" (1/1) ... [2023-11-29 05:49:32,517 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:49:32" (1/1) ... [2023-11-29 05:49:32,534 INFO L175 MemorySlicer]: Split 9 memory accesses to 4 slices as follows [2, 3, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-29 05:49:32,535 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:49:32" (1/1) ... [2023-11-29 05:49:32,535 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:49:32" (1/1) ... [2023-11-29 05:49:32,546 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:49:32" (1/1) ... [2023-11-29 05:49:32,549 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:49:32" (1/1) ... [2023-11-29 05:49:32,552 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:49:32" (1/1) ... [2023-11-29 05:49:32,554 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:49:32" (1/1) ... [2023-11-29 05:49:32,558 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:49:32,559 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:49:32,559 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:49:32,560 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:49:32,560 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:49:32" (1/1) ... [2023-11-29 05:49:32,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:49:32,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:49:32,594 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:49:32,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:49:32,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:49:32,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-29 05:49:32,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-29 05:49:32,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-29 05:49:32,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-29 05:49:32,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 05:49:32,639 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-29 05:49:32,639 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-29 05:49:32,639 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-29 05:49:32,639 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-29 05:49:32,639 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 05:49:32,640 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 05:49:32,640 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 05:49:32,640 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 05:49:32,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 05:49:32,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 05:49:32,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 05:49:32,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:49:32,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:49:32,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:49:32,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-29 05:49:32,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-29 05:49:32,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-29 05:49:32,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-29 05:49:32,643 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 05:49:32,769 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:49:32,772 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:49:33,205 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:49:33,495 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:49:33,495 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 05:49:33,495 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:49:33 BoogieIcfgContainer [2023-11-29 05:49:33,496 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:49:33,498 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:49:33,498 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:49:33,502 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:49:33,502 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:49:32" (1/3) ... [2023-11-29 05:49:33,503 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20b26a17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:49:33, skipping insertion in model container [2023-11-29 05:49:33,503 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:49:32" (2/3) ... [2023-11-29 05:49:33,503 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20b26a17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:49:33, skipping insertion in model container [2023-11-29 05:49:33,503 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:49:33" (3/3) ... [2023-11-29 05:49:33,505 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2023-11-29 05:49:33,525 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:49:33,525 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-11-29 05:49:33,526 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 05:49:33,586 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 05:49:33,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 46 transitions, 106 flow [2023-11-29 05:49:33,657 INFO L124 PetriNetUnfolderBase]: 3/44 cut-off events. [2023-11-29 05:49:33,658 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 05:49:33,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 44 events. 3/44 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 83 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 25. Up to 2 conditions per place. [2023-11-29 05:49:33,661 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 46 transitions, 106 flow [2023-11-29 05:49:33,666 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 43 transitions, 98 flow [2023-11-29 05:49:33,677 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:49:33,684 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;@20987e06, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:49:33,684 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-11-29 05:49:33,688 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 05:49:33,688 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-29 05:49:33,688 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 05:49:33,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:49:33,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 05:49:33,690 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 05:49:33,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:33,695 INFO L85 PathProgramCache]: Analyzing trace with hash 480204, now seen corresponding path program 1 times [2023-11-29 05:49:33,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:49:33,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780075775] [2023-11-29 05:49:33,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:33,716 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:49:33,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:49:33,718 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:49:33,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-29 05:49:33,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:33,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 05:49:33,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:33,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 05:49:33,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:33,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 05:49:33,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:33,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:49:33,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:33,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 05:49:33,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:33,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 05:49:33,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:33,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:49:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:49:33,977 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:49:33,977 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:49:33,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780075775] [2023-11-29 05:49:33,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780075775] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:49:33,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:49:33,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:49:33,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616099174] [2023-11-29 05:49:33,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:49:33,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:49:33,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:49:34,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:49:34,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:49:34,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2023-11-29 05:49:34,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:34,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:49:34,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2023-11-29 05:49:34,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:49:34,333 INFO L124 PetriNetUnfolderBase]: 128/350 cut-off events. [2023-11-29 05:49:34,333 INFO L125 PetriNetUnfolderBase]: For 29/30 co-relation queries the response was YES. [2023-11-29 05:49:34,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 598 conditions, 350 events. 128/350 cut-off events. For 29/30 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2032 event pairs, 100 based on Foata normal form. 1/214 useless extension candidates. Maximal degree in co-relation 522. Up to 221 conditions per place. [2023-11-29 05:49:34,340 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 21 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-11-29 05:49:34,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 138 flow [2023-11-29 05:49:34,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:49:34,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:49:34,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2023-11-29 05:49:34,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6159420289855072 [2023-11-29 05:49:34,351 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 85 transitions. [2023-11-29 05:49:34,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 85 transitions. [2023-11-29 05:49:34,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:49:34,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 85 transitions. [2023-11-29 05:49:34,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:34,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:34,360 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:34,362 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 98 flow. Second operand 3 states and 85 transitions. [2023-11-29 05:49:34,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 40 transitions, 138 flow [2023-11-29 05:49:34,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 130 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 05:49:34,369 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 88 flow [2023-11-29 05:49:34,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2023-11-29 05:49:34,374 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -5 predicate places. [2023-11-29 05:49:34,374 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 88 flow [2023-11-29 05:49:34,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:34,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:49:34,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 05:49:34,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:49:34,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:49:34,576 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 05:49:34,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:34,577 INFO L85 PathProgramCache]: Analyzing trace with hash 480205, now seen corresponding path program 1 times [2023-11-29 05:49:34,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:49:34,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1235743720] [2023-11-29 05:49:34,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:34,578 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:49:34,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:49:34,579 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:49:34,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-29 05:49:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:34,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 05:49:34,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:34,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 05:49:34,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:34,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 05:49:34,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:34,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:49:34,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:34,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:49:34,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:34,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:49:34,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:34,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:49:34,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:49:34,863 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:49:34,864 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:49:34,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1235743720] [2023-11-29 05:49:34,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1235743720] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:49:34,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:49:34,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:49:34,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541759411] [2023-11-29 05:49:34,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:49:34,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:49:34,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:49:34,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:49:34,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:49:35,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2023-11-29 05:49:35,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:35,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:49:35,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2023-11-29 05:49:35,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:49:35,323 INFO L124 PetriNetUnfolderBase]: 129/353 cut-off events. [2023-11-29 05:49:35,323 INFO L125 PetriNetUnfolderBase]: For 7/8 co-relation queries the response was YES. [2023-11-29 05:49:35,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 593 conditions, 353 events. 129/353 cut-off events. For 7/8 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2041 event pairs, 100 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 571. Up to 226 conditions per place. [2023-11-29 05:49:35,328 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 23 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2023-11-29 05:49:35,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 150 flow [2023-11-29 05:49:35,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:49:35,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:49:35,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2023-11-29 05:49:35,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2023-11-29 05:49:35,330 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 108 transitions. [2023-11-29 05:49:35,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 108 transitions. [2023-11-29 05:49:35,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:49:35,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 108 transitions. [2023-11-29 05:49:35,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:35,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:35,334 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:35,334 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 88 flow. Second operand 4 states and 108 transitions. [2023-11-29 05:49:35,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 150 flow [2023-11-29 05:49:35,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 43 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:49:35,336 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 111 flow [2023-11-29 05:49:35,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=111, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2023-11-29 05:49:35,337 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -2 predicate places. [2023-11-29 05:49:35,337 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 111 flow [2023-11-29 05:49:35,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:35,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:49:35,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 05:49:35,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-11-29 05:49:35,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:49:35,539 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 05:49:35,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:35,539 INFO L85 PathProgramCache]: Analyzing trace with hash 480253, now seen corresponding path program 1 times [2023-11-29 05:49:35,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:49:35,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1759174791] [2023-11-29 05:49:35,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:35,540 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:49:35,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:49:35,541 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:49:35,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-29 05:49:35,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:35,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:49:35,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:35,639 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 05:49:35,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2023-11-29 05:49:35,672 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-29 05:49:35,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-29 05:49:35,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:49:35,728 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:49:35,728 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:49:35,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1759174791] [2023-11-29 05:49:35,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1759174791] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:49:35,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:49:35,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:49:35,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282310472] [2023-11-29 05:49:35,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:49:35,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:49:35,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:49:35,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:49:35,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:49:35,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2023-11-29 05:49:35,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:35,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:49:35,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2023-11-29 05:49:35,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:49:35,969 INFO L124 PetriNetUnfolderBase]: 201/404 cut-off events. [2023-11-29 05:49:35,969 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 05:49:35,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 762 conditions, 404 events. 201/404 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 1970 event pairs, 160 based on Foata normal form. 0/304 useless extension candidates. Maximal degree in co-relation 738. Up to 335 conditions per place. [2023-11-29 05:49:35,974 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 27 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-11-29 05:49:35,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 163 flow [2023-11-29 05:49:35,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:49:35,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:49:35,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2023-11-29 05:49:35,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2023-11-29 05:49:35,977 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 78 transitions. [2023-11-29 05:49:35,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 78 transitions. [2023-11-29 05:49:35,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:49:35,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 78 transitions. [2023-11-29 05:49:35,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:35,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:35,979 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:35,979 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 111 flow. Second operand 3 states and 78 transitions. [2023-11-29 05:49:35,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 163 flow [2023-11-29 05:49:35,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 41 transitions, 160 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:49:35,982 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 106 flow [2023-11-29 05:49:35,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2023-11-29 05:49:35,983 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -3 predicate places. [2023-11-29 05:49:35,983 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 106 flow [2023-11-29 05:49:35,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:35,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:49:35,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 05:49:35,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/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 [2023-11-29 05:49:36,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:49:36,187 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 05:49:36,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:36,187 INFO L85 PathProgramCache]: Analyzing trace with hash 480254, now seen corresponding path program 1 times [2023-11-29 05:49:36,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:49:36,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1520764850] [2023-11-29 05:49:36,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:36,188 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:49:36,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:49:36,189 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:49:36,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-29 05:49:36,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:36,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:49:36,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:36,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:36,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-29 05:49:36,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:36,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 05:49:36,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:36,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:36,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-29 05:49:36,337 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 [2023-11-29 05:49:36,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:49:36,384 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:49:36,384 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:49:36,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1520764850] [2023-11-29 05:49:36,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1520764850] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:49:36,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:49:36,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:49:36,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559532332] [2023-11-29 05:49:36,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:49:36,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:49:36,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:49:36,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:49:36,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:49:36,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2023-11-29 05:49:36,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:36,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:49:36,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2023-11-29 05:49:36,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:49:36,647 INFO L124 PetriNetUnfolderBase]: 129/291 cut-off events. [2023-11-29 05:49:36,647 INFO L125 PetriNetUnfolderBase]: For 7/8 co-relation queries the response was YES. [2023-11-29 05:49:36,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 291 events. 129/291 cut-off events. For 7/8 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1372 event pairs, 100 based on Foata normal form. 37/253 useless extension candidates. Maximal degree in co-relation 530. Up to 226 conditions per place. [2023-11-29 05:49:36,650 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 25 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-11-29 05:49:36,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 39 transitions, 154 flow [2023-11-29 05:49:36,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:49:36,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:49:36,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2023-11-29 05:49:36,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5942028985507246 [2023-11-29 05:49:36,651 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 82 transitions. [2023-11-29 05:49:36,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 82 transitions. [2023-11-29 05:49:36,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:49:36,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 82 transitions. [2023-11-29 05:49:36,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:36,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:36,653 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:36,653 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 106 flow. Second operand 3 states and 82 transitions. [2023-11-29 05:49:36,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 39 transitions, 154 flow [2023-11-29 05:49:36,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 153 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:49:36,655 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 103 flow [2023-11-29 05:49:36,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2023-11-29 05:49:36,656 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -4 predicate places. [2023-11-29 05:49:36,656 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 103 flow [2023-11-29 05:49:36,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:36,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:49:36,657 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-29 05:49:36,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-11-29 05:49:36,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:49:36,858 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 05:49:36,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:36,858 INFO L85 PathProgramCache]: Analyzing trace with hash 461492086, now seen corresponding path program 1 times [2023-11-29 05:49:36,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:49:36,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [314374387] [2023-11-29 05:49:36,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:36,859 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:49:36,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:49:36,860 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:49:36,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-29 05:49:36,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:36,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:49:36,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:36,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 05:49:36,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:36,949 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 [2023-11-29 05:49:36,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:36,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:49:36,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:36,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:49:36,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:36,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 05:49:36,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:36,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:49:37,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:49:37,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:49:37,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:49:37,604 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:49:37,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [314374387] [2023-11-29 05:49:37,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [314374387] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:49:37,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:49:37,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-29 05:49:37,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273719056] [2023-11-29 05:49:37,605 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:49:37,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:49:37,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:49:37,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:49:37,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:49:38,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2023-11-29 05:49:38,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 103 flow. Second operand has 10 states, 10 states have (on average 21.0) internal successors, (210), 10 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) [2023-11-29 05:49:38,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:49:38,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2023-11-29 05:49:38,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:49:38,868 INFO L124 PetriNetUnfolderBase]: 132/300 cut-off events. [2023-11-29 05:49:38,869 INFO L125 PetriNetUnfolderBase]: For 7/8 co-relation queries the response was YES. [2023-11-29 05:49:38,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 300 events. 132/300 cut-off events. For 7/8 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1432 event pairs, 100 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 558. Up to 229 conditions per place. [2023-11-29 05:49:38,872 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 23 selfloop transitions, 13 changer transitions 0/48 dead transitions. [2023-11-29 05:49:38,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 48 transitions, 211 flow [2023-11-29 05:49:38,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:49:38,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 05:49:38,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2023-11-29 05:49:38,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5195652173913043 [2023-11-29 05:49:38,876 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 239 transitions. [2023-11-29 05:49:38,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 239 transitions. [2023-11-29 05:49:38,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:49:38,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 239 transitions. [2023-11-29 05:49:38,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 23.9) internal successors, (239), 10 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:38,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 46.0) internal successors, (506), 11 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:38,879 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 46.0) internal successors, (506), 11 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:38,880 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 103 flow. Second operand 10 states and 239 transitions. [2023-11-29 05:49:38,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 48 transitions, 211 flow [2023-11-29 05:49:38,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 48 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:49:38,882 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 182 flow [2023-11-29 05:49:38,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=182, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-11-29 05:49:38,883 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 7 predicate places. [2023-11-29 05:49:38,883 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 182 flow [2023-11-29 05:49:38,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.0) internal successors, (210), 10 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) [2023-11-29 05:49:38,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:49:38,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 05:49:38,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-11-29 05:49:39,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:49:39,084 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 05:49:39,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:39,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1422753023, now seen corresponding path program 1 times [2023-11-29 05:49:39,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:49:39,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [824339943] [2023-11-29 05:49:39,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:39,085 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:49:39,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:49:39,086 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:49:39,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-29 05:49:39,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:39,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:49:39,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:39,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:39,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-29 05:49:39,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-29 05:49:39,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:39,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:39,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:49:39,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:39,196 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:49:39,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:49:39,228 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:49:39,228 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:49:39,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [824339943] [2023-11-29 05:49:39,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [824339943] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:49:39,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:49:39,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:49:39,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361805782] [2023-11-29 05:49:39,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:49:39,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:49:39,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:49:39,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:49:39,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:49:39,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2023-11-29 05:49:39,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:39,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:49:39,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2023-11-29 05:49:39,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:49:39,443 INFO L124 PetriNetUnfolderBase]: 132/294 cut-off events. [2023-11-29 05:49:39,443 INFO L125 PetriNetUnfolderBase]: For 16/17 co-relation queries the response was YES. [2023-11-29 05:49:39,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 586 conditions, 294 events. 132/294 cut-off events. For 16/17 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1372 event pairs, 100 based on Foata normal form. 11/236 useless extension candidates. Maximal degree in co-relation 572. Up to 235 conditions per place. [2023-11-29 05:49:39,446 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 34 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-11-29 05:49:39,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 46 transitions, 248 flow [2023-11-29 05:49:39,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:49:39,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:49:39,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2023-11-29 05:49:39,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5942028985507246 [2023-11-29 05:49:39,447 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 82 transitions. [2023-11-29 05:49:39,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 82 transitions. [2023-11-29 05:49:39,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:49:39,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 82 transitions. [2023-11-29 05:49:39,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:39,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:39,449 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:39,449 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 182 flow. Second operand 3 states and 82 transitions. [2023-11-29 05:49:39,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 46 transitions, 248 flow [2023-11-29 05:49:39,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 46 transitions, 218 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-11-29 05:49:39,452 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 150 flow [2023-11-29 05:49:39,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2023-11-29 05:49:39,453 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 4 predicate places. [2023-11-29 05:49:39,454 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 150 flow [2023-11-29 05:49:39,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:39,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:49:39,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 05:49:39,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-11-29 05:49:39,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:49:39,656 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 05:49:39,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:39,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1422753022, now seen corresponding path program 1 times [2023-11-29 05:49:39,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:49:39,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2077150491] [2023-11-29 05:49:39,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:39,657 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:49:39,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:49:39,658 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:49:39,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-29 05:49:39,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:39,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:49:39,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:39,741 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 05:49:39,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 05:49:39,761 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 05:49:39,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-29 05:49:39,781 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 05:49:39,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-29 05:49:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:49:39,881 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:49:39,881 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:49:39,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2077150491] [2023-11-29 05:49:39,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2077150491] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:49:39,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:49:39,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:49:39,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687949348] [2023-11-29 05:49:39,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:49:39,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:49:39,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:49:39,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:49:39,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:49:39,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2023-11-29 05:49:39,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:39,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:49:39,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2023-11-29 05:49:39,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:49:40,086 INFO L124 PetriNetUnfolderBase]: 144/305 cut-off events. [2023-11-29 05:49:40,086 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-29 05:49:40,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 607 conditions, 305 events. 144/305 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1410 event pairs, 110 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 593. Up to 259 conditions per place. [2023-11-29 05:49:40,089 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 36 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-11-29 05:49:40,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 44 transitions, 220 flow [2023-11-29 05:49:40,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:49:40,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:49:40,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2023-11-29 05:49:40,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2023-11-29 05:49:40,090 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 78 transitions. [2023-11-29 05:49:40,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 78 transitions. [2023-11-29 05:49:40,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:49:40,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 78 transitions. [2023-11-29 05:49:40,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:40,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:40,092 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:40,092 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 150 flow. Second operand 3 states and 78 transitions. [2023-11-29 05:49:40,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 44 transitions, 220 flow [2023-11-29 05:49:40,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 44 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:49:40,094 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 147 flow [2023-11-29 05:49:40,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2023-11-29 05:49:40,095 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 3 predicate places. [2023-11-29 05:49:40,096 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 147 flow [2023-11-29 05:49:40,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:40,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:49:40,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:49:40,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/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 [2023-11-29 05:49:40,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:49:40,297 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 05:49:40,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:40,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1155689005, now seen corresponding path program 1 times [2023-11-29 05:49:40,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:49:40,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393051017] [2023-11-29 05:49:40,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:40,298 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:49:40,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:49:40,299 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:49:40,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-29 05:49:40,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:40,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:49:40,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:40,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 05:49:40,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:40,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:49:40,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:40,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-29 05:49:40,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:40,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:49:40,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:40,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:49:40,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:40,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 05:49:40,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:49:40,433 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:49:40,433 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:49:40,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [393051017] [2023-11-29 05:49:40,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [393051017] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:49:40,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:49:40,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:49:40,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968782303] [2023-11-29 05:49:40,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:49:40,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:49:40,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:49:40,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:49:40,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:49:40,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2023-11-29 05:49:40,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 147 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:40,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:49:40,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2023-11-29 05:49:40,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:49:40,649 INFO L124 PetriNetUnfolderBase]: 96/214 cut-off events. [2023-11-29 05:49:40,649 INFO L125 PetriNetUnfolderBase]: For 12/13 co-relation queries the response was YES. [2023-11-29 05:49:40,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 431 conditions, 214 events. 96/214 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 849 event pairs, 68 based on Foata normal form. 0/183 useless extension candidates. Maximal degree in co-relation 416. Up to 163 conditions per place. [2023-11-29 05:49:40,651 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 27 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2023-11-29 05:49:40,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 42 transitions, 209 flow [2023-11-29 05:49:40,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:49:40,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:49:40,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2023-11-29 05:49:40,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5597826086956522 [2023-11-29 05:49:40,653 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 103 transitions. [2023-11-29 05:49:40,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 103 transitions. [2023-11-29 05:49:40,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:49:40,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 103 transitions. [2023-11-29 05:49:40,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:40,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:40,654 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:40,654 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 147 flow. Second operand 4 states and 103 transitions. [2023-11-29 05:49:40,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 42 transitions, 209 flow [2023-11-29 05:49:40,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 42 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:49:40,657 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 154 flow [2023-11-29 05:49:40,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2023-11-29 05:49:40,658 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 3 predicate places. [2023-11-29 05:49:40,658 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 154 flow [2023-11-29 05:49:40,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:40,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:49:40,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:49:40,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-11-29 05:49:40,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:49:40,859 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 05:49:40,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:40,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1155689006, now seen corresponding path program 1 times [2023-11-29 05:49:40,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:49:40,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1087725194] [2023-11-29 05:49:40,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:40,860 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:49:40,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:49:40,861 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:49:40,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-29 05:49:40,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:40,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 05:49:40,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:40,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 05:49:40,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:40,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 05:49:40,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:40,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:49:40,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:40,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:49:40,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:40,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:49:40,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:40,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:49:41,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:49:41,123 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:49:41,123 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:49:41,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1087725194] [2023-11-29 05:49:41,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1087725194] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:49:41,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:49:41,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:49:41,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013974926] [2023-11-29 05:49:41,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:49:41,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:49:41,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:49:41,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:49:41,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:49:41,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2023-11-29 05:49:41,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 154 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:41,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:49:41,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2023-11-29 05:49:41,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:49:41,720 INFO L124 PetriNetUnfolderBase]: 188/355 cut-off events. [2023-11-29 05:49:41,721 INFO L125 PetriNetUnfolderBase]: For 12/13 co-relation queries the response was YES. [2023-11-29 05:49:41,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 730 conditions, 355 events. 188/355 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1458 event pairs, 65 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 714. Up to 204 conditions per place. [2023-11-29 05:49:41,723 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 44 selfloop transitions, 11 changer transitions 0/63 dead transitions. [2023-11-29 05:49:41,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 63 transitions, 308 flow [2023-11-29 05:49:41,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:49:41,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:49:41,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2023-11-29 05:49:41,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978260869565217 [2023-11-29 05:49:41,725 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 165 transitions. [2023-11-29 05:49:41,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 165 transitions. [2023-11-29 05:49:41,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:49:41,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 165 transitions. [2023-11-29 05:49:41,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 27.5) internal successors, (165), 6 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:41,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:41,727 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:41,727 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 154 flow. Second operand 6 states and 165 transitions. [2023-11-29 05:49:41,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 63 transitions, 308 flow [2023-11-29 05:49:41,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 63 transitions, 301 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:49:41,730 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 196 flow [2023-11-29 05:49:41,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=196, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2023-11-29 05:49:41,731 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 8 predicate places. [2023-11-29 05:49:41,731 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 196 flow [2023-11-29 05:49:41,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:41,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:49:41,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:49:41,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-11-29 05:49:41,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:49:41,932 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 05:49:41,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:41,933 INFO L85 PathProgramCache]: Analyzing trace with hash 142171416, now seen corresponding path program 1 times [2023-11-29 05:49:41,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:49:41,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411880153] [2023-11-29 05:49:41,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:41,933 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:49:41,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:49:41,934 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:49:41,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-29 05:49:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:42,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 05:49:42,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:42,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 05:49:42,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:42,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:49:42,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:42,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:49:42,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:42,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:49:42,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:42,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 05:49:42,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:42,065 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 13 treesize of output 1 [2023-11-29 05:49:42,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:49:42,242 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:49:42,242 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:49:42,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1411880153] [2023-11-29 05:49:42,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1411880153] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:49:42,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:49:42,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:49:42,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573056124] [2023-11-29 05:49:42,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:49:42,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:49:42,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:49:42,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:49:42,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:49:42,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2023-11-29 05:49:42,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 196 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:42,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:49:42,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2023-11-29 05:49:42,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:49:42,838 INFO L124 PetriNetUnfolderBase]: 298/536 cut-off events. [2023-11-29 05:49:42,838 INFO L125 PetriNetUnfolderBase]: For 168/191 co-relation queries the response was YES. [2023-11-29 05:49:42,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1350 conditions, 536 events. 298/536 cut-off events. For 168/191 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2271 event pairs, 126 based on Foata normal form. 31/528 useless extension candidates. Maximal degree in co-relation 1332. Up to 325 conditions per place. [2023-11-29 05:49:42,842 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 50 selfloop transitions, 11 changer transitions 0/70 dead transitions. [2023-11-29 05:49:42,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 70 transitions, 408 flow [2023-11-29 05:49:42,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:49:42,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:49:42,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2023-11-29 05:49:42,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5905797101449275 [2023-11-29 05:49:42,845 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 163 transitions. [2023-11-29 05:49:42,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 163 transitions. [2023-11-29 05:49:42,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:49:42,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 163 transitions. [2023-11-29 05:49:42,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 27.166666666666668) internal successors, (163), 6 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) [2023-11-29 05:49:42,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:42,847 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:42,847 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 196 flow. Second operand 6 states and 163 transitions. [2023-11-29 05:49:42,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 70 transitions, 408 flow [2023-11-29 05:49:42,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 70 transitions, 387 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 05:49:42,850 INFO L231 Difference]: Finished difference. Result has 59 places, 50 transitions, 230 flow [2023-11-29 05:49:42,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=230, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2023-11-29 05:49:42,851 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 12 predicate places. [2023-11-29 05:49:42,851 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 230 flow [2023-11-29 05:49:42,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:42,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:49:42,852 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:49:42,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/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 [2023-11-29 05:49:43,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:49:43,052 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 05:49:43,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:43,053 INFO L85 PathProgramCache]: Analyzing trace with hash 673820417, now seen corresponding path program 1 times [2023-11-29 05:49:43,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:49:43,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [336709435] [2023-11-29 05:49:43,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:43,053 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:49:43,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:49:43,054 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:49:43,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-29 05:49:43,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:43,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:49:43,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:43,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 05:49:43,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:43,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:49:43,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:43,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:49:43,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:43,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:49:43,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:43,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:49:43,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:43,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:49:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:49:43,336 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:49:43,337 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:49:43,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [336709435] [2023-11-29 05:49:43,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [336709435] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:49:43,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:49:43,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:49:43,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416074808] [2023-11-29 05:49:43,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:49:43,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:49:43,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:49:43,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:49:43,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:49:43,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 46 [2023-11-29 05:49:43,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 230 flow. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:43,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:49:43,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 46 [2023-11-29 05:49:43,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:49:43,791 INFO L124 PetriNetUnfolderBase]: 283/581 cut-off events. [2023-11-29 05:49:43,792 INFO L125 PetriNetUnfolderBase]: For 382/438 co-relation queries the response was YES. [2023-11-29 05:49:43,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1627 conditions, 581 events. 283/581 cut-off events. For 382/438 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2803 event pairs, 184 based on Foata normal form. 58/629 useless extension candidates. Maximal degree in co-relation 1607. Up to 423 conditions per place. [2023-11-29 05:49:43,796 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 50 selfloop transitions, 5 changer transitions 0/66 dead transitions. [2023-11-29 05:49:43,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 66 transitions, 393 flow [2023-11-29 05:49:43,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:49:43,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:49:43,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2023-11-29 05:49:43,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6434782608695652 [2023-11-29 05:49:43,798 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 148 transitions. [2023-11-29 05:49:43,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 148 transitions. [2023-11-29 05:49:43,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:49:43,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 148 transitions. [2023-11-29 05:49:43,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:43,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:43,800 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:43,800 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 230 flow. Second operand 5 states and 148 transitions. [2023-11-29 05:49:43,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 66 transitions, 393 flow [2023-11-29 05:49:43,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 66 transitions, 374 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 05:49:43,803 INFO L231 Difference]: Finished difference. Result has 62 places, 52 transitions, 252 flow [2023-11-29 05:49:43,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=252, PETRI_PLACES=62, PETRI_TRANSITIONS=52} [2023-11-29 05:49:43,804 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 15 predicate places. [2023-11-29 05:49:43,804 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 52 transitions, 252 flow [2023-11-29 05:49:43,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:43,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:49:43,805 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-29 05:49:43,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/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 [2023-11-29 05:49:44,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:49:44,005 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 05:49:44,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:44,005 INFO L85 PathProgramCache]: Analyzing trace with hash -2117214991, now seen corresponding path program 2 times [2023-11-29 05:49:44,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:49:44,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [53264703] [2023-11-29 05:49:44,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:49:44,006 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:49:44,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:49:44,007 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:49:44,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-29 05:49:44,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:49:44,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:49:44,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 05:49:44,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:44,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 05:49:44,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:44,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:49:44,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:44,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 05:49:44,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:44,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:49:44,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:44,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:49:44,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:44,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:49:44,429 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:49:44,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:49:45,331 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:49:45,332 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:49:45,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [53264703] [2023-11-29 05:49:45,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [53264703] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:49:45,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:49:45,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 05:49:45,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601497128] [2023-11-29 05:49:45,332 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:49:45,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 05:49:45,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:49:45,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 05:49:45,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:49:47,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2023-11-29 05:49:47,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 52 transitions, 252 flow. Second operand has 14 states, 14 states have (on average 21.571428571428573) internal successors, (302), 14 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:47,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:49:47,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2023-11-29 05:49:47,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:49:50,336 INFO L124 PetriNetUnfolderBase]: 290/583 cut-off events. [2023-11-29 05:49:50,336 INFO L125 PetriNetUnfolderBase]: For 719/777 co-relation queries the response was YES. [2023-11-29 05:49:50,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1852 conditions, 583 events. 290/583 cut-off events. For 719/777 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2620 event pairs, 191 based on Foata normal form. 36/606 useless extension candidates. Maximal degree in co-relation 1830. Up to 472 conditions per place. [2023-11-29 05:49:50,342 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 29 selfloop transitions, 31 changer transitions 0/70 dead transitions. [2023-11-29 05:49:50,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 70 transitions, 462 flow [2023-11-29 05:49:50,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 05:49:50,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 05:49:50,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 498 transitions. [2023-11-29 05:49:50,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49209486166007904 [2023-11-29 05:49:50,345 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 498 transitions. [2023-11-29 05:49:50,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 498 transitions. [2023-11-29 05:49:50,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:49:50,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 498 transitions. [2023-11-29 05:49:50,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 22.636363636363637) internal successors, (498), 22 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:50,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 46.0) internal successors, (1058), 23 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:50,349 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 46.0) internal successors, (1058), 23 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:50,349 INFO L175 Difference]: Start difference. First operand has 62 places, 52 transitions, 252 flow. Second operand 22 states and 498 transitions. [2023-11-29 05:49:50,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 70 transitions, 462 flow [2023-11-29 05:49:50,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 70 transitions, 457 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:49:50,352 INFO L231 Difference]: Finished difference. Result has 87 places, 70 transitions, 429 flow [2023-11-29 05:49:50,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=429, PETRI_PLACES=87, PETRI_TRANSITIONS=70} [2023-11-29 05:49:50,353 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 40 predicate places. [2023-11-29 05:49:50,353 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 70 transitions, 429 flow [2023-11-29 05:49:50,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 21.571428571428573) internal successors, (302), 14 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:50,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:49:50,354 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:49:50,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-11-29 05:49:50,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:49:50,554 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 05:49:50,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:50,554 INFO L85 PathProgramCache]: Analyzing trace with hash -744131784, now seen corresponding path program 1 times [2023-11-29 05:49:50,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:49:50,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1121880667] [2023-11-29 05:49:50,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:50,555 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:49:50,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:49:50,556 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:49:50,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-29 05:49:50,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:50,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 05:49:50,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:50,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 05:49:50,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:50,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:49:50,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:50,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 05:49:50,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:50,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:49:50,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:50,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:49:50,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:50,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:49:50,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:49:50,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:49:51,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:49:51,501 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:49:51,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1121880667] [2023-11-29 05:49:51,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1121880667] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:49:51,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:49:51,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 05:49:51,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610935200] [2023-11-29 05:49:51,502 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:49:51,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 05:49:51,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:49:51,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 05:49:51,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:49:52,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2023-11-29 05:49:52,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 70 transitions, 429 flow. Second operand has 14 states, 14 states have (on average 21.571428571428573) internal successors, (302), 14 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:52,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:49:52,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2023-11-29 05:49:52,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:49:54,962 INFO L124 PetriNetUnfolderBase]: 638/1141 cut-off events. [2023-11-29 05:49:54,962 INFO L125 PetriNetUnfolderBase]: For 1118/1210 co-relation queries the response was YES. [2023-11-29 05:49:54,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3687 conditions, 1141 events. 638/1141 cut-off events. For 1118/1210 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 5171 event pairs, 94 based on Foata normal form. 108/1239 useless extension candidates. Maximal degree in co-relation 3659. Up to 296 conditions per place. [2023-11-29 05:49:54,976 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 140 selfloop transitions, 30 changer transitions 0/179 dead transitions. [2023-11-29 05:49:54,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 179 transitions, 1236 flow [2023-11-29 05:49:54,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 05:49:54,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 05:49:54,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 376 transitions. [2023-11-29 05:49:54,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6287625418060201 [2023-11-29 05:49:54,979 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 376 transitions. [2023-11-29 05:49:54,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 376 transitions. [2023-11-29 05:49:54,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:49:54,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 376 transitions. [2023-11-29 05:49:54,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 28.923076923076923) internal successors, (376), 13 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:54,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 46.0) internal successors, (644), 14 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:54,983 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 46.0) internal successors, (644), 14 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:54,983 INFO L175 Difference]: Start difference. First operand has 87 places, 70 transitions, 429 flow. Second operand 13 states and 376 transitions. [2023-11-29 05:49:54,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 179 transitions, 1236 flow [2023-11-29 05:49:54,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 179 transitions, 1156 flow, removed 27 selfloop flow, removed 9 redundant places. [2023-11-29 05:49:55,002 INFO L231 Difference]: Finished difference. Result has 94 places, 81 transitions, 507 flow [2023-11-29 05:49:55,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=507, PETRI_PLACES=94, PETRI_TRANSITIONS=81} [2023-11-29 05:49:55,003 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 47 predicate places. [2023-11-29 05:49:55,003 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 81 transitions, 507 flow [2023-11-29 05:49:55,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 21.571428571428573) internal successors, (302), 14 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:55,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:49:55,003 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:49:55,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-11-29 05:49:55,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:49:55,204 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 05:49:55,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:55,204 INFO L85 PathProgramCache]: Analyzing trace with hash -619269273, now seen corresponding path program 1 times [2023-11-29 05:49:55,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:49:55,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [710791808] [2023-11-29 05:49:55,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:55,205 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:49:55,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:49:55,207 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:49:55,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-29 05:49:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:55,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 05:49:55,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:55,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 05:49:55,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:55,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:49:55,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:55,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:49:55,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:55,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:49:55,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:55,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:49:55,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:49:55,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 05:49:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:49:55,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:49:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:49:56,337 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:49:56,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [710791808] [2023-11-29 05:49:56,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [710791808] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:49:56,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:49:56,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 05:49:56,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452598293] [2023-11-29 05:49:56,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:49:56,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 05:49:56,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:49:56,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 05:49:56,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:49:57,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2023-11-29 05:49:57,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 81 transitions, 507 flow. Second operand has 14 states, 14 states have (on average 21.857142857142858) internal successors, (306), 14 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:57,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:49:57,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2023-11-29 05:49:57,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:50:00,206 INFO L124 PetriNetUnfolderBase]: 1144/1937 cut-off events. [2023-11-29 05:50:00,206 INFO L125 PetriNetUnfolderBase]: For 4899/5087 co-relation queries the response was YES. [2023-11-29 05:50:00,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7480 conditions, 1937 events. 1144/1937 cut-off events. For 4899/5087 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 9059 event pairs, 230 based on Foata normal form. 186/2082 useless extension candidates. Maximal degree in co-relation 7448. Up to 551 conditions per place. [2023-11-29 05:50:00,223 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 195 selfloop transitions, 29 changer transitions 2/239 dead transitions. [2023-11-29 05:50:00,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 239 transitions, 2131 flow [2023-11-29 05:50:00,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 05:50:00,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 05:50:00,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 366 transitions. [2023-11-29 05:50:00,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6120401337792643 [2023-11-29 05:50:00,226 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 366 transitions. [2023-11-29 05:50:00,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 366 transitions. [2023-11-29 05:50:00,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:50:00,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 366 transitions. [2023-11-29 05:50:00,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 28.153846153846153) internal successors, (366), 13 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:00,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 46.0) internal successors, (644), 14 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:00,229 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 46.0) internal successors, (644), 14 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:00,229 INFO L175 Difference]: Start difference. First operand has 94 places, 81 transitions, 507 flow. Second operand 13 states and 366 transitions. [2023-11-29 05:50:00,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 239 transitions, 2131 flow [2023-11-29 05:50:00,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 239 transitions, 1948 flow, removed 60 selfloop flow, removed 4 redundant places. [2023-11-29 05:50:00,238 INFO L231 Difference]: Finished difference. Result has 106 places, 92 transitions, 630 flow [2023-11-29 05:50:00,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=630, PETRI_PLACES=106, PETRI_TRANSITIONS=92} [2023-11-29 05:50:00,238 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 59 predicate places. [2023-11-29 05:50:00,238 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 92 transitions, 630 flow [2023-11-29 05:50:00,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 21.857142857142858) internal successors, (306), 14 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:00,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:50:00,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:50:00,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2023-11-29 05:50:00,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:50:00,439 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 05:50:00,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:50:00,439 INFO L85 PathProgramCache]: Analyzing trace with hash -2129706629, now seen corresponding path program 1 times [2023-11-29 05:50:00,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:50:00,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [222823472] [2023-11-29 05:50:00,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:50:00,440 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:50:00,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:50:00,441 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:50:00,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-11-29 05:50:00,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:50:00,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:50:00,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:50:00,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:50:00,537 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:50:00,538 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:50:00,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [222823472] [2023-11-29 05:50:00,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [222823472] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:50:00,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:50:00,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:50:00,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799117790] [2023-11-29 05:50:00,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:50:00,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:50:00,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:50:00,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:50:00,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:50:00,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 46 [2023-11-29 05:50:00,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 92 transitions, 630 flow. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:00,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:50:00,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 46 [2023-11-29 05:50:00,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:50:00,926 INFO L124 PetriNetUnfolderBase]: 982/1846 cut-off events. [2023-11-29 05:50:00,927 INFO L125 PetriNetUnfolderBase]: For 5745/5848 co-relation queries the response was YES. [2023-11-29 05:50:00,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7660 conditions, 1846 events. 982/1846 cut-off events. For 5745/5848 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 9247 event pairs, 320 based on Foata normal form. 36/1856 useless extension candidates. Maximal degree in co-relation 7624. Up to 1395 conditions per place. [2023-11-29 05:50:00,952 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 77 selfloop transitions, 5 changer transitions 4/105 dead transitions. [2023-11-29 05:50:00,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 105 transitions, 883 flow [2023-11-29 05:50:00,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:50:00,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:50:00,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2023-11-29 05:50:00,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6956521739130435 [2023-11-29 05:50:00,953 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 96 transitions. [2023-11-29 05:50:00,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 96 transitions. [2023-11-29 05:50:00,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:50:00,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 96 transitions. [2023-11-29 05:50:00,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:00,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:00,955 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:00,955 INFO L175 Difference]: Start difference. First operand has 106 places, 92 transitions, 630 flow. Second operand 3 states and 96 transitions. [2023-11-29 05:50:00,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 105 transitions, 883 flow [2023-11-29 05:50:00,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 105 transitions, 845 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-29 05:50:00,968 INFO L231 Difference]: Finished difference. Result has 105 places, 93 transitions, 629 flow [2023-11-29 05:50:00,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=629, PETRI_PLACES=105, PETRI_TRANSITIONS=93} [2023-11-29 05:50:00,969 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 58 predicate places. [2023-11-29 05:50:00,969 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 93 transitions, 629 flow [2023-11-29 05:50:00,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:00,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:50:00,969 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:50:00,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-11-29 05:50:01,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:50:01,170 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 05:50:01,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:50:01,170 INFO L85 PathProgramCache]: Analyzing trace with hash 449344023, now seen corresponding path program 2 times [2023-11-29 05:50:01,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:50:01,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [859568978] [2023-11-29 05:50:01,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:50:01,171 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:50:01,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:50:01,172 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:50:01,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-11-29 05:50:01,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:50:01,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:50:01,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 05:50:01,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:50:01,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 05:50:01,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:50:01,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:50:01,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:50:01,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:50:01,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:50:01,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:50:01,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:50:01,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:50:01,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:50:01,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 05:50:01,812 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:50:01,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:50:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:50:03,161 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:50:03,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [859568978] [2023-11-29 05:50:03,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [859568978] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:50:03,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:50:03,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2023-11-29 05:50:03,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308247653] [2023-11-29 05:50:03,162 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:50:03,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 05:50:03,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:50:03,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 05:50:03,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-11-29 05:50:07,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 46 [2023-11-29 05:50:07,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 93 transitions, 629 flow. Second operand has 18 states, 18 states have (on average 22.666666666666668) internal successors, (408), 18 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:07,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:50:07,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 46 [2023-11-29 05:50:07,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:50:12,902 INFO L124 PetriNetUnfolderBase]: 2352/4305 cut-off events. [2023-11-29 05:50:12,902 INFO L125 PetriNetUnfolderBase]: For 17554/17869 co-relation queries the response was YES. [2023-11-29 05:50:12,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18263 conditions, 4305 events. 2352/4305 cut-off events. For 17554/17869 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 26506 event pairs, 601 based on Foata normal form. 184/4357 useless extension candidates. Maximal degree in co-relation 18226. Up to 1261 conditions per place. [2023-11-29 05:50:12,943 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 299 selfloop transitions, 67 changer transitions 0/385 dead transitions. [2023-11-29 05:50:12,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 385 transitions, 3330 flow [2023-11-29 05:50:12,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 05:50:12,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 05:50:12,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 627 transitions. [2023-11-29 05:50:12,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6490683229813664 [2023-11-29 05:50:12,948 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 627 transitions. [2023-11-29 05:50:12,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 627 transitions. [2023-11-29 05:50:12,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:50:12,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 627 transitions. [2023-11-29 05:50:12,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 29.857142857142858) internal successors, (627), 21 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:12,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 46.0) internal successors, (1012), 22 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:12,961 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 46.0) internal successors, (1012), 22 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:12,961 INFO L175 Difference]: Start difference. First operand has 105 places, 93 transitions, 629 flow. Second operand 21 states and 627 transitions. [2023-11-29 05:50:12,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 385 transitions, 3330 flow [2023-11-29 05:50:12,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 385 transitions, 3211 flow, removed 52 selfloop flow, removed 2 redundant places. [2023-11-29 05:50:12,989 INFO L231 Difference]: Finished difference. Result has 125 places, 131 transitions, 1130 flow [2023-11-29 05:50:12,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1130, PETRI_PLACES=125, PETRI_TRANSITIONS=131} [2023-11-29 05:50:12,989 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 78 predicate places. [2023-11-29 05:50:12,990 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 131 transitions, 1130 flow [2023-11-29 05:50:12,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 22.666666666666668) internal successors, (408), 18 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:12,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:50:12,990 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2023-11-29 05:50:12,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/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)] Forceful destruction successful, exit code 0 [2023-11-29 05:50:13,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:50:13,196 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 05:50:13,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:50:13,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1353756889, now seen corresponding path program 3 times [2023-11-29 05:50:13,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:50:13,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881842532] [2023-11-29 05:50:13,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:50:13,197 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:50:13,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:50:13,198 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:50:13,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-11-29 05:50:13,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-29 05:50:13,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:50:13,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 05:50:13,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:50:13,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 05:50:13,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:50:13,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 05:50:13,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:50:13,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:50:13,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:50:13,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:50:13,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:50:13,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:50:13,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:50:13,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:50:14,048 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:50:14,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:50:16,702 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:50:16,702 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:50:16,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881842532] [2023-11-29 05:50:16,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881842532] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:50:16,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:50:16,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2023-11-29 05:50:16,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721947835] [2023-11-29 05:50:16,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:50:16,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 05:50:16,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:50:16,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 05:50:16,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2023-11-29 05:50:22,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2023-11-29 05:50:22,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 131 transitions, 1130 flow. Second operand has 26 states, 26 states have (on average 21.76923076923077) internal successors, (566), 26 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:22,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:50:22,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2023-11-29 05:50:22,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:50:51,671 INFO L124 PetriNetUnfolderBase]: 2355/4358 cut-off events. [2023-11-29 05:50:51,671 INFO L125 PetriNetUnfolderBase]: For 22065/22412 co-relation queries the response was YES. [2023-11-29 05:50:51,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19925 conditions, 4358 events. 2355/4358 cut-off events. For 22065/22412 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 26577 event pairs, 1507 based on Foata normal form. 171/4425 useless extension candidates. Maximal degree in co-relation 19884. Up to 3573 conditions per place. [2023-11-29 05:50:51,704 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 83 selfloop transitions, 66 changer transitions 0/167 dead transitions. [2023-11-29 05:50:51,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 167 transitions, 1704 flow [2023-11-29 05:50:51,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 05:50:51,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-29 05:50:51,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 1019 transitions. [2023-11-29 05:50:51,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4815689981096408 [2023-11-29 05:50:51,708 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 1019 transitions. [2023-11-29 05:50:51,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 1019 transitions. [2023-11-29 05:50:51,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:50:51,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 1019 transitions. [2023-11-29 05:50:51,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 22.152173913043477) internal successors, (1019), 46 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:51,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 46.0) internal successors, (2162), 47 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:51,724 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 46.0) internal successors, (2162), 47 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:51,724 INFO L175 Difference]: Start difference. First operand has 125 places, 131 transitions, 1130 flow. Second operand 46 states and 1019 transitions. [2023-11-29 05:50:51,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 167 transitions, 1704 flow [2023-11-29 05:50:51,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 167 transitions, 1632 flow, removed 32 selfloop flow, removed 3 redundant places. [2023-11-29 05:50:51,750 INFO L231 Difference]: Finished difference. Result has 179 places, 167 transitions, 1520 flow [2023-11-29 05:50:51,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1058, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=1520, PETRI_PLACES=179, PETRI_TRANSITIONS=167} [2023-11-29 05:50:51,751 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 132 predicate places. [2023-11-29 05:50:51,751 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 167 transitions, 1520 flow [2023-11-29 05:50:51,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 21.76923076923077) internal successors, (566), 26 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:51,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:50:51,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:50:51,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2023-11-29 05:50:51,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:50:51,956 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 05:50:51,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:50:51,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1713475789, now seen corresponding path program 1 times [2023-11-29 05:50:51,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:50:51,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1326639312] [2023-11-29 05:50:51,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:50:51,957 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:50:51,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:50:51,958 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:50:51,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-11-29 05:50:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:50:52,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:50:52,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:50:52,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:50:52,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:50:52,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:50:52,286 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:50:52,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1326639312] [2023-11-29 05:50:52,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1326639312] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:50:52,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:50:52,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-11-29 05:50:52,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007612150] [2023-11-29 05:50:52,286 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:50:52,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:50:52,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:50:52,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:50:52,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:50:52,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2023-11-29 05:50:52,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 167 transitions, 1520 flow. Second operand has 12 states, 12 states have (on average 22.5) internal successors, (270), 12 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:52,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:50:52,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2023-11-29 05:50:52,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:50:53,659 INFO L124 PetriNetUnfolderBase]: 2792/4781 cut-off events. [2023-11-29 05:50:53,659 INFO L125 PetriNetUnfolderBase]: For 20957/21435 co-relation queries the response was YES. [2023-11-29 05:50:53,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21769 conditions, 4781 events. 2792/4781 cut-off events. For 20957/21435 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 27270 event pairs, 756 based on Foata normal form. 298/5004 useless extension candidates. Maximal degree in co-relation 21715. Up to 2205 conditions per place. [2023-11-29 05:50:53,706 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 208 selfloop transitions, 23 changer transitions 0/244 dead transitions. [2023-11-29 05:50:53,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 244 transitions, 2567 flow [2023-11-29 05:50:53,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:50:53,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 05:50:53,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 269 transitions. [2023-11-29 05:50:53,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5847826086956521 [2023-11-29 05:50:53,708 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 269 transitions. [2023-11-29 05:50:53,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 269 transitions. [2023-11-29 05:50:53,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:50:53,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 269 transitions. [2023-11-29 05:50:53,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 26.9) internal successors, (269), 10 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) [2023-11-29 05:50:53,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 46.0) internal successors, (506), 11 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:53,711 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 46.0) internal successors, (506), 11 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:53,711 INFO L175 Difference]: Start difference. First operand has 179 places, 167 transitions, 1520 flow. Second operand 10 states and 269 transitions. [2023-11-29 05:50:53,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 244 transitions, 2567 flow [2023-11-29 05:50:53,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 244 transitions, 2401 flow, removed 53 selfloop flow, removed 21 redundant places. [2023-11-29 05:50:53,773 INFO L231 Difference]: Finished difference. Result has 167 places, 175 transitions, 1451 flow [2023-11-29 05:50:53,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1351, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1451, PETRI_PLACES=167, PETRI_TRANSITIONS=175} [2023-11-29 05:50:53,774 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 120 predicate places. [2023-11-29 05:50:53,774 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 175 transitions, 1451 flow [2023-11-29 05:50:53,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 22.5) internal successors, (270), 12 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:53,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:50:53,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:50:53,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/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)] Forceful destruction successful, exit code 0 [2023-11-29 05:50:53,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:50:53,975 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 05:50:53,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:50:53,976 INFO L85 PathProgramCache]: Analyzing trace with hash -364492420, now seen corresponding path program 1 times [2023-11-29 05:50:53,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:50:53,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428190256] [2023-11-29 05:50:53,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:50:53,976 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:50:53,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:50:53,977 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:50:53,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-11-29 05:50:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:50:54,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:50:54,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:50:54,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:50:54,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:50:54,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:50:54,332 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:50:54,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428190256] [2023-11-29 05:50:54,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428190256] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:50:54,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:50:54,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-11-29 05:50:54,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463173101] [2023-11-29 05:50:54,333 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:50:54,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:50:54,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:50:54,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:50:54,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:50:54,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2023-11-29 05:50:54,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 175 transitions, 1451 flow. Second operand has 12 states, 12 states have (on average 22.166666666666668) internal successors, (266), 12 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:54,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:50:54,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2023-11-29 05:50:54,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:50:55,630 INFO L124 PetriNetUnfolderBase]: 2685/4752 cut-off events. [2023-11-29 05:50:55,631 INFO L125 PetriNetUnfolderBase]: For 20570/20964 co-relation queries the response was YES. [2023-11-29 05:50:55,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21828 conditions, 4752 events. 2685/4752 cut-off events. For 20570/20964 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 27972 event pairs, 743 based on Foata normal form. 295/5003 useless extension candidates. Maximal degree in co-relation 21774. Up to 2135 conditions per place. [2023-11-29 05:50:55,671 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 192 selfloop transitions, 23 changer transitions 4/236 dead transitions. [2023-11-29 05:50:55,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 236 transitions, 2304 flow [2023-11-29 05:50:55,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:50:55,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 05:50:55,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 272 transitions. [2023-11-29 05:50:55,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.591304347826087 [2023-11-29 05:50:55,673 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 272 transitions. [2023-11-29 05:50:55,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 272 transitions. [2023-11-29 05:50:55,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:50:55,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 272 transitions. [2023-11-29 05:50:55,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 27.2) internal successors, (272), 10 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:55,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 46.0) internal successors, (506), 11 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:55,675 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 46.0) internal successors, (506), 11 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:55,675 INFO L175 Difference]: Start difference. First operand has 167 places, 175 transitions, 1451 flow. Second operand 10 states and 272 transitions. [2023-11-29 05:50:55,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 236 transitions, 2304 flow [2023-11-29 05:50:55,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 236 transitions, 2296 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 05:50:55,705 INFO L231 Difference]: Finished difference. Result has 172 places, 173 transitions, 1474 flow [2023-11-29 05:50:55,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1421, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1474, PETRI_PLACES=172, PETRI_TRANSITIONS=173} [2023-11-29 05:50:55,705 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 125 predicate places. [2023-11-29 05:50:55,705 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 173 transitions, 1474 flow [2023-11-29 05:50:55,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 22.166666666666668) internal successors, (266), 12 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:50:55,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:50:55,706 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:50:55,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2023-11-29 05:50:55,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:50:55,907 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 05:50:55,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:50:55,907 INFO L85 PathProgramCache]: Analyzing trace with hash 2078651215, now seen corresponding path program 2 times [2023-11-29 05:50:55,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:50:55,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [898780820] [2023-11-29 05:50:55,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:50:55,908 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:50:55,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:50:55,909 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:50:55,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-11-29 05:50:56,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:50:56,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:50:56,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 05:50:56,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:50:56,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 05:50:56,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:50:56,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:50:56,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:50:56,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:50:56,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:50:56,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:50:56,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:50:56,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 05:50:56,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:50:56,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:50:56,643 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:50:56,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:50:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:50:58,177 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:50:58,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [898780820] [2023-11-29 05:50:58,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [898780820] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:50:58,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:50:58,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2023-11-29 05:50:58,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123088668] [2023-11-29 05:50:58,178 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:50:58,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 05:50:58,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:50:58,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 05:50:58,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-11-29 05:51:02,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 46 [2023-11-29 05:51:02,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 173 transitions, 1474 flow. Second operand has 18 states, 18 states have (on average 22.88888888888889) internal successors, (412), 18 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:51:02,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:51:02,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 46 [2023-11-29 05:51:02,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:51:08,146 INFO L124 PetriNetUnfolderBase]: 2169/4032 cut-off events. [2023-11-29 05:51:08,146 INFO L125 PetriNetUnfolderBase]: For 21894/22201 co-relation queries the response was YES. [2023-11-29 05:51:08,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19485 conditions, 4032 events. 2169/4032 cut-off events. For 21894/22201 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 24478 event pairs, 765 based on Foata normal form. 158/4043 useless extension candidates. Maximal degree in co-relation 19431. Up to 1126 conditions per place. [2023-11-29 05:51:08,186 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 315 selfloop transitions, 86 changer transitions 0/422 dead transitions. [2023-11-29 05:51:08,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 422 transitions, 4519 flow [2023-11-29 05:51:08,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 05:51:08,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 05:51:08,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 608 transitions. [2023-11-29 05:51:08,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.629399585921325 [2023-11-29 05:51:08,189 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 608 transitions. [2023-11-29 05:51:08,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 608 transitions. [2023-11-29 05:51:08,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:51:08,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 608 transitions. [2023-11-29 05:51:08,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 28.952380952380953) internal successors, (608), 21 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:51:08,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 46.0) internal successors, (1012), 22 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:51:08,194 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 46.0) internal successors, (1012), 22 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:51:08,194 INFO L175 Difference]: Start difference. First operand has 172 places, 173 transitions, 1474 flow. Second operand 21 states and 608 transitions. [2023-11-29 05:51:08,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 422 transitions, 4519 flow [2023-11-29 05:51:08,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 422 transitions, 4429 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 05:51:08,237 INFO L231 Difference]: Finished difference. Result has 191 places, 191 transitions, 1851 flow [2023-11-29 05:51:08,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1353, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1851, PETRI_PLACES=191, PETRI_TRANSITIONS=191} [2023-11-29 05:51:08,238 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 144 predicate places. [2023-11-29 05:51:08,238 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 191 transitions, 1851 flow [2023-11-29 05:51:08,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 22.88888888888889) internal successors, (412), 18 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:51:08,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:51:08,239 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-29 05:51:08,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2023-11-29 05:51:08,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:51:08,442 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 05:51:08,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:51:08,443 INFO L85 PathProgramCache]: Analyzing trace with hash -2016097681, now seen corresponding path program 3 times [2023-11-29 05:51:08,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:51:08,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1499732092] [2023-11-29 05:51:08,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:51:08,444 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:51:08,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:51:08,444 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:51:08,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-11-29 05:51:08,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 05:51:08,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:51:08,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 05:51:08,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:51:08,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 05:51:08,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:51:08,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:51:08,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:51:08,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:51:08,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:51:08,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:51:08,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:51:08,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:51:08,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:51:08,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 05:51:09,826 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:51:09,826 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:51:18,432 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:51:18,432 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:51:18,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1499732092] [2023-11-29 05:51:18,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1499732092] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:51:18,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:51:18,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2023-11-29 05:51:18,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009155955] [2023-11-29 05:51:18,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:51:18,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 05:51:18,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:51:18,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 05:51:18,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=312, Unknown=1, NotChecked=0, Total=380 [2023-11-29 05:51:22,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:51:26,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:51:31,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:51:35,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:51:39,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:51:44,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:51:48,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:51:52,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:51:57,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:52:01,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:52:06,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:52:06,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2023-11-29 05:52:06,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 191 transitions, 1851 flow. Second operand has 20 states, 20 states have (on average 12.2) internal successors, (244), 20 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:52:06,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:52:06,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2023-11-29 05:52:06,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:52:19,617 INFO L124 PetriNetUnfolderBase]: 5433/9252 cut-off events. [2023-11-29 05:52:19,617 INFO L125 PetriNetUnfolderBase]: For 52291/52709 co-relation queries the response was YES. [2023-11-29 05:52:19,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46083 conditions, 9252 events. 5433/9252 cut-off events. For 52291/52709 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 57489 event pairs, 2290 based on Foata normal form. 245/9423 useless extension candidates. Maximal degree in co-relation 46024. Up to 4769 conditions per place. [2023-11-29 05:52:19,753 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 286 selfloop transitions, 87 changer transitions 0/382 dead transitions. [2023-11-29 05:52:19,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 382 transitions, 4465 flow [2023-11-29 05:52:19,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 05:52:19,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 05:52:19,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 242 transitions. [2023-11-29 05:52:19,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40468227424749165 [2023-11-29 05:52:19,757 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 242 transitions. [2023-11-29 05:52:19,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 242 transitions. [2023-11-29 05:52:19,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:52:19,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 242 transitions. [2023-11-29 05:52:19,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 18.615384615384617) internal successors, (242), 13 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:52:19,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 46.0) internal successors, (644), 14 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:52:19,760 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 46.0) internal successors, (644), 14 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:52:19,760 INFO L175 Difference]: Start difference. First operand has 191 places, 191 transitions, 1851 flow. Second operand 13 states and 242 transitions. [2023-11-29 05:52:19,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 382 transitions, 4465 flow [2023-11-29 05:52:19,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 382 transitions, 4107 flow, removed 122 selfloop flow, removed 6 redundant places. [2023-11-29 05:52:19,880 INFO L231 Difference]: Finished difference. Result has 201 places, 201 transitions, 2084 flow [2023-11-29 05:52:19,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1715, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2084, PETRI_PLACES=201, PETRI_TRANSITIONS=201} [2023-11-29 05:52:19,881 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 154 predicate places. [2023-11-29 05:52:19,881 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 201 transitions, 2084 flow [2023-11-29 05:52:19,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 12.2) internal successors, (244), 20 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:52:19,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:52:19,882 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-29 05:52:19,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/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)] Forceful destruction successful, exit code 0 [2023-11-29 05:52:20,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:52:20,082 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 05:52:20,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:52:20,082 INFO L85 PathProgramCache]: Analyzing trace with hash -889706094, now seen corresponding path program 4 times [2023-11-29 05:52:20,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:52:20,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18779905] [2023-11-29 05:52:20,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:52:20,083 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:52:20,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:52:20,084 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:52:20,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-11-29 05:52:20,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:52:20,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:52:20,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 05:52:20,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:52:20,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 05:52:20,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:52:20,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:52:20,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:52:20,349 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 [2023-11-29 05:52:20,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:52:20,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:52:20,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:52:20,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 05:52:20,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:52:20,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:52:22,070 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 05:52:22,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:52:25,840 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 05:52:25,841 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:52:25,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18779905] [2023-11-29 05:52:25,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18779905] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:52:25,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:52:25,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2023-11-29 05:52:25,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144333878] [2023-11-29 05:52:25,841 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:52:25,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 05:52:25,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:52:25,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 05:52:25,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:52:35,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2023-11-29 05:52:35,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 201 transitions, 2084 flow. Second operand has 20 states, 20 states have (on average 22.0) internal successors, (440), 20 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:52:35,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:52:35,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2023-11-29 05:52:35,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:52:59,724 INFO L124 PetriNetUnfolderBase]: 5532/9418 cut-off events. [2023-11-29 05:52:59,724 INFO L125 PetriNetUnfolderBase]: For 57970/59282 co-relation queries the response was YES. [2023-11-29 05:52:59,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49812 conditions, 9418 events. 5532/9418 cut-off events. For 57970/59282 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 56905 event pairs, 482 based on Foata normal form. 779/9982 useless extension candidates. Maximal degree in co-relation 49748. Up to 2756 conditions per place. [2023-11-29 05:52:59,907 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 810 selfloop transitions, 91 changer transitions 5/920 dead transitions. [2023-11-29 05:52:59,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 920 transitions, 10710 flow [2023-11-29 05:52:59,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 05:52:59,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-29 05:52:59,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 738 transitions. [2023-11-29 05:52:59,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6417391304347826 [2023-11-29 05:52:59,911 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 738 transitions. [2023-11-29 05:52:59,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 738 transitions. [2023-11-29 05:52:59,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:52:59,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 738 transitions. [2023-11-29 05:52:59,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 29.52) internal successors, (738), 25 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:52:59,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 46.0) internal successors, (1196), 26 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:52:59,915 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 46.0) internal successors, (1196), 26 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:52:59,915 INFO L175 Difference]: Start difference. First operand has 201 places, 201 transitions, 2084 flow. Second operand 25 states and 738 transitions. [2023-11-29 05:52:59,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 920 transitions, 10710 flow [2023-11-29 05:53:00,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 920 transitions, 10580 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 05:53:00,052 INFO L231 Difference]: Finished difference. Result has 226 places, 228 transitions, 2543 flow [2023-11-29 05:53:00,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1992, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2543, PETRI_PLACES=226, PETRI_TRANSITIONS=228} [2023-11-29 05:53:00,053 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 179 predicate places. [2023-11-29 05:53:00,053 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 228 transitions, 2543 flow [2023-11-29 05:53:00,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 22.0) internal successors, (440), 20 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:53:00,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:53:00,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:53:00,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2023-11-29 05:53:00,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:53:00,254 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 05:53:00,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:53:00,254 INFO L85 PathProgramCache]: Analyzing trace with hash -746377969, now seen corresponding path program 1 times [2023-11-29 05:53:00,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:53:00,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10533057] [2023-11-29 05:53:00,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:53:00,255 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:53:00,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:53:00,256 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:53:00,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-11-29 05:53:00,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:00,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 05:53:00,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:53:00,726 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:53:00,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 46 [2023-11-29 05:53:00,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:53:00,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:53:01,642 INFO L349 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2023-11-29 05:53:01,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 187 treesize of output 91 [2023-11-29 05:53:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:53:06,648 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:53:06,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10533057] [2023-11-29 05:53:06,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10533057] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:53:06,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:53:06,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-29 05:53:06,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466752954] [2023-11-29 05:53:06,649 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:53:06,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:53:06,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:53:06,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:53:06,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:53:06,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 46 [2023-11-29 05:53:06,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 228 transitions, 2543 flow. Second operand has 9 states, 9 states have (on average 23.555555555555557) internal successors, (212), 9 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:53:06,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:53:06,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 46 [2023-11-29 05:53:06,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:53:10,727 INFO L124 PetriNetUnfolderBase]: 4782/8866 cut-off events. [2023-11-29 05:53:10,728 INFO L125 PetriNetUnfolderBase]: For 67633/68262 co-relation queries the response was YES. [2023-11-29 05:53:10,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50297 conditions, 8866 events. 4782/8866 cut-off events. For 67633/68262 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 57366 event pairs, 1590 based on Foata normal form. 189/8887 useless extension candidates. Maximal degree in co-relation 50225. Up to 6728 conditions per place. [2023-11-29 05:53:10,828 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 222 selfloop transitions, 43 changer transitions 10/302 dead transitions. [2023-11-29 05:53:10,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 302 transitions, 3799 flow [2023-11-29 05:53:10,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:53:10,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:53:10,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2023-11-29 05:53:10,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6594202898550725 [2023-11-29 05:53:10,831 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 182 transitions. [2023-11-29 05:53:10,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 182 transitions. [2023-11-29 05:53:10,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:53:10,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 182 transitions. [2023-11-29 05:53:10,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 30.333333333333332) internal successors, (182), 6 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:53:10,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:53:10,832 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:53:10,832 INFO L175 Difference]: Start difference. First operand has 226 places, 228 transitions, 2543 flow. Second operand 6 states and 182 transitions. [2023-11-29 05:53:10,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 302 transitions, 3799 flow [2023-11-29 05:53:11,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 302 transitions, 3623 flow, removed 26 selfloop flow, removed 9 redundant places. [2023-11-29 05:53:11,006 INFO L231 Difference]: Finished difference. Result has 225 places, 250 transitions, 2818 flow [2023-11-29 05:53:11,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2407, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2818, PETRI_PLACES=225, PETRI_TRANSITIONS=250} [2023-11-29 05:53:11,007 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 178 predicate places. [2023-11-29 05:53:11,007 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 250 transitions, 2818 flow [2023-11-29 05:53:11,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 23.555555555555557) internal successors, (212), 9 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:53:11,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:53:11,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:53:11,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/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 [2023-11-29 05:53:11,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:53:11,208 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 05:53:11,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:53:11,209 INFO L85 PathProgramCache]: Analyzing trace with hash 640883469, now seen corresponding path program 2 times [2023-11-29 05:53:11,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:53:11,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [577098338] [2023-11-29 05:53:11,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:53:11,209 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:53:11,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:53:11,210 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:53:11,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-11-29 05:53:11,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:53:11,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:53:11,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 05:53:11,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:53:11,803 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:53:11,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 46 [2023-11-29 05:53:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:53:11,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:53:12,648 INFO L349 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-11-29 05:53:12,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 226 treesize of output 99 [2023-11-29 05:53:22,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:53:22,224 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:53:22,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [577098338] [2023-11-29 05:53:22,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [577098338] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:53:22,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:53:22,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-29 05:53:22,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355238306] [2023-11-29 05:53:22,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:53:22,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:53:22,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:53:22,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:53:22,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:53:24,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 46 [2023-11-29 05:53:24,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 250 transitions, 2818 flow. Second operand has 9 states, 9 states have (on average 24.0) internal successors, (216), 9 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) [2023-11-29 05:53:24,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:53:24,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 46 [2023-11-29 05:53:24,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:53:32,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 05:53:36,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 05:53:41,516 INFO L124 PetriNetUnfolderBase]: 4977/9329 cut-off events. [2023-11-29 05:53:41,517 INFO L125 PetriNetUnfolderBase]: For 77980/78533 co-relation queries the response was YES. [2023-11-29 05:53:41,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51692 conditions, 9329 events. 4977/9329 cut-off events. For 77980/78533 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 61396 event pairs, 1888 based on Foata normal form. 157/9339 useless extension candidates. Maximal degree in co-relation 51617. Up to 7179 conditions per place. [2023-11-29 05:53:41,640 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 228 selfloop transitions, 50 changer transitions 10/315 dead transitions. [2023-11-29 05:53:41,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 315 transitions, 4112 flow [2023-11-29 05:53:41,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:53:41,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:53:41,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2023-11-29 05:53:41,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2023-11-29 05:53:41,673 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 174 transitions. [2023-11-29 05:53:41,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 174 transitions. [2023-11-29 05:53:41,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:53:41,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 174 transitions. [2023-11-29 05:53:41,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 29.0) internal successors, (174), 6 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) [2023-11-29 05:53:41,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:53:41,675 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:53:41,675 INFO L175 Difference]: Start difference. First operand has 225 places, 250 transitions, 2818 flow. Second operand 6 states and 174 transitions. [2023-11-29 05:53:41,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 315 transitions, 4112 flow [2023-11-29 05:53:41,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 315 transitions, 3990 flow, removed 56 selfloop flow, removed 1 redundant places. [2023-11-29 05:53:41,796 INFO L231 Difference]: Finished difference. Result has 232 places, 281 transitions, 3321 flow [2023-11-29 05:53:41,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2734, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3321, PETRI_PLACES=232, PETRI_TRANSITIONS=281} [2023-11-29 05:53:41,797 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 185 predicate places. [2023-11-29 05:53:41,797 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 281 transitions, 3321 flow [2023-11-29 05:53:41,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 24.0) internal successors, (216), 9 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) [2023-11-29 05:53:41,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:53:41,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:53:41,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/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)] Forceful destruction successful, exit code 0 [2023-11-29 05:53:41,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:53:41,998 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 05:53:41,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:53:41,998 INFO L85 PathProgramCache]: Analyzing trace with hash 209436163, now seen corresponding path program 3 times [2023-11-29 05:53:41,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:53:41,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1946803835] [2023-11-29 05:53:41,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:53:41,999 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:53:41,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:53:42,000 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:53:42,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-11-29 05:53:42,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 05:53:42,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:53:42,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 05:53:42,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:53:42,901 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:53:42,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 40 [2023-11-29 05:53:43,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:53:43,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:53:44,017 INFO L349 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-11-29 05:53:44,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 183 treesize of output 91 [2023-11-29 05:53:52,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:53:52,766 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:53:52,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1946803835] [2023-11-29 05:53:52,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1946803835] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:53:52,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:53:52,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2023-11-29 05:53:52,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068675960] [2023-11-29 05:53:52,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:53:52,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:53:52,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:53:52,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:53:52,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:53:53,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 46 [2023-11-29 05:53:53,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 281 transitions, 3321 flow. Second operand has 12 states, 12 states have (on average 24.166666666666668) internal successors, (290), 12 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:53:53,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:53:53,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 46 [2023-11-29 05:53:53,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:53:58,210 INFO L124 PetriNetUnfolderBase]: 5089/9573 cut-off events. [2023-11-29 05:53:58,211 INFO L125 PetriNetUnfolderBase]: For 84944/85559 co-relation queries the response was YES. [2023-11-29 05:53:58,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53645 conditions, 9573 events. 5089/9573 cut-off events. For 84944/85559 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 63977 event pairs, 1900 based on Foata normal form. 186/9589 useless extension candidates. Maximal degree in co-relation 53566. Up to 7381 conditions per place. [2023-11-29 05:53:58,369 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 215 selfloop transitions, 79 changer transitions 12/333 dead transitions. [2023-11-29 05:53:58,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 333 transitions, 4422 flow [2023-11-29 05:53:58,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:53:58,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:53:58,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2023-11-29 05:53:58,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6149068322981367 [2023-11-29 05:53:58,371 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 198 transitions. [2023-11-29 05:53:58,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 198 transitions. [2023-11-29 05:53:58,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:53:58,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 198 transitions. [2023-11-29 05:53:58,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 28.285714285714285) internal successors, (198), 7 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:53:58,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 46.0) internal successors, (368), 8 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:53:58,372 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 46.0) internal successors, (368), 8 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:53:58,372 INFO L175 Difference]: Start difference. First operand has 232 places, 281 transitions, 3321 flow. Second operand 7 states and 198 transitions. [2023-11-29 05:53:58,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 333 transitions, 4422 flow [2023-11-29 05:53:58,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 333 transitions, 4304 flow, removed 20 selfloop flow, removed 3 redundant places. [2023-11-29 05:53:58,505 INFO L231 Difference]: Finished difference. Result has 238 places, 297 transitions, 3707 flow [2023-11-29 05:53:58,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3211, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3707, PETRI_PLACES=238, PETRI_TRANSITIONS=297} [2023-11-29 05:53:58,506 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 191 predicate places. [2023-11-29 05:53:58,506 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 297 transitions, 3707 flow [2023-11-29 05:53:58,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 24.166666666666668) internal successors, (290), 12 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:53:58,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:53:58,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:53:58,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/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)] Forceful destruction successful, exit code 0 [2023-11-29 05:53:58,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:53:58,707 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 05:53:58,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:53:58,707 INFO L85 PathProgramCache]: Analyzing trace with hash -559329197, now seen corresponding path program 4 times [2023-11-29 05:53:58,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:53:58,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [503493907] [2023-11-29 05:53:58,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:53:58,708 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:53:58,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:53:58,709 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:53:58,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-11-29 05:53:58,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:53:58,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:53:58,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 05:53:58,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:53:59,228 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:53:59,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 161 treesize of output 51 [2023-11-29 05:53:59,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:53:59,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:53:59,985 INFO L349 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-11-29 05:53:59,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 226 treesize of output 99 [2023-11-29 05:54:08,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:54:08,528 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:54:08,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [503493907] [2023-11-29 05:54:08,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [503493907] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:54:08,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:54:08,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-29 05:54:08,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260657621] [2023-11-29 05:54:08,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:54:08,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:54:08,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:54:08,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:54:08,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:54:11,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 46 [2023-11-29 05:54:11,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 297 transitions, 3707 flow. Second operand has 9 states, 9 states have (on average 23.666666666666668) internal successors, (213), 9 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:54:11,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:54:11,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 46 [2023-11-29 05:54:11,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:54:22,608 INFO L124 PetriNetUnfolderBase]: 5285/9936 cut-off events. [2023-11-29 05:54:22,608 INFO L125 PetriNetUnfolderBase]: For 97380/98080 co-relation queries the response was YES. [2023-11-29 05:54:22,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56675 conditions, 9936 events. 5285/9936 cut-off events. For 97380/98080 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 67328 event pairs, 1831 based on Foata normal form. 223/9901 useless extension candidates. Maximal degree in co-relation 56594. Up to 7662 conditions per place. [2023-11-29 05:54:22,767 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 251 selfloop transitions, 48 changer transitions 12/338 dead transitions. [2023-11-29 05:54:22,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 338 transitions, 4712 flow [2023-11-29 05:54:22,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:54:22,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:54:22,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2023-11-29 05:54:22,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2023-11-29 05:54:22,769 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 176 transitions. [2023-11-29 05:54:22,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 176 transitions. [2023-11-29 05:54:22,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:54:22,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 176 transitions. [2023-11-29 05:54:22,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 29.333333333333332) internal successors, (176), 6 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:54:22,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:54:22,771 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:54:22,771 INFO L175 Difference]: Start difference. First operand has 238 places, 297 transitions, 3707 flow. Second operand 6 states and 176 transitions. [2023-11-29 05:54:22,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 338 transitions, 4712 flow [2023-11-29 05:54:22,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 338 transitions, 4629 flow, removed 30 selfloop flow, removed 1 redundant places. [2023-11-29 05:54:22,943 INFO L231 Difference]: Finished difference. Result has 244 places, 300 transitions, 3815 flow [2023-11-29 05:54:22,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3628, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3815, PETRI_PLACES=244, PETRI_TRANSITIONS=300} [2023-11-29 05:54:22,944 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 197 predicate places. [2023-11-29 05:54:22,945 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 300 transitions, 3815 flow [2023-11-29 05:54:22,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 23.666666666666668) internal successors, (213), 9 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:54:22,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:54:22,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:54:22,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/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 [2023-11-29 05:54:23,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:54:23,146 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 05:54:23,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:54:23,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1027113163, now seen corresponding path program 5 times [2023-11-29 05:54:23,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:54:23,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [213992452] [2023-11-29 05:54:23,146 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:54:23,147 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:54:23,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:54:23,148 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:54:23,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-11-29 05:54:23,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:54:23,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:54:23,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 05:54:23,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:54:23,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 1 [2023-11-29 05:54:24,189 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:54:24,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 40 [2023-11-29 05:54:24,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:54:24,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:54:26,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 627 treesize of output 595 [2023-11-29 05:54:28,402 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:54:28,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2903703993 treesize of output 2786263481 [2023-11-29 05:54:33,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:54:33,564 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:54:33,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [213992452] [2023-11-29 05:54:33,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [213992452] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:54:33,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:54:33,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2023-11-29 05:54:33,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157172076] [2023-11-29 05:54:33,565 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:54:33,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 05:54:33,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:54:33,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 05:54:33,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:54:34,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 46 [2023-11-29 05:54:34,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 300 transitions, 3815 flow. Second operand has 15 states, 15 states have (on average 23.533333333333335) internal successors, (353), 15 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:54:34,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:54:34,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 46 [2023-11-29 05:54:34,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:54:38,389 INFO L124 PetriNetUnfolderBase]: 5321/10061 cut-off events. [2023-11-29 05:54:38,389 INFO L125 PetriNetUnfolderBase]: For 101742/102337 co-relation queries the response was YES. [2023-11-29 05:54:38,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58194 conditions, 10061 events. 5321/10061 cut-off events. For 101742/102337 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 68501 event pairs, 1961 based on Foata normal form. 175/10078 useless extension candidates. Maximal degree in co-relation 58110. Up to 7777 conditions per place. [2023-11-29 05:54:38,529 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 232 selfloop transitions, 68 changer transitions 11/338 dead transitions. [2023-11-29 05:54:38,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 338 transitions, 4828 flow [2023-11-29 05:54:38,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:54:38,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 05:54:38,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2023-11-29 05:54:38,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5896739130434783 [2023-11-29 05:54:38,531 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 217 transitions. [2023-11-29 05:54:38,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 217 transitions. [2023-11-29 05:54:38,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:54:38,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 217 transitions. [2023-11-29 05:54:38,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 27.125) internal successors, (217), 8 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:54:38,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 46.0) internal successors, (414), 9 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:54:38,532 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 46.0) internal successors, (414), 9 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:54:38,533 INFO L175 Difference]: Start difference. First operand has 244 places, 300 transitions, 3815 flow. Second operand 8 states and 217 transitions. [2023-11-29 05:54:38,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 338 transitions, 4828 flow [2023-11-29 05:54:38,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 338 transitions, 4729 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-11-29 05:54:38,697 INFO L231 Difference]: Finished difference. Result has 250 places, 306 transitions, 4038 flow [2023-11-29 05:54:38,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3716, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4038, PETRI_PLACES=250, PETRI_TRANSITIONS=306} [2023-11-29 05:54:38,698 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 203 predicate places. [2023-11-29 05:54:38,698 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 306 transitions, 4038 flow [2023-11-29 05:54:38,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 23.533333333333335) internal successors, (353), 15 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:54:38,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:54:38,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:54:38,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2023-11-29 05:54:38,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:54:38,898 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 05:54:38,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:54:38,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1079770755, now seen corresponding path program 6 times [2023-11-29 05:54:38,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:54:38,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1980982500] [2023-11-29 05:54:38,899 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:54:38,899 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:54:38,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:54:38,900 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:54:38,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-11-29 05:54:39,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 05:54:39,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:54:39,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 05:54:39,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:54:39,568 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:54:39,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 40 [2023-11-29 05:54:39,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:54:39,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:54:40,283 INFO L349 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2023-11-29 05:54:40,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 170 treesize of output 83 [2023-11-29 05:54:44,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:54:44,005 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:54:44,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1980982500] [2023-11-29 05:54:44,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1980982500] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:54:44,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:54:44,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-29 05:54:44,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198188795] [2023-11-29 05:54:44,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:54:44,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:54:44,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:54:44,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:54:44,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:54:44,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 46 [2023-11-29 05:54:44,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 306 transitions, 4038 flow. Second operand has 9 states, 9 states have (on average 23.555555555555557) internal successors, (212), 9 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:54:44,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:54:44,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 46 [2023-11-29 05:54:44,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:54:51,304 INFO L124 PetriNetUnfolderBase]: 5154/9612 cut-off events. [2023-11-29 05:54:51,305 INFO L125 PetriNetUnfolderBase]: For 110331/111117 co-relation queries the response was YES. [2023-11-29 05:54:51,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56994 conditions, 9612 events. 5154/9612 cut-off events. For 110331/111117 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 65239 event pairs, 1814 based on Foata normal form. 266/9654 useless extension candidates. Maximal degree in co-relation 56907. Up to 7366 conditions per place. [2023-11-29 05:54:51,463 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 254 selfloop transitions, 57 changer transitions 16/352 dead transitions. [2023-11-29 05:54:51,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 352 transitions, 5211 flow [2023-11-29 05:54:51,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:54:51,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:54:51,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2023-11-29 05:54:51,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2023-11-29 05:54:51,466 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 176 transitions. [2023-11-29 05:54:51,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 176 transitions. [2023-11-29 05:54:51,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:54:51,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 176 transitions. [2023-11-29 05:54:51,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 29.333333333333332) internal successors, (176), 6 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:54:51,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:54:51,467 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:54:51,467 INFO L175 Difference]: Start difference. First operand has 250 places, 306 transitions, 4038 flow. Second operand 6 states and 176 transitions. [2023-11-29 05:54:51,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 352 transitions, 5211 flow [2023-11-29 05:54:51,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 352 transitions, 5109 flow, removed 33 selfloop flow, removed 3 redundant places. [2023-11-29 05:54:51,621 INFO L231 Difference]: Finished difference. Result has 255 places, 311 transitions, 4302 flow [2023-11-29 05:54:51,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3936, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4302, PETRI_PLACES=255, PETRI_TRANSITIONS=311} [2023-11-29 05:54:51,621 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 208 predicate places. [2023-11-29 05:54:51,621 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 311 transitions, 4302 flow [2023-11-29 05:54:51,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 23.555555555555557) internal successors, (212), 9 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:54:51,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:54:51,622 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:54:51,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2023-11-29 05:54:51,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:54:51,822 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 05:54:51,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:54:51,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1440821776, now seen corresponding path program 3 times [2023-11-29 05:54:51,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:54:51,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1447231727] [2023-11-29 05:54:51,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:54:51,823 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:54:51,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:54:51,824 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:54:51,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-11-29 05:54:52,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 05:54:52,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:54:52,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 05:54:52,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:54:52,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 05:54:52,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:54:52,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:54:52,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:54:52,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:54:52,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:54:52,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:54:52,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:54:52,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:54:52,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:54:52,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:54:54,541 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:54:54,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:55:10,525 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 05:55:10,525 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:55:10,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1447231727] [2023-11-29 05:55:10,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1447231727] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:55:10,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:55:10,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2023-11-29 05:55:10,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641744045] [2023-11-29 05:55:10,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:55:10,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 05:55:10,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:55:10,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 05:55:10,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=308, Unknown=2, NotChecked=0, Total=380 [2023-11-29 05:55:31,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2023-11-29 05:55:31,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 311 transitions, 4302 flow. Second operand has 20 states, 20 states have (on average 21.9) internal successors, (438), 20 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:55:31,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:55:31,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2023-11-29 05:55:31,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:55:44,108 INFO L124 PetriNetUnfolderBase]: 4814/8871 cut-off events. [2023-11-29 05:55:44,108 INFO L125 PetriNetUnfolderBase]: For 116076/116949 co-relation queries the response was YES. [2023-11-29 05:55:44,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53890 conditions, 8871 events. 4814/8871 cut-off events. For 116076/116949 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 58569 event pairs, 1991 based on Foata normal form. 313/8925 useless extension candidates. Maximal degree in co-relation 53799. Up to 4167 conditions per place. [2023-11-29 05:55:44,232 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 373 selfloop transitions, 117 changer transitions 0/514 dead transitions. [2023-11-29 05:55:44,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 514 transitions, 8105 flow [2023-11-29 05:55:44,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 05:55:44,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 05:55:44,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 320 transitions. [2023-11-29 05:55:44,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5797101449275363 [2023-11-29 05:55:44,236 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 320 transitions. [2023-11-29 05:55:44,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 320 transitions. [2023-11-29 05:55:44,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:55:44,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 320 transitions. [2023-11-29 05:55:44,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 26.666666666666668) internal successors, (320), 12 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:55:44,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 46.0) internal successors, (598), 13 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:55:44,238 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 46.0) internal successors, (598), 13 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:55:44,238 INFO L175 Difference]: Start difference. First operand has 255 places, 311 transitions, 4302 flow. Second operand 12 states and 320 transitions. [2023-11-29 05:55:44,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 514 transitions, 8105 flow [2023-11-29 05:55:44,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 514 transitions, 7882 flow, removed 95 selfloop flow, removed 1 redundant places. [2023-11-29 05:55:44,411 INFO L231 Difference]: Finished difference. Result has 257 places, 341 transitions, 5009 flow [2023-11-29 05:55:44,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4170, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5009, PETRI_PLACES=257, PETRI_TRANSITIONS=341} [2023-11-29 05:55:44,412 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 210 predicate places. [2023-11-29 05:55:44,412 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 341 transitions, 5009 flow [2023-11-29 05:55:44,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 21.9) internal successors, (438), 20 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:55:44,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:55:44,413 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:55:44,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2023-11-29 05:55:44,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:55:44,613 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 05:55:44,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:55:44,614 INFO L85 PathProgramCache]: Analyzing trace with hash 2092860916, now seen corresponding path program 4 times [2023-11-29 05:55:44,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:55:44,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [858112893] [2023-11-29 05:55:44,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:55:44,614 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:55:44,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:55:44,615 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:55:44,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-11-29 05:55:44,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:55:44,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:55:44,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 05:55:44,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:55:44,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-29 05:55:44,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:55:44,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:55:44,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:55:44,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:55:44,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:55:44,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:55:44,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:55:44,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:55:44,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:55:44,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:55:46,557 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 05:55:46,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:55:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 05:55:50,158 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:55:50,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [858112893] [2023-11-29 05:55:50,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [858112893] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:55:50,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:55:50,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2023-11-29 05:55:50,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460588365] [2023-11-29 05:55:50,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:55:50,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 05:55:50,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:55:50,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 05:55:50,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:55:59,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2023-11-29 05:55:59,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 341 transitions, 5009 flow. Second operand has 20 states, 20 states have (on average 22.2) internal successors, (444), 20 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:55:59,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:55:59,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2023-11-29 05:55:59,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:56:22,347 INFO L124 PetriNetUnfolderBase]: 10018/16307 cut-off events. [2023-11-29 05:56:22,347 INFO L125 PetriNetUnfolderBase]: For 238334/240171 co-relation queries the response was YES. [2023-11-29 05:56:22,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104762 conditions, 16307 events. 10018/16307 cut-off events. For 238334/240171 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 100392 event pairs, 1229 based on Foata normal form. 1500/17340 useless extension candidates. Maximal degree in co-relation 104665. Up to 4938 conditions per place. [2023-11-29 05:56:22,700 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 1413 selfloop transitions, 102 changer transitions 6/1540 dead transitions. [2023-11-29 05:56:22,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 1540 transitions, 24008 flow [2023-11-29 05:56:22,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 05:56:22,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-29 05:56:22,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 716 transitions. [2023-11-29 05:56:22,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6226086956521739 [2023-11-29 05:56:22,703 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 716 transitions. [2023-11-29 05:56:22,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 716 transitions. [2023-11-29 05:56:22,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:56:22,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 716 transitions. [2023-11-29 05:56:22,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 28.64) internal successors, (716), 25 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:56:22,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 46.0) internal successors, (1196), 26 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:56:22,705 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 46.0) internal successors, (1196), 26 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:56:22,705 INFO L175 Difference]: Start difference. First operand has 257 places, 341 transitions, 5009 flow. Second operand 25 states and 716 transitions. [2023-11-29 05:56:22,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 1540 transitions, 24008 flow [2023-11-29 05:56:23,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 1540 transitions, 23837 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-29 05:56:23,019 INFO L231 Difference]: Finished difference. Result has 283 places, 368 transitions, 5462 flow [2023-11-29 05:56:23,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4875, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5462, PETRI_PLACES=283, PETRI_TRANSITIONS=368} [2023-11-29 05:56:23,019 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 236 predicate places. [2023-11-29 05:56:23,020 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 368 transitions, 5462 flow [2023-11-29 05:56:23,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 22.2) internal successors, (444), 20 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:56:23,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:56:23,020 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:56:23,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2023-11-29 05:56:23,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:56:23,220 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 05:56:23,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:56:23,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1171217766, now seen corresponding path program 7 times [2023-11-29 05:56:23,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:56:23,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1932605169] [2023-11-29 05:56:23,221 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:56:23,221 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:56:23,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:56:23,222 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:56:23,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2023-11-29 05:56:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:56:23,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:56:23,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:56:23,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 05:56:23,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:56:23,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:56:23,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:56:23,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 05:56:23,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:56:23,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:56:23,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:56:23,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:56:23,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:56:23,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:56:23,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 05:56:24,489 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 05:56:24,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:56:25,343 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 05:56:25,343 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:56:25,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1932605169] [2023-11-29 05:56:25,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1932605169] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:56:25,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:56:25,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-29 05:56:25,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041482236] [2023-11-29 05:56:25,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:56:25,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 05:56:25,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:56:25,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 05:56:25,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:56:27,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2023-11-29 05:56:27,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 368 transitions, 5462 flow. Second operand has 14 states, 14 states have (on average 21.642857142857142) internal successors, (303), 14 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:56:27,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:56:27,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2023-11-29 05:56:27,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:56:33,179 INFO L124 PetriNetUnfolderBase]: 9447/15664 cut-off events. [2023-11-29 05:56:33,179 INFO L125 PetriNetUnfolderBase]: For 222090/223918 co-relation queries the response was YES. [2023-11-29 05:56:33,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105508 conditions, 15664 events. 9447/15664 cut-off events. For 222090/223918 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 94793 event pairs, 2344 based on Foata normal form. 891/16322 useless extension candidates. Maximal degree in co-relation 105403. Up to 7424 conditions per place. [2023-11-29 05:56:33,412 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 446 selfloop transitions, 54 changer transitions 9/527 dead transitions. [2023-11-29 05:56:33,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 527 transitions, 8619 flow [2023-11-29 05:56:33,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 05:56:33,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 05:56:33,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 359 transitions. [2023-11-29 05:56:33,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574534161490683 [2023-11-29 05:56:33,414 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 359 transitions. [2023-11-29 05:56:33,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 359 transitions. [2023-11-29 05:56:33,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:56:33,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 359 transitions. [2023-11-29 05:56:33,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 25.642857142857142) internal successors, (359), 14 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:56:33,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 46.0) internal successors, (690), 15 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:56:33,417 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 46.0) internal successors, (690), 15 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:56:33,417 INFO L175 Difference]: Start difference. First operand has 283 places, 368 transitions, 5462 flow. Second operand 14 states and 359 transitions. [2023-11-29 05:56:33,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 527 transitions, 8619 flow [2023-11-29 05:56:33,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 527 transitions, 8303 flow, removed 76 selfloop flow, removed 10 redundant places. [2023-11-29 05:56:33,855 INFO L231 Difference]: Finished difference. Result has 285 places, 366 transitions, 5378 flow [2023-11-29 05:56:33,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5262, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5378, PETRI_PLACES=285, PETRI_TRANSITIONS=366} [2023-11-29 05:56:33,857 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 238 predicate places. [2023-11-29 05:56:33,857 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 366 transitions, 5378 flow [2023-11-29 05:56:33,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 21.642857142857142) internal successors, (303), 14 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:56:33,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:56:33,857 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:56:33,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2023-11-29 05:56:34,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:56:34,059 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 05:56:34,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:56:34,060 INFO L85 PathProgramCache]: Analyzing trace with hash -109237137, now seen corresponding path program 8 times [2023-11-29 05:56:34,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:56:34,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [95993619] [2023-11-29 05:56:34,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:56:34,060 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:56:34,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:56:34,061 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:56:34,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2023-11-29 05:56:34,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:56:34,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:56:34,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:56:34,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:56:34,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-29 05:56:34,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:56:34,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 05:56:34,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:56:34,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:56:34,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:56:34,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:56:34,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:56:34,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:56:34,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:56:34,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:56:34,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 05:56:35,543 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:56:35,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:56:36,461 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:56:36,461 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:56:36,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [95993619] [2023-11-29 05:56:36,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [95993619] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:56:36,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:56:36,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-29 05:56:36,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328617051] [2023-11-29 05:56:36,461 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:56:36,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 05:56:36,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:56:36,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 05:56:36,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:56:38,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2023-11-29 05:56:38,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 366 transitions, 5378 flow. Second operand has 14 states, 14 states have (on average 22.0) internal successors, (308), 14 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:56:38,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:56:38,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2023-11-29 05:56:38,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:56:44,405 INFO L124 PetriNetUnfolderBase]: 9021/14753 cut-off events. [2023-11-29 05:56:44,405 INFO L125 PetriNetUnfolderBase]: For 235205/236733 co-relation queries the response was YES. [2023-11-29 05:56:44,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98781 conditions, 14753 events. 9021/14753 cut-off events. For 235205/236733 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 87724 event pairs, 2234 based on Foata normal form. 959/15385 useless extension candidates. Maximal degree in co-relation 98677. Up to 7106 conditions per place. [2023-11-29 05:56:44,615 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 443 selfloop transitions, 51 changer transitions 6/519 dead transitions. [2023-11-29 05:56:44,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 519 transitions, 8467 flow [2023-11-29 05:56:44,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 05:56:44,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 05:56:44,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 354 transitions. [2023-11-29 05:56:44,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5496894409937888 [2023-11-29 05:56:44,617 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 354 transitions. [2023-11-29 05:56:44,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 354 transitions. [2023-11-29 05:56:44,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:56:44,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 354 transitions. [2023-11-29 05:56:44,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 25.285714285714285) internal successors, (354), 14 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:56:44,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 46.0) internal successors, (690), 15 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:56:44,618 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 46.0) internal successors, (690), 15 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:56:44,619 INFO L175 Difference]: Start difference. First operand has 285 places, 366 transitions, 5378 flow. Second operand 14 states and 354 transitions. [2023-11-29 05:56:44,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 519 transitions, 8467 flow [2023-11-29 05:56:44,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 519 transitions, 8301 flow, removed 6 selfloop flow, removed 11 redundant places. [2023-11-29 05:56:44,952 INFO L231 Difference]: Finished difference. Result has 286 places, 364 transitions, 5367 flow [2023-11-29 05:56:44,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5257, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5367, PETRI_PLACES=286, PETRI_TRANSITIONS=364} [2023-11-29 05:56:44,953 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 239 predicate places. [2023-11-29 05:56:44,953 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 364 transitions, 5367 flow [2023-11-29 05:56:44,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 22.0) internal successors, (308), 14 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:56:44,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:56:44,953 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:56:44,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Ended with exit code 0 [2023-11-29 05:56:45,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:56:45,154 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-29 05:56:45,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:56:45,154 INFO L85 PathProgramCache]: Analyzing trace with hash -417410439, now seen corresponding path program 9 times [2023-11-29 05:56:45,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:56:45,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919391587] [2023-11-29 05:56:45,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:56:45,154 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:56:45,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:56:45,155 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 05:56:45,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e857f1d4-3ab6-4033-9841-51c953962d73/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2023-11-29 05:56:45,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 05:56:45,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:56:45,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 05:56:45,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:56:47,019 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:56:47,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 410 treesize of output 112 [2023-11-29 05:56:47,362 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:56:47,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:56:52,199 INFO L349 Elim1Store]: treesize reduction 528, result has 24.2 percent of original size [2023-11-29 05:56:52,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 492 treesize of output 287 [2023-11-29 06:00:39,537 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 06:01:03,337 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 06:02:24,058 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)