./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/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_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/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_d40aba92-beae-4922-9134-b1d1ba005e21/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 39e90898aa78f5642c5c7d6f9df6b2e15e069a046a9465d5d61576c4b07f46b8 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:01:36,791 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:01:36,876 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 02:01:36,881 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:01:36,881 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:01:36,903 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:01:36,903 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:01:36,904 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:01:36,905 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:01:36,905 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:01:36,906 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:01:36,906 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:01:36,907 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:01:36,907 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:01:36,908 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:01:36,908 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:01:36,909 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:01:36,909 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:01:36,910 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:01:36,910 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:01:36,911 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 02:01:36,911 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 02:01:36,912 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 02:01:36,912 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:01:36,913 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 02:01:36,913 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 02:01:36,914 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:01:36,914 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:01:36,915 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:01:36,915 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:01:36,915 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:01:36,916 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:01:36,916 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:01:36,916 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:01:36,916 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:01:36,917 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:01:36,917 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:01:36,917 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:01:36,917 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:01:36,917 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:01:36,917 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:01:36,918 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_d40aba92-beae-4922-9134-b1d1ba005e21/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39e90898aa78f5642c5c7d6f9df6b2e15e069a046a9465d5d61576c4b07f46b8 [2023-11-29 02:01:37,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:01:37,174 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:01:37,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:01:37,178 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:01:37,178 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:01:37,179 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2023-11-29 02:01:39,921 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:01:40,103 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:01:40,103 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2023-11-29 02:01:40,110 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/data/5e2c08716/e966ef5642684f9fa1589be8e5518630/FLAG54a96de15 [2023-11-29 02:01:40,122 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/data/5e2c08716/e966ef5642684f9fa1589be8e5518630 [2023-11-29 02:01:40,124 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:01:40,125 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:01:40,126 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:01:40,127 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:01:40,131 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:01:40,132 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:01:40" (1/1) ... [2023-11-29 02:01:40,133 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@726fa433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:01:40, skipping insertion in model container [2023-11-29 02:01:40,133 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:01:40" (1/1) ... [2023-11-29 02:01:40,159 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:01:40,322 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:01:40,336 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 02:01:40,337 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3344f02b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:01:40, skipping insertion in model container [2023-11-29 02:01:40,337 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:01:40,337 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-29 02:01:40,339 INFO L158 Benchmark]: Toolchain (without parser) took 212.89ms. Allocated memory is still 165.7MB. Free memory was 130.6MB in the beginning and 121.2MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-29 02:01:40,340 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 111.1MB. Free memory is still 85.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 02:01:40,341 INFO L158 Benchmark]: CACSL2BoogieTranslator took 210.91ms. Allocated memory is still 165.7MB. Free memory was 130.6MB in the beginning and 121.2MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-29 02:01:40,342 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 111.1MB. Free memory is still 85.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 210.91ms. Allocated memory is still 165.7MB. Free memory was 130.6MB in the beginning and 121.2MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 116]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/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_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/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_d40aba92-beae-4922-9134-b1d1ba005e21/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 39e90898aa78f5642c5c7d6f9df6b2e15e069a046a9465d5d61576c4b07f46b8 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:01:42,088 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:01:42,168 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-29 02:01:42,174 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:01:42,175 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:01:42,204 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:01:42,204 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:01:42,205 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:01:42,206 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:01:42,207 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:01:42,207 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:01:42,208 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:01:42,209 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:01:42,210 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:01:42,210 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:01:42,211 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:01:42,211 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:01:42,212 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:01:42,212 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:01:42,213 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:01:42,213 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 02:01:42,214 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 02:01:42,214 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 02:01:42,215 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:01:42,215 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 02:01:42,216 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-29 02:01:42,216 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-29 02:01:42,216 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 02:01:42,217 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:01:42,217 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:01:42,218 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:01:42,218 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:01:42,219 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:01:42,219 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:01:42,219 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:01:42,220 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:01:42,220 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:01:42,220 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-29 02:01:42,220 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-29 02:01:42,221 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:01:42,221 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:01:42,221 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:01:42,222 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:01:42,222 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-29 02:01:42,222 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_d40aba92-beae-4922-9134-b1d1ba005e21/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39e90898aa78f5642c5c7d6f9df6b2e15e069a046a9465d5d61576c4b07f46b8 [2023-11-29 02:01:42,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:01:42,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:01:42,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:01:42,551 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:01:42,551 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:01:42,553 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2023-11-29 02:01:45,308 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:01:45,484 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:01:45,485 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2023-11-29 02:01:45,492 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/data/46c6f0713/583fdd1306434174a46f1eb128271b06/FLAGfc0ddfe23 [2023-11-29 02:01:45,508 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/data/46c6f0713/583fdd1306434174a46f1eb128271b06 [2023-11-29 02:01:45,510 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:01:45,512 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:01:45,514 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:01:45,514 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:01:45,519 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:01:45,520 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:01:45" (1/1) ... [2023-11-29 02:01:45,521 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bf55a7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:01:45, skipping insertion in model container [2023-11-29 02:01:45,521 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:01:45" (1/1) ... [2023-11-29 02:01:45,549 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:01:45,753 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:01:45,767 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-29 02:01:45,772 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:01:45,793 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:01:45,798 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:01:45,828 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:01:45,839 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:01:45,839 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:01:45,847 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:01:45,848 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:01:45 WrapperNode [2023-11-29 02:01:45,848 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:01:45,849 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:01:45,849 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:01:45,849 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:01:45,857 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:01:45" (1/1) ... [2023-11-29 02:01:45,869 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:01:45" (1/1) ... [2023-11-29 02:01:45,901 INFO L138 Inliner]: procedures = 28, calls = 56, calls flagged for inlining = 17, calls inlined = 23, statements flattened = 284 [2023-11-29 02:01:45,901 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:01:45,902 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:01:45,902 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:01:45,902 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:01:45,914 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:01:45" (1/1) ... [2023-11-29 02:01:45,914 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:01:45" (1/1) ... [2023-11-29 02:01:45,920 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:01:45" (1/1) ... [2023-11-29 02:01:45,942 INFO L175 MemorySlicer]: Split 19 memory accesses to 5 slices as follows [2, 2, 11, 2, 2]. 58 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 5 writes are split as follows [0, 1, 2, 1, 1]. [2023-11-29 02:01:45,942 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:01:45" (1/1) ... [2023-11-29 02:01:45,942 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:01:45" (1/1) ... [2023-11-29 02:01:45,968 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:01:45" (1/1) ... [2023-11-29 02:01:45,974 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:01:45" (1/1) ... [2023-11-29 02:01:45,977 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:01:45" (1/1) ... [2023-11-29 02:01:45,980 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:01:45" (1/1) ... [2023-11-29 02:01:45,986 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:01:45,987 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:01:45,987 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:01:45,987 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:01:45,988 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:01:45" (1/1) ... [2023-11-29 02:01:45,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:01:46,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:01:46,021 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:01:46,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:01:46,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:01:46,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-29 02:01:46,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-29 02:01:46,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-29 02:01:46,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-29 02:01:46,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2023-11-29 02:01:46,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 02:01:46,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-29 02:01:46,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-29 02:01:46,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-29 02:01:46,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-29 02:01:46,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2023-11-29 02:01:46,058 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 02:01:46,058 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 02:01:46,058 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 02:01:46,058 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 02:01:46,059 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 02:01:46,059 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 02:01:46,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 02:01:46,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 02:01:46,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 02:01:46,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:01:46,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:01:46,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 02:01:46,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-29 02:01:46,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-29 02:01:46,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-29 02:01:46,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-29 02:01:46,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#4 [2023-11-29 02:01:46,062 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 02:01:46,204 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:01:46,205 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:01:46,904 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:01:47,323 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:01:47,323 INFO L309 CfgBuilder]: Removed 8 assume(true) statements. [2023-11-29 02:01:47,323 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:01:47 BoogieIcfgContainer [2023-11-29 02:01:47,323 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:01:47,326 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:01:47,326 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:01:47,329 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:01:47,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:01:45" (1/3) ... [2023-11-29 02:01:47,330 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fa3e0f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:01:47, skipping insertion in model container [2023-11-29 02:01:47,330 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:01:45" (2/3) ... [2023-11-29 02:01:47,330 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fa3e0f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:01:47, skipping insertion in model container [2023-11-29 02:01:47,330 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:01:47" (3/3) ... [2023-11-29 02:01:47,332 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product.wvr.c [2023-11-29 02:01:47,351 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:01:47,351 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 36 error locations. [2023-11-29 02:01:47,352 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 02:01:47,489 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 02:01:47,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 99 transitions, 219 flow [2023-11-29 02:01:47,563 INFO L124 PetriNetUnfolderBase]: 11/96 cut-off events. [2023-11-29 02:01:47,563 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 02:01:47,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 96 events. 11/96 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 276 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 69. Up to 2 conditions per place. [2023-11-29 02:01:47,567 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 99 transitions, 219 flow [2023-11-29 02:01:47,572 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 95 transitions, 208 flow [2023-11-29 02:01:47,582 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:01:47,588 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;@6610c178, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:01:47,588 INFO L358 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2023-11-29 02:01:47,591 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 02:01:47,591 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-29 02:01:47,591 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 02:01:47,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:01:47,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 02:01:47,592 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-29 02:01:47,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:01:47,597 INFO L85 PathProgramCache]: Analyzing trace with hash 894978, now seen corresponding path program 1 times [2023-11-29 02:01:47,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:01:47,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1400965191] [2023-11-29 02:01:47,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:01:47,606 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 02:01:47,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:01:47,607 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:01:47,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:01:47,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:01:47,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 02:01:47,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:01:47,776 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 02:01:47,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:47,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:01:47,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:47,822 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 02:01:47,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:47,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:01:47,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:47,838 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 02:01:47,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:47,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:01:47,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:47,871 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 02:01:47,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:47,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:01:47,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:47,900 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 02:01:47,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:47,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:01:47,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:47,930 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 02:01:47,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:47,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 02:01:47,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:47,975 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 02:01:47,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:47,983 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 11 treesize of output 1 [2023-11-29 02:01:47,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:47,990 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 02:01:47,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:47,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:01:48,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:48,004 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 02:01:48,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:48,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:01:48,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:48,022 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 02:01:48,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:48,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:01:48,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:48,036 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 02:01:48,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:48,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:01:48,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:48,060 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 02:01:48,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:48,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:01:48,077 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 02:01:48,077 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:01:48,078 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:01:48,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1400965191] [2023-11-29 02:01:48,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1400965191] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:01:48,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:01:48,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:01:48,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210206135] [2023-11-29 02:01:48,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:01:48,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:01:48,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:01:48,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:01:48,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:01:48,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 99 [2023-11-29 02:01:48,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 95 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:48,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:01:48,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 99 [2023-11-29 02:01:48,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:01:49,400 INFO L124 PetriNetUnfolderBase]: 4704/7866 cut-off events. [2023-11-29 02:01:49,400 INFO L125 PetriNetUnfolderBase]: For 364/365 co-relation queries the response was YES. [2023-11-29 02:01:49,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14583 conditions, 7866 events. 4704/7866 cut-off events. For 364/365 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 55153 event pairs, 3616 based on Foata normal form. 544/5753 useless extension candidates. Maximal degree in co-relation 14373. Up to 6434 conditions per place. [2023-11-29 02:01:49,469 INFO L140 encePairwiseOnDemand]: 91/99 looper letters, 45 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-11-29 02:01:49,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 88 transitions, 288 flow [2023-11-29 02:01:49,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:01:49,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:01:49,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 188 transitions. [2023-11-29 02:01:49,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.632996632996633 [2023-11-29 02:01:49,482 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 188 transitions. [2023-11-29 02:01:49,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 188 transitions. [2023-11-29 02:01:49,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:01:49,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 188 transitions. [2023-11-29 02:01:49,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:49,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:49,493 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:49,495 INFO L175 Difference]: Start difference. First operand has 94 places, 95 transitions, 208 flow. Second operand 3 states and 188 transitions. [2023-11-29 02:01:49,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 88 transitions, 288 flow [2023-11-29 02:01:49,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 88 transitions, 276 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 02:01:49,505 INFO L231 Difference]: Finished difference. Result has 86 places, 88 transitions, 186 flow [2023-11-29 02:01:49,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=86, PETRI_TRANSITIONS=88} [2023-11-29 02:01:49,510 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, -8 predicate places. [2023-11-29 02:01:49,510 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 88 transitions, 186 flow [2023-11-29 02:01:49,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:49,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:01:49,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 02:01:49,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:01:49,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:01:49,712 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-29 02:01:49,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:01:49,713 INFO L85 PathProgramCache]: Analyzing trace with hash 894979, now seen corresponding path program 1 times [2023-11-29 02:01:49,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:01:49,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [648865219] [2023-11-29 02:01:49,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:01:49,715 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 02:01:49,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:01:49,716 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:01:49,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:01:49,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:01:49,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 02:01:49,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:01:49,834 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 02:01:49,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:49,847 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 02:01:49,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:49,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:01:49,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:49,882 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 02:01:49,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:49,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:01:49,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:49,903 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 02:01:49,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:49,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:01:49,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:49,942 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 02:01:49,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:49,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 02:01:49,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:49,998 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 02:01:50,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:50,022 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 02:01:50,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:50,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:01:50,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:50,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:01:50,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:50,058 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 02:01:50,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:50,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:01:50,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:50,091 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 02:01:50,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:50,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:01:50,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:50,111 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 02:01:50,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:50,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:01:50,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:50,133 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 02:01:50,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:50,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:01:50,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:50,152 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 02:01:50,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:50,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:01:50,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:50,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:01:50,259 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 02:01:50,259 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:01:50,260 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:01:50,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [648865219] [2023-11-29 02:01:50,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [648865219] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:01:50,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:01:50,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:01:50,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369442484] [2023-11-29 02:01:50,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:01:50,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:01:50,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:01:50,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:01:50,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:01:50,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 99 [2023-11-29 02:01:50,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 88 transitions, 186 flow. Second operand has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:50,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:01:50,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 99 [2023-11-29 02:01:50,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:01:51,990 INFO L124 PetriNetUnfolderBase]: 4706/7872 cut-off events. [2023-11-29 02:01:51,990 INFO L125 PetriNetUnfolderBase]: For 91/92 co-relation queries the response was YES. [2023-11-29 02:01:52,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14416 conditions, 7872 events. 4706/7872 cut-off events. For 91/92 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 55150 event pairs, 3616 based on Foata normal form. 0/5213 useless extension candidates. Maximal degree in co-relation 14380. Up to 6443 conditions per place. [2023-11-29 02:01:52,057 INFO L140 encePairwiseOnDemand]: 90/99 looper letters, 48 selfloop transitions, 7 changer transitions 0/94 dead transitions. [2023-11-29 02:01:52,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 94 transitions, 310 flow [2023-11-29 02:01:52,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:01:52,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:01:52,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 237 transitions. [2023-11-29 02:01:52,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5984848484848485 [2023-11-29 02:01:52,061 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 237 transitions. [2023-11-29 02:01:52,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 237 transitions. [2023-11-29 02:01:52,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:01:52,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 237 transitions. [2023-11-29 02:01:52,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 59.25) internal successors, (237), 4 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:52,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 99.0) internal successors, (495), 5 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:52,066 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 99.0) internal successors, (495), 5 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:52,067 INFO L175 Difference]: Start difference. First operand has 86 places, 88 transitions, 186 flow. Second operand 4 states and 237 transitions. [2023-11-29 02:01:52,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 94 transitions, 310 flow [2023-11-29 02:01:52,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 94 transitions, 304 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:01:52,071 INFO L231 Difference]: Finished difference. Result has 90 places, 94 transitions, 238 flow [2023-11-29 02:01:52,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=238, PETRI_PLACES=90, PETRI_TRANSITIONS=94} [2023-11-29 02:01:52,072 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, -4 predicate places. [2023-11-29 02:01:52,072 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 94 transitions, 238 flow [2023-11-29 02:01:52,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:52,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:01:52,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-29 02:01:52,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:01:52,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:01:52,274 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-29 02:01:52,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:01:52,274 INFO L85 PathProgramCache]: Analyzing trace with hash 27744896, now seen corresponding path program 1 times [2023-11-29 02:01:52,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:01:52,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1415901871] [2023-11-29 02:01:52,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:01:52,275 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 02:01:52,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:01:52,276 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:01:52,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:01:52,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:01:52,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:01:52,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:01:52,423 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 02:01:52,423 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:01:52,424 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:01:52,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1415901871] [2023-11-29 02:01:52,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1415901871] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:01:52,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:01:52,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:01:52,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68494629] [2023-11-29 02:01:52,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:01:52,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:01:52,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:01:52,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:01:52,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:01:52,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 99 [2023-11-29 02:01:52,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 94 transitions, 238 flow. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:52,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:01:52,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 99 [2023-11-29 02:01:52,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:01:53,560 INFO L124 PetriNetUnfolderBase]: 4706/7877 cut-off events. [2023-11-29 02:01:53,560 INFO L125 PetriNetUnfolderBase]: For 92/93 co-relation queries the response was YES. [2023-11-29 02:01:53,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14451 conditions, 7877 events. 4706/7877 cut-off events. For 92/93 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 55184 event pairs, 3616 based on Foata normal form. 1/5222 useless extension candidates. Maximal degree in co-relation 14391. Up to 6443 conditions per place. [2023-11-29 02:01:53,622 INFO L140 encePairwiseOnDemand]: 95/99 looper letters, 54 selfloop transitions, 3 changer transitions 0/98 dead transitions. [2023-11-29 02:01:53,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 98 transitions, 372 flow [2023-11-29 02:01:53,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:01:53,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:01:53,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 241 transitions. [2023-11-29 02:01:53,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6085858585858586 [2023-11-29 02:01:53,625 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 241 transitions. [2023-11-29 02:01:53,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 241 transitions. [2023-11-29 02:01:53,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:01:53,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 241 transitions. [2023-11-29 02:01:53,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 60.25) internal successors, (241), 4 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:53,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 99.0) internal successors, (495), 5 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:53,629 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 99.0) internal successors, (495), 5 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:53,629 INFO L175 Difference]: Start difference. First operand has 90 places, 94 transitions, 238 flow. Second operand 4 states and 241 transitions. [2023-11-29 02:01:53,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 98 transitions, 372 flow [2023-11-29 02:01:53,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 98 transitions, 372 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 02:01:53,633 INFO L231 Difference]: Finished difference. Result has 94 places, 94 transitions, 249 flow [2023-11-29 02:01:53,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=249, PETRI_PLACES=94, PETRI_TRANSITIONS=94} [2023-11-29 02:01:53,634 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 0 predicate places. [2023-11-29 02:01:53,635 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 94 transitions, 249 flow [2023-11-29 02:01:53,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:53,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:01:53,635 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-29 02:01:53,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:01:53,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:01:53,840 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-29 02:01:53,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:01:53,841 INFO L85 PathProgramCache]: Analyzing trace with hash 860103937, now seen corresponding path program 1 times [2023-11-29 02:01:53,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:01:53,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1355579090] [2023-11-29 02:01:53,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:01:53,841 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 02:01:53,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:01:53,842 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:01:53,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:01:53,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:01:53,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 02:01:53,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:01:53,943 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 02:01:53,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:53,966 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 02:01:53,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:53,975 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 02:01:53,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:53,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:01:53,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:53,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:01:54,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:54,004 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 02:01:54,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:54,016 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 02:01:54,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:54,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:01:54,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:54,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:01:54,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:54,057 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 02:01:54,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:54,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:01:54,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:54,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:01:54,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:54,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:01:54,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:54,100 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 02:01:54,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:54,110 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 02:01:54,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:54,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:01:54,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:54,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:01:54,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:54,153 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 02:01:54,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:54,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:01:54,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:54,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:01:54,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:54,230 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 02:01:54,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:54,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 02:01:54,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:54,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:01:54,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:54,289 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 02:01:54,435 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 02:01:54,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:01:54,834 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 02:01:54,834 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:01:54,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1355579090] [2023-11-29 02:01:54,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1355579090] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:01:54,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:01:54,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-29 02:01:54,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076378869] [2023-11-29 02:01:54,835 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:01:54,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 02:01:54,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:01:54,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 02:01:54,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-29 02:01:56,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 99 [2023-11-29 02:01:56,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 94 transitions, 249 flow. Second operand has 10 states, 10 states have (on average 46.0) internal successors, (460), 10 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:56,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:01:56,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 99 [2023-11-29 02:01:56,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:01:58,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:01:59,312 INFO L124 PetriNetUnfolderBase]: 4712/7901 cut-off events. [2023-11-29 02:01:59,312 INFO L125 PetriNetUnfolderBase]: For 100/101 co-relation queries the response was YES. [2023-11-29 02:01:59,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14539 conditions, 7901 events. 4712/7901 cut-off events. For 100/101 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 55331 event pairs, 3616 based on Foata normal form. 0/5243 useless extension candidates. Maximal degree in co-relation 14479. Up to 6450 conditions per place. [2023-11-29 02:01:59,370 INFO L140 encePairwiseOnDemand]: 90/99 looper letters, 48 selfloop transitions, 25 changer transitions 0/112 dead transitions. [2023-11-29 02:01:59,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 112 transitions, 479 flow [2023-11-29 02:01:59,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 02:01:59,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 02:01:59,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 529 transitions. [2023-11-29 02:01:59,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343434343434343 [2023-11-29 02:01:59,375 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 529 transitions. [2023-11-29 02:01:59,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 529 transitions. [2023-11-29 02:01:59,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:01:59,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 529 transitions. [2023-11-29 02:01:59,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 52.9) internal successors, (529), 10 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:59,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 99.0) internal successors, (1089), 11 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:59,384 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 99.0) internal successors, (1089), 11 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:59,384 INFO L175 Difference]: Start difference. First operand has 94 places, 94 transitions, 249 flow. Second operand 10 states and 529 transitions. [2023-11-29 02:01:59,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 112 transitions, 479 flow [2023-11-29 02:01:59,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 112 transitions, 475 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 02:01:59,390 INFO L231 Difference]: Finished difference. Result has 105 places, 112 transitions, 413 flow [2023-11-29 02:01:59,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=413, PETRI_PLACES=105, PETRI_TRANSITIONS=112} [2023-11-29 02:01:59,391 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 11 predicate places. [2023-11-29 02:01:59,391 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 112 transitions, 413 flow [2023-11-29 02:01:59,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 46.0) internal successors, (460), 10 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:01:59,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:01:59,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 02:01:59,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:01:59,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:01:59,593 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-29 02:01:59,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:01:59,593 INFO L85 PathProgramCache]: Analyzing trace with hash 893418818, now seen corresponding path program 1 times [2023-11-29 02:01:59,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:01:59,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1106166176] [2023-11-29 02:01:59,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:01:59,594 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 02:01:59,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:01:59,595 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:01:59,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:01:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:01:59,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 02:01:59,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:01:59,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:59,810 INFO L349 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2023-11-29 02:01:59,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 37 [2023-11-29 02:01:59,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:59,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:01:59,888 INFO L349 Elim1Store]: treesize reduction 44, result has 25.4 percent of original size [2023-11-29 02:01:59,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 29 [2023-11-29 02:02:00,133 INFO L349 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2023-11-29 02:02:00,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 75 [2023-11-29 02:02:00,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:02:00,532 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:02:00,532 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:02:00,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1106166176] [2023-11-29 02:02:00,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1106166176] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:02:00,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:02:00,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:02:00,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866249001] [2023-11-29 02:02:00,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:02:00,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:02:00,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:02:00,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:02:00,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:02:00,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 99 [2023-11-29 02:02:00,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 112 transitions, 413 flow. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:02:00,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:02:00,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 99 [2023-11-29 02:02:00,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:02:01,665 INFO L124 PetriNetUnfolderBase]: 4712/7630 cut-off events. [2023-11-29 02:02:01,665 INFO L125 PetriNetUnfolderBase]: For 129/130 co-relation queries the response was YES. [2023-11-29 02:02:01,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14324 conditions, 7630 events. 4712/7630 cut-off events. For 129/130 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 50614 event pairs, 3616 based on Foata normal form. 730/5976 useless extension candidates. Maximal degree in co-relation 14238. Up to 6473 conditions per place. [2023-11-29 02:02:01,740 INFO L140 encePairwiseOnDemand]: 96/99 looper letters, 70 selfloop transitions, 1 changer transitions 0/110 dead transitions. [2023-11-29 02:02:01,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 110 transitions, 551 flow [2023-11-29 02:02:01,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:02:01,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:02:01,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 184 transitions. [2023-11-29 02:02:01,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195286195286195 [2023-11-29 02:02:01,742 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 184 transitions. [2023-11-29 02:02:01,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 184 transitions. [2023-11-29 02:02:01,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:02:01,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 184 transitions. [2023-11-29 02:02:01,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 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 02:02:01,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:02:01,745 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:02:01,745 INFO L175 Difference]: Start difference. First operand has 105 places, 112 transitions, 413 flow. Second operand 3 states and 184 transitions. [2023-11-29 02:02:01,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 110 transitions, 551 flow [2023-11-29 02:02:01,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 110 transitions, 479 flow, removed 18 selfloop flow, removed 5 redundant places. [2023-11-29 02:02:01,750 INFO L231 Difference]: Finished difference. Result has 100 places, 110 transitions, 339 flow [2023-11-29 02:02:01,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=339, PETRI_PLACES=100, PETRI_TRANSITIONS=110} [2023-11-29 02:02:01,751 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 6 predicate places. [2023-11-29 02:02:01,751 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 110 transitions, 339 flow [2023-11-29 02:02:01,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:02:01,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:02:01,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 02:02:01,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:02:01,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:02:01,955 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-29 02:02:01,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:02:01,956 INFO L85 PathProgramCache]: Analyzing trace with hash 893418819, now seen corresponding path program 1 times [2023-11-29 02:02:01,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:02:01,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808152065] [2023-11-29 02:02:01,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:02:01,956 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 02:02:01,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:02:01,957 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:02:01,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:02:02,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:02:02,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 02:02:02,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:02:02,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:02,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-29 02:02:02,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:02,119 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 02:02:02,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:02,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:02,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:02,157 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 02:02:02,174 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:02:02,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:02,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:02,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:02,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:02:02,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:02,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:02,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:02,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:02,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 02:02:02,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:02,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:02,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:02,273 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 02:02:02,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:02,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 02:02:02,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:02:02,371 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:02:02,371 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:02:02,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808152065] [2023-11-29 02:02:02,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808152065] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:02:02,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:02:02,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:02:02,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884780834] [2023-11-29 02:02:02,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:02:02,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:02:02,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:02:02,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:02:02,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:02:02,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 99 [2023-11-29 02:02:02,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 110 transitions, 339 flow. Second operand has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:02:02,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:02:02,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 99 [2023-11-29 02:02:02,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:02:03,294 INFO L124 PetriNetUnfolderBase]: 4712/7359 cut-off events. [2023-11-29 02:02:03,294 INFO L125 PetriNetUnfolderBase]: For 110/111 co-relation queries the response was YES. [2023-11-29 02:02:03,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14007 conditions, 7359 events. 4712/7359 cut-off events. For 110/111 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 45942 event pairs, 3616 based on Foata normal form. 730/5975 useless extension candidates. Maximal degree in co-relation 13993. Up to 6473 conditions per place. [2023-11-29 02:02:03,333 INFO L140 encePairwiseOnDemand]: 96/99 looper letters, 70 selfloop transitions, 1 changer transitions 0/108 dead transitions. [2023-11-29 02:02:03,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 108 transitions, 477 flow [2023-11-29 02:02:03,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:02:03,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:02:03,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 184 transitions. [2023-11-29 02:02:03,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195286195286195 [2023-11-29 02:02:03,334 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 184 transitions. [2023-11-29 02:02:03,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 184 transitions. [2023-11-29 02:02:03,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:02:03,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 184 transitions. [2023-11-29 02:02:03,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 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 02:02:03,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:02:03,336 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:02:03,336 INFO L175 Difference]: Start difference. First operand has 100 places, 110 transitions, 339 flow. Second operand 3 states and 184 transitions. [2023-11-29 02:02:03,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 108 transitions, 477 flow [2023-11-29 02:02:03,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 108 transitions, 476 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:02:03,341 INFO L231 Difference]: Finished difference. Result has 99 places, 108 transitions, 336 flow [2023-11-29 02:02:03,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=336, PETRI_PLACES=99, PETRI_TRANSITIONS=108} [2023-11-29 02:02:03,342 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 5 predicate places. [2023-11-29 02:02:03,342 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 108 transitions, 336 flow [2023-11-29 02:02:03,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:02:03,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:02:03,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:02:03,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:02:03,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:02:03,543 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-29 02:02:03,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:02:03,543 INFO L85 PathProgramCache]: Analyzing trace with hash -71387461, now seen corresponding path program 1 times [2023-11-29 02:02:03,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:02:03,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [555809821] [2023-11-29 02:02:03,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:02:03,544 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 02:02:03,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:02:03,545 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:02:03,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:02:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:02:03,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 02:02:03,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:02:03,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:03,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:03,695 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-29 02:02:03,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2023-11-29 02:02:03,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:03,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:03,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:03,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 11 [2023-11-29 02:02:03,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:03,766 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-29 02:02:03,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 15 [2023-11-29 02:02:03,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:03,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:03,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2023-11-29 02:02:03,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:03,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:03,830 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-29 02:02:03,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 15 [2023-11-29 02:02:03,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:03,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:03,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-29 02:02:03,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:03,889 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-29 02:02:03,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2023-11-29 02:02:03,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:03,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:03,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-29 02:02:03,965 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 02:02:03,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-29 02:02:04,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:02:04,018 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:02:04,018 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:02:04,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [555809821] [2023-11-29 02:02:04,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [555809821] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:02:04,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:02:04,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:02:04,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786887300] [2023-11-29 02:02:04,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:02:04,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:02:04,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:02:04,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:02:04,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:02:04,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 99 [2023-11-29 02:02:04,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 108 transitions, 336 flow. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:02:04,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:02:04,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 99 [2023-11-29 02:02:04,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:02:04,857 INFO L124 PetriNetUnfolderBase]: 4712/7328 cut-off events. [2023-11-29 02:02:04,857 INFO L125 PetriNetUnfolderBase]: For 110/111 co-relation queries the response was YES. [2023-11-29 02:02:04,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13977 conditions, 7328 events. 4712/7328 cut-off events. For 110/111 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 45510 event pairs, 3616 based on Foata normal form. 69/5314 useless extension candidates. Maximal degree in co-relation 13962. Up to 6473 conditions per place. [2023-11-29 02:02:04,898 INFO L140 encePairwiseOnDemand]: 96/99 looper letters, 70 selfloop transitions, 1 changer transitions 0/106 dead transitions. [2023-11-29 02:02:04,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 106 transitions, 474 flow [2023-11-29 02:02:04,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:02:04,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:02:04,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 184 transitions. [2023-11-29 02:02:04,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195286195286195 [2023-11-29 02:02:04,900 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 184 transitions. [2023-11-29 02:02:04,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 184 transitions. [2023-11-29 02:02:04,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:02:04,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 184 transitions. [2023-11-29 02:02:04,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 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 02:02:04,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:02:04,902 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:02:04,902 INFO L175 Difference]: Start difference. First operand has 99 places, 108 transitions, 336 flow. Second operand 3 states and 184 transitions. [2023-11-29 02:02:04,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 106 transitions, 474 flow [2023-11-29 02:02:04,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 106 transitions, 473 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:02:04,905 INFO L231 Difference]: Finished difference. Result has 98 places, 106 transitions, 333 flow [2023-11-29 02:02:04,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=333, PETRI_PLACES=98, PETRI_TRANSITIONS=106} [2023-11-29 02:02:04,906 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 4 predicate places. [2023-11-29 02:02:04,906 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 106 transitions, 333 flow [2023-11-29 02:02:04,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:02:04,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:02:04,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:02:04,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-11-29 02:02:05,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:02:05,107 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-29 02:02:05,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:02:05,107 INFO L85 PathProgramCache]: Analyzing trace with hash -71387460, now seen corresponding path program 1 times [2023-11-29 02:02:05,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:02:05,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1184125871] [2023-11-29 02:02:05,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:02:05,108 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 02:02:05,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:02:05,109 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:02:05,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:02:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:02:05,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 02:02:05,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:02:05,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:05,268 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 02:02:05,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:05,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:05,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:05,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:05,313 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 02:02:05,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:05,332 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:02:05,343 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:02:05,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:05,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:05,368 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 02:02:05,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:05,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:05,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:05,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 02:02:05,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:05,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:05,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:02:05,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:05,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:05,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:05,452 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 02:02:05,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:05,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 02:02:05,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:02:05,587 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:02:05,587 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:02:05,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1184125871] [2023-11-29 02:02:05,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1184125871] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:02:05,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:02:05,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:02:05,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271034170] [2023-11-29 02:02:05,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:02:05,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:02:05,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:02:05,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:02:05,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:02:05,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 99 [2023-11-29 02:02:05,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 106 transitions, 333 flow. Second operand has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:02:05,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:02:05,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 99 [2023-11-29 02:02:05,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:02:06,578 INFO L124 PetriNetUnfolderBase]: 4712/7297 cut-off events. [2023-11-29 02:02:06,579 INFO L125 PetriNetUnfolderBase]: For 110/111 co-relation queries the response was YES. [2023-11-29 02:02:06,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13947 conditions, 7297 events. 4712/7297 cut-off events. For 110/111 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 44946 event pairs, 3616 based on Foata normal form. 69/5314 useless extension candidates. Maximal degree in co-relation 13931. Up to 6473 conditions per place. [2023-11-29 02:02:06,610 INFO L140 encePairwiseOnDemand]: 96/99 looper letters, 70 selfloop transitions, 1 changer transitions 0/104 dead transitions. [2023-11-29 02:02:06,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 104 transitions, 471 flow [2023-11-29 02:02:06,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:02:06,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:02:06,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 184 transitions. [2023-11-29 02:02:06,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195286195286195 [2023-11-29 02:02:06,612 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 184 transitions. [2023-11-29 02:02:06,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 184 transitions. [2023-11-29 02:02:06,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:02:06,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 184 transitions. [2023-11-29 02:02:06,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 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 02:02:06,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:02:06,613 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:02:06,613 INFO L175 Difference]: Start difference. First operand has 98 places, 106 transitions, 333 flow. Second operand 3 states and 184 transitions. [2023-11-29 02:02:06,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 104 transitions, 471 flow [2023-11-29 02:02:06,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 104 transitions, 470 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:02:06,616 INFO L231 Difference]: Finished difference. Result has 97 places, 104 transitions, 330 flow [2023-11-29 02:02:06,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=330, PETRI_PLACES=97, PETRI_TRANSITIONS=104} [2023-11-29 02:02:06,616 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 3 predicate places. [2023-11-29 02:02:06,616 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 104 transitions, 330 flow [2023-11-29 02:02:06,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:02:06,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:02:06,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:02:06,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:02:06,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:02:06,817 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-29 02:02:06,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:02:06,818 INFO L85 PathProgramCache]: Analyzing trace with hash 2081982445, now seen corresponding path program 1 times [2023-11-29 02:02:06,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:02:06,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2069848350] [2023-11-29 02:02:06,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:02:06,818 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 02:02:06,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:02:06,819 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:02:06,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:02:06,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:02:06,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:02:06,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:02:06,929 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 02:02:06,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:06,934 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 02:02:06,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:06,938 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 02:02:06,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:06,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:02:06,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:06,951 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 16 treesize of output 1 [2023-11-29 02:02:06,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:06,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:02:06,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:06,960 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 02:02:06,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:06,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:02:06,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:06,969 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 02:02:06,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:06,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:02:06,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:06,985 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 02:02:06,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:06,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:02:07,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:07,002 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 02:02:07,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:07,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:02:07,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:07,022 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 02:02:07,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:07,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 02:02:07,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:07,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:02:07,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:07,058 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 02:02:07,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:07,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:02:07,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:07,075 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 02:02:07,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:07,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:02:07,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:07,084 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 02:02:07,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:07,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:02:07,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:07,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:02:07,108 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 02:02:07,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-29 02:02:07,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:02:07,144 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:02:07,144 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:02:07,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2069848350] [2023-11-29 02:02:07,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2069848350] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:02:07,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:02:07,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:02:07,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144506165] [2023-11-29 02:02:07,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:02:07,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:02:07,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:02:07,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:02:07,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:02:07,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 99 [2023-11-29 02:02:07,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 104 transitions, 330 flow. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:02:07,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:02:07,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 99 [2023-11-29 02:02:07,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:02:08,138 INFO L124 PetriNetUnfolderBase]: 6304/9006 cut-off events. [2023-11-29 02:02:08,138 INFO L125 PetriNetUnfolderBase]: For 130/131 co-relation queries the response was YES. [2023-11-29 02:02:08,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17871 conditions, 9006 events. 6304/9006 cut-off events. For 130/131 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 46411 event pairs, 4968 based on Foata normal form. 0/6932 useless extension candidates. Maximal degree in co-relation 17854. Up to 8631 conditions per place. [2023-11-29 02:02:08,177 INFO L140 encePairwiseOnDemand]: 90/99 looper letters, 63 selfloop transitions, 11 changer transitions 0/98 dead transitions. [2023-11-29 02:02:08,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 98 transitions, 466 flow [2023-11-29 02:02:08,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:02:08,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:02:08,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 236 transitions. [2023-11-29 02:02:08,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4767676767676768 [2023-11-29 02:02:08,179 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 236 transitions. [2023-11-29 02:02:08,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 236 transitions. [2023-11-29 02:02:08,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:02:08,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 236 transitions. [2023-11-29 02:02:08,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 47.2) internal successors, (236), 5 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:02:08,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 99.0) internal successors, (594), 6 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:02:08,181 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 99.0) internal successors, (594), 6 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:02:08,181 INFO L175 Difference]: Start difference. First operand has 97 places, 104 transitions, 330 flow. Second operand 5 states and 236 transitions. [2023-11-29 02:02:08,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 98 transitions, 466 flow [2023-11-29 02:02:08,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 98 transitions, 465 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:02:08,185 INFO L231 Difference]: Finished difference. Result has 94 places, 98 transitions, 339 flow [2023-11-29 02:02:08,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=339, PETRI_PLACES=94, PETRI_TRANSITIONS=98} [2023-11-29 02:02:08,186 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 0 predicate places. [2023-11-29 02:02:08,186 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 98 transitions, 339 flow [2023-11-29 02:02:08,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:02:08,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:02:08,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:02:08,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:02:08,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:02:08,387 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-29 02:02:08,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:02:08,387 INFO L85 PathProgramCache]: Analyzing trace with hash 2081982446, now seen corresponding path program 1 times [2023-11-29 02:02:08,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:02:08,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [304623955] [2023-11-29 02:02:08,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:02:08,388 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 02:02:08,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:02:08,388 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:02:08,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:02:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:02:08,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 02:02:08,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:02:08,507 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 02:02:08,513 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 02:02:08,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:08,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:02:08,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:08,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:02:08,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:08,553 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 02:02:08,561 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 02:02:08,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:08,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:02:08,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:08,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:02:08,590 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 02:02:08,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:08,599 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 02:02:08,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:08,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:02:08,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:08,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:02:08,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:08,636 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 02:02:08,643 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 02:02:08,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:08,651 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 02:02:08,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:08,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:02:08,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 02:02:08,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:08,679 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 02:02:08,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:08,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:02:08,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:08,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:02:08,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:08,725 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 02:02:08,733 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 02:02:08,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:08,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:02:08,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:08,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:02:08,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:08,771 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 02:02:08,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:08,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:02:08,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:08,801 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 02:02:08,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:08,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:02:08,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:08,832 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 02:02:08,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:08,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 02:02:08,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:08,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 02:02:09,012 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 02:02:09,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 02:02:09,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:02:09,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:02:09,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:02:09,748 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:02:09,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [304623955] [2023-11-29 02:02:09,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [304623955] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:02:09,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:02:09,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-29 02:02:09,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114739273] [2023-11-29 02:02:09,749 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:02:09,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 02:02:09,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:02:09,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 02:02:09,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:02:14,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 99 [2023-11-29 02:02:14,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 98 transitions, 339 flow. Second operand has 12 states, 12 states have (on average 41.333333333333336) internal successors, (496), 12 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:02:14,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:02:14,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 99 [2023-11-29 02:02:14,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:02:20,707 INFO L124 PetriNetUnfolderBase]: 21885/31610 cut-off events. [2023-11-29 02:02:20,708 INFO L125 PetriNetUnfolderBase]: For 316/319 co-relation queries the response was YES. [2023-11-29 02:02:20,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62062 conditions, 31610 events. 21885/31610 cut-off events. For 316/319 co-relation queries the response was YES. Maximal size of possible extension queue 1215. Compared 212424 event pairs, 7464 based on Foata normal form. 0/23453 useless extension candidates. Maximal degree in co-relation 62044. Up to 5668 conditions per place. [2023-11-29 02:02:20,892 INFO L140 encePairwiseOnDemand]: 86/99 looper letters, 247 selfloop transitions, 56 changer transitions 0/325 dead transitions. [2023-11-29 02:02:20,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 325 transitions, 1555 flow [2023-11-29 02:02:20,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 02:02:20,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-29 02:02:20,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1225 transitions. [2023-11-29 02:02:20,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5379885814668424 [2023-11-29 02:02:20,897 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1225 transitions. [2023-11-29 02:02:20,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1225 transitions. [2023-11-29 02:02:20,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:02:20,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1225 transitions. [2023-11-29 02:02:20,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 53.26086956521739) internal successors, (1225), 23 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:02:20,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 99.0) internal successors, (2376), 24 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:02:20,905 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 99.0) internal successors, (2376), 24 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:02:20,905 INFO L175 Difference]: Start difference. First operand has 94 places, 98 transitions, 339 flow. Second operand 23 states and 1225 transitions. [2023-11-29 02:02:20,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 325 transitions, 1555 flow [2023-11-29 02:02:20,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 325 transitions, 1528 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 02:02:20,911 INFO L231 Difference]: Finished difference. Result has 114 places, 130 transitions, 601 flow [2023-11-29 02:02:20,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=601, PETRI_PLACES=114, PETRI_TRANSITIONS=130} [2023-11-29 02:02:20,912 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 20 predicate places. [2023-11-29 02:02:20,912 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 130 transitions, 601 flow [2023-11-29 02:02:20,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 41.333333333333336) internal successors, (496), 12 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:02:20,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:02:20,912 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-29 02:02:20,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:02:21,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:02:21,113 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-29 02:02:21,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:02:21,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1882943227, now seen corresponding path program 2 times [2023-11-29 02:02:21,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:02:21,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339814804] [2023-11-29 02:02:21,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:02:21,114 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 02:02:21,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:02:21,114 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:02:21,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:02:21,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:02:21,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:02:21,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 02:02:21,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:02:21,206 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 02:02:21,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:21,216 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 02:02:21,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:21,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:02:21,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:21,242 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 02:02:21,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:21,250 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 02:02:21,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:21,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:02:21,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:21,278 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 02:02:21,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:21,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:02:21,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:21,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:02:21,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:21,304 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 02:02:21,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:21,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:02:21,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:21,321 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 02:02:21,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:21,344 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 02:02:21,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:21,354 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 02:02:21,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:21,375 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 02:02:21,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:21,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 02:02:21,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:21,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:02:21,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:21,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:02:21,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:21,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:02:21,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:21,443 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 02:02:21,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:21,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:02:21,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:21,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:02:21,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:21,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:02:21,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:02:21,483 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 02:02:21,707 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 02:02:21,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:02:22,595 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 02:02:22,596 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:02:22,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339814804] [2023-11-29 02:02:22,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339814804] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:02:22,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:02:22,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 02:02:22,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238347826] [2023-11-29 02:02:22,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:02:22,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 02:02:22,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:02:22,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 02:02:22,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:02:26,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 99 [2023-11-29 02:02:26,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 130 transitions, 601 flow. Second operand has 14 states, 14 states have (on average 46.57142857142857) internal successors, (652), 14 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:02:26,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:02:26,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 99 [2023-11-29 02:02:26,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:02:32,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:02:35,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:02:37,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:02:40,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.63s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:02:44,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.92s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:02:46,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:02:49,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.58s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:02:53,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:02:55,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:02:57,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 02:03:00,066 INFO L124 PetriNetUnfolderBase]: 18542/27657 cut-off events. [2023-11-29 02:03:00,066 INFO L125 PetriNetUnfolderBase]: For 5538/6107 co-relation queries the response was YES. [2023-11-29 02:03:00,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58474 conditions, 27657 events. 18542/27657 cut-off events. For 5538/6107 co-relation queries the response was YES. Maximal size of possible extension queue 1107. Compared 192819 event pairs, 14088 based on Foata normal form. 30/20587 useless extension candidates. Maximal degree in co-relation 58454. Up to 25200 conditions per place. [2023-11-29 02:03:00,218 INFO L140 encePairwiseOnDemand]: 90/99 looper letters, 63 selfloop transitions, 103 changer transitions 0/190 dead transitions. [2023-11-29 02:03:00,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 190 transitions, 1347 flow [2023-11-29 02:03:00,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 02:03:00,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 02:03:00,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1111 transitions. [2023-11-29 02:03:00,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51010101010101 [2023-11-29 02:03:00,224 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1111 transitions. [2023-11-29 02:03:00,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1111 transitions. [2023-11-29 02:03:00,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:03:00,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1111 transitions. [2023-11-29 02:03:00,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 50.5) internal successors, (1111), 22 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:00,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 99.0) internal successors, (2277), 23 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:00,233 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 99.0) internal successors, (2277), 23 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:00,233 INFO L175 Difference]: Start difference. First operand has 114 places, 130 transitions, 601 flow. Second operand 22 states and 1111 transitions. [2023-11-29 02:03:00,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 190 transitions, 1347 flow [2023-11-29 02:03:00,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 190 transitions, 1305 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-29 02:03:00,257 INFO L231 Difference]: Finished difference. Result has 139 places, 190 transitions, 1269 flow [2023-11-29 02:03:00,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1269, PETRI_PLACES=139, PETRI_TRANSITIONS=190} [2023-11-29 02:03:00,258 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 45 predicate places. [2023-11-29 02:03:00,258 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 190 transitions, 1269 flow [2023-11-29 02:03:00,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 46.57142857142857) internal successors, (652), 14 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:00,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:03:00,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:03:00,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:03:00,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:03:00,459 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-29 02:03:00,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:03:00,460 INFO L85 PathProgramCache]: Analyzing trace with hash -694104221, now seen corresponding path program 1 times [2023-11-29 02:03:00,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:03:00,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501257096] [2023-11-29 02:03:00,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:03:00,460 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 02:03:00,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:03:00,461 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:03:00,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:03:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:03:00,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 02:03:00,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:03:00,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:00,614 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 02:03:00,621 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 02:03:00,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:00,626 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:03:00,630 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:03:00,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:00,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:00,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:03:00,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:00,646 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:03:00,649 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:03:00,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:00,657 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:03:00,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:00,663 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:03:00,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:00,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:00,676 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:03:00,682 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:03:00,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:00,687 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 02:03:00,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:00,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:00,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:03:00,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:00,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 02:03:00,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:03:00,835 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:03:00,835 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:03:00,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501257096] [2023-11-29 02:03:00,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501257096] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:03:00,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:03:00,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:03:00,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704131230] [2023-11-29 02:03:00,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:03:00,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:03:00,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:03:00,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:03:00,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:03:01,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 99 [2023-11-29 02:03:01,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 190 transitions, 1269 flow. Second operand has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:01,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:03:01,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 99 [2023-11-29 02:03:01,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:03:03,854 INFO L124 PetriNetUnfolderBase]: 18542/27629 cut-off events. [2023-11-29 02:03:03,854 INFO L125 PetriNetUnfolderBase]: For 5553/6122 co-relation queries the response was YES. [2023-11-29 02:03:03,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58638 conditions, 27629 events. 18542/27629 cut-off events. For 5553/6122 co-relation queries the response was YES. Maximal size of possible extension queue 1105. Compared 191927 event pairs, 14088 based on Foata normal form. 331/20894 useless extension candidates. Maximal degree in co-relation 58611. Up to 25301 conditions per place. [2023-11-29 02:03:04,047 INFO L140 encePairwiseOnDemand]: 96/99 looper letters, 163 selfloop transitions, 1 changer transitions 0/188 dead transitions. [2023-11-29 02:03:04,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 188 transitions, 1593 flow [2023-11-29 02:03:04,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:03:04,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:03:04,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 184 transitions. [2023-11-29 02:03:04,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195286195286195 [2023-11-29 02:03:04,049 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 184 transitions. [2023-11-29 02:03:04,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 184 transitions. [2023-11-29 02:03:04,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:03:04,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 184 transitions. [2023-11-29 02:03:04,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 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 02:03:04,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:04,050 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:04,050 INFO L175 Difference]: Start difference. First operand has 139 places, 190 transitions, 1269 flow. Second operand 3 states and 184 transitions. [2023-11-29 02:03:04,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 188 transitions, 1593 flow [2023-11-29 02:03:04,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 188 transitions, 1321 flow, removed 87 selfloop flow, removed 9 redundant places. [2023-11-29 02:03:04,071 INFO L231 Difference]: Finished difference. Result has 130 places, 188 transitions, 995 flow [2023-11-29 02:03:04,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=995, PETRI_PLACES=130, PETRI_TRANSITIONS=188} [2023-11-29 02:03:04,072 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 36 predicate places. [2023-11-29 02:03:04,072 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 188 transitions, 995 flow [2023-11-29 02:03:04,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:04,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:03:04,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:03:04,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:03:04,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:03:04,273 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-29 02:03:04,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:03:04,273 INFO L85 PathProgramCache]: Analyzing trace with hash -694104222, now seen corresponding path program 1 times [2023-11-29 02:03:04,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:03:04,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [269382202] [2023-11-29 02:03:04,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:03:04,274 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 02:03:04,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:03:04,274 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:03:04,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:03:04,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:03:04,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:03:04,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:03:04,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:04,490 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-29 02:03:04,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2023-11-29 02:03:04,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:04,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:04,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:04,525 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 02:03:04,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-29 02:03:04,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:04,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:04,555 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 02:03:04,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-29 02:03:04,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:04,566 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 02:03:04,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 02:03:04,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:04,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:04,587 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 02:03:04,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-29 02:03:04,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:04,596 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 02:03:04,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 02:03:04,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:04,606 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 02:03:04,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 02:03:04,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:04,614 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 02:03:04,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 02:03:04,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:04,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:04,635 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 02:03:04,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-29 02:03:04,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:04,644 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 02:03:04,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 02:03:04,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:04,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:04,663 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 02:03:04,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-29 02:03:04,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:04,672 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-29 02:03:04,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 02:03:04,690 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 02:03:04,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-29 02:03:04,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:03:04,709 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:03:04,709 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:03:04,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [269382202] [2023-11-29 02:03:04,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [269382202] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:03:04,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:03:04,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:03:04,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818523368] [2023-11-29 02:03:04,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:03:04,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:03:04,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:03:04,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:03:04,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:03:04,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 99 [2023-11-29 02:03:04,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 188 transitions, 995 flow. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:04,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:03:04,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 99 [2023-11-29 02:03:04,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:03:07,523 INFO L124 PetriNetUnfolderBase]: 19291/28664 cut-off events. [2023-11-29 02:03:07,523 INFO L125 PetriNetUnfolderBase]: For 5767/6334 co-relation queries the response was YES. [2023-11-29 02:03:07,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60833 conditions, 28664 events. 19291/28664 cut-off events. For 5767/6334 co-relation queries the response was YES. Maximal size of possible extension queue 1131. Compared 198977 event pairs, 14680 based on Foata normal form. 0/21427 useless extension candidates. Maximal degree in co-relation 60806. Up to 26392 conditions per place. [2023-11-29 02:03:07,755 INFO L140 encePairwiseOnDemand]: 96/99 looper letters, 165 selfloop transitions, 1 changer transitions 0/186 dead transitions. [2023-11-29 02:03:07,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 186 transitions, 1323 flow [2023-11-29 02:03:07,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:03:07,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:03:07,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 180 transitions. [2023-11-29 02:03:07,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2023-11-29 02:03:07,757 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 180 transitions. [2023-11-29 02:03:07,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 180 transitions. [2023-11-29 02:03:07,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:03:07,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 180 transitions. [2023-11-29 02:03:07,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:07,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:07,759 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:07,759 INFO L175 Difference]: Start difference. First operand has 130 places, 188 transitions, 995 flow. Second operand 3 states and 180 transitions. [2023-11-29 02:03:07,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 186 transitions, 1323 flow [2023-11-29 02:03:07,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 186 transitions, 1322 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:03:07,779 INFO L231 Difference]: Finished difference. Result has 129 places, 186 transitions, 992 flow [2023-11-29 02:03:07,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=990, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=992, PETRI_PLACES=129, PETRI_TRANSITIONS=186} [2023-11-29 02:03:07,780 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 35 predicate places. [2023-11-29 02:03:07,780 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 186 transitions, 992 flow [2023-11-29 02:03:07,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:07,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:03:07,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:03:07,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:03:07,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:03:07,981 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-29 02:03:07,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:03:07,981 INFO L85 PathProgramCache]: Analyzing trace with hash -42289638, now seen corresponding path program 1 times [2023-11-29 02:03:07,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:03:07,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1303669118] [2023-11-29 02:03:07,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:03:07,982 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 02:03:07,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:03:07,982 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:03:07,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:03:08,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:03:08,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 02:03:08,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:03:08,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:03:08,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:03:08,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:03:08,443 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:03:08,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1303669118] [2023-11-29 02:03:08,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1303669118] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:03:08,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:03:08,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-29 02:03:08,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362914470] [2023-11-29 02:03:08,444 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:03:08,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 02:03:08,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:03:08,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 02:03:08,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:03:09,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 99 [2023-11-29 02:03:09,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 186 transitions, 992 flow. Second operand has 14 states, 14 states have (on average 47.42857142857143) internal successors, (664), 14 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:09,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:03:09,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 99 [2023-11-29 02:03:09,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:03:11,779 INFO L124 PetriNetUnfolderBase]: 13581/20677 cut-off events. [2023-11-29 02:03:11,779 INFO L125 PetriNetUnfolderBase]: For 5221/6541 co-relation queries the response was YES. [2023-11-29 02:03:11,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43688 conditions, 20677 events. 13581/20677 cut-off events. For 5221/6541 co-relation queries the response was YES. Maximal size of possible extension queue 843. Compared 141582 event pairs, 9732 based on Foata normal form. 0/15535 useless extension candidates. Maximal degree in co-relation 43660. Up to 15238 conditions per place. [2023-11-29 02:03:11,897 INFO L140 encePairwiseOnDemand]: 89/99 looper letters, 175 selfloop transitions, 78 changer transitions 0/274 dead transitions. [2023-11-29 02:03:11,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 274 transitions, 1850 flow [2023-11-29 02:03:11,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 02:03:11,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 02:03:11,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 576 transitions. [2023-11-29 02:03:11,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818181818181818 [2023-11-29 02:03:11,900 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 576 transitions. [2023-11-29 02:03:11,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 576 transitions. [2023-11-29 02:03:11,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:03:11,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 576 transitions. [2023-11-29 02:03:11,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 57.6) internal successors, (576), 10 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:11,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 99.0) internal successors, (1089), 11 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:11,905 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 99.0) internal successors, (1089), 11 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:11,905 INFO L175 Difference]: Start difference. First operand has 129 places, 186 transitions, 992 flow. Second operand 10 states and 576 transitions. [2023-11-29 02:03:11,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 274 transitions, 1850 flow [2023-11-29 02:03:11,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 274 transitions, 1849 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:03:11,920 INFO L231 Difference]: Finished difference. Result has 142 places, 217 transitions, 1556 flow [2023-11-29 02:03:11,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=991, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1556, PETRI_PLACES=142, PETRI_TRANSITIONS=217} [2023-11-29 02:03:11,921 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 48 predicate places. [2023-11-29 02:03:11,921 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 217 transitions, 1556 flow [2023-11-29 02:03:11,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 47.42857142857143) internal successors, (664), 14 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:11,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:03:11,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:03:11,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:03:12,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:03:12,122 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-29 02:03:12,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:03:12,122 INFO L85 PathProgramCache]: Analyzing trace with hash 717281685, now seen corresponding path program 1 times [2023-11-29 02:03:12,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:03:12,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345398364] [2023-11-29 02:03:12,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:03:12,123 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 02:03:12,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:03:12,124 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:03:12,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:03:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:03:12,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 02:03:12,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:03:12,213 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 02:03:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:03:12,233 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:03:12,233 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:03:12,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345398364] [2023-11-29 02:03:12,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345398364] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:03:12,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:03:12,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:03:12,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370231245] [2023-11-29 02:03:12,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:03:12,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:03:12,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:03:12,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:03:12,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:03:12,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 99 [2023-11-29 02:03:12,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 217 transitions, 1556 flow. Second operand has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:12,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:03:12,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 99 [2023-11-29 02:03:12,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:03:14,211 INFO L124 PetriNetUnfolderBase]: 9313/14378 cut-off events. [2023-11-29 02:03:14,211 INFO L125 PetriNetUnfolderBase]: For 5536/6023 co-relation queries the response was YES. [2023-11-29 02:03:14,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32738 conditions, 14378 events. 9313/14378 cut-off events. For 5536/6023 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 96709 event pairs, 6917 based on Foata normal form. 0/11772 useless extension candidates. Maximal degree in co-relation 32704. Up to 12752 conditions per place. [2023-11-29 02:03:14,324 INFO L140 encePairwiseOnDemand]: 94/99 looper letters, 165 selfloop transitions, 27 changer transitions 0/214 dead transitions. [2023-11-29 02:03:14,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 214 transitions, 1934 flow [2023-11-29 02:03:14,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:03:14,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:03:14,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 227 transitions. [2023-11-29 02:03:14,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5732323232323232 [2023-11-29 02:03:14,326 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 227 transitions. [2023-11-29 02:03:14,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 227 transitions. [2023-11-29 02:03:14,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:03:14,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 227 transitions. [2023-11-29 02:03:14,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:14,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 99.0) internal successors, (495), 5 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:14,328 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 99.0) internal successors, (495), 5 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:14,328 INFO L175 Difference]: Start difference. First operand has 142 places, 217 transitions, 1556 flow. Second operand 4 states and 227 transitions. [2023-11-29 02:03:14,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 214 transitions, 1934 flow [2023-11-29 02:03:14,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 214 transitions, 1917 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-11-29 02:03:14,353 INFO L231 Difference]: Finished difference. Result has 141 places, 214 transitions, 1587 flow [2023-11-29 02:03:14,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=1533, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1587, PETRI_PLACES=141, PETRI_TRANSITIONS=214} [2023-11-29 02:03:14,354 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 47 predicate places. [2023-11-29 02:03:14,354 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 214 transitions, 1587 flow [2023-11-29 02:03:14,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:14,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:03:14,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:03:14,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:03:14,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:03:14,555 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-29 02:03:14,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:03:14,556 INFO L85 PathProgramCache]: Analyzing trace with hash 717281686, now seen corresponding path program 1 times [2023-11-29 02:03:14,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:03:14,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [323747511] [2023-11-29 02:03:14,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:03:14,556 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 02:03:14,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:03:14,557 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:03:14,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:03:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:03:14,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 02:03:14,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:03:14,663 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 02:03:14,835 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:03:14,836 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 89 treesize of output 19 [2023-11-29 02:03:17,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:03:17,620 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:03:17,620 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:03:17,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [323747511] [2023-11-29 02:03:17,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [323747511] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:03:17,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:03:17,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 02:03:17,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528978630] [2023-11-29 02:03:17,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:03:17,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:03:17,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:03:17,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:03:17,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:03:19,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 99 [2023-11-29 02:03:19,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 214 transitions, 1587 flow. Second operand has 7 states, 7 states have (on average 47.57142857142857) internal successors, (333), 7 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:19,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:03:19,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 99 [2023-11-29 02:03:19,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:03:24,247 INFO L124 PetriNetUnfolderBase]: 15837/22677 cut-off events. [2023-11-29 02:03:24,247 INFO L125 PetriNetUnfolderBase]: For 7591/8877 co-relation queries the response was YES. [2023-11-29 02:03:24,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51879 conditions, 22677 events. 15837/22677 cut-off events. For 7591/8877 co-relation queries the response was YES. Maximal size of possible extension queue 766. Compared 139968 event pairs, 7777 based on Foata normal form. 0/18848 useless extension candidates. Maximal degree in co-relation 51844. Up to 14434 conditions per place. [2023-11-29 02:03:24,461 INFO L140 encePairwiseOnDemand]: 90/99 looper letters, 227 selfloop transitions, 50 changer transitions 0/298 dead transitions. [2023-11-29 02:03:24,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 298 transitions, 2361 flow [2023-11-29 02:03:24,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 02:03:24,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 02:03:24,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 443 transitions. [2023-11-29 02:03:24,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6392496392496393 [2023-11-29 02:03:24,464 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 443 transitions. [2023-11-29 02:03:24,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 443 transitions. [2023-11-29 02:03:24,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:03:24,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 443 transitions. [2023-11-29 02:03:24,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 63.285714285714285) internal successors, (443), 7 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:24,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:24,467 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:24,467 INFO L175 Difference]: Start difference. First operand has 141 places, 214 transitions, 1587 flow. Second operand 7 states and 443 transitions. [2023-11-29 02:03:24,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 298 transitions, 2361 flow [2023-11-29 02:03:24,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 298 transitions, 2333 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:03:24,492 INFO L231 Difference]: Finished difference. Result has 148 places, 222 transitions, 1719 flow [2023-11-29 02:03:24,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=1559, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1719, PETRI_PLACES=148, PETRI_TRANSITIONS=222} [2023-11-29 02:03:24,493 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 54 predicate places. [2023-11-29 02:03:24,493 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 222 transitions, 1719 flow [2023-11-29 02:03:24,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 47.57142857142857) internal successors, (333), 7 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:24,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:03:24,494 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:03:24,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2023-11-29 02:03:24,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:03:24,694 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-29 02:03:24,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:03:24,695 INFO L85 PathProgramCache]: Analyzing trace with hash 2112928854, now seen corresponding path program 1 times [2023-11-29 02:03:24,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:03:24,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1583028241] [2023-11-29 02:03:24,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:03:24,695 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 02:03:24,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:03:24,696 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:03:24,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:03:24,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:03:24,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 02:03:24,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:03:24,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:03:24,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:03:25,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:03:25,115 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:03:25,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1583028241] [2023-11-29 02:03:25,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1583028241] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:03:25,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:03:25,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-29 02:03:25,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162247081] [2023-11-29 02:03:25,115 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:03:25,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 02:03:25,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:03:25,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 02:03:25,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:03:25,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 99 [2023-11-29 02:03:25,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 222 transitions, 1719 flow. Second operand has 14 states, 14 states have (on average 47.714285714285715) internal successors, (668), 14 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:25,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:03:25,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 99 [2023-11-29 02:03:25,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:03:28,647 INFO L124 PetriNetUnfolderBase]: 13761/20719 cut-off events. [2023-11-29 02:03:28,647 INFO L125 PetriNetUnfolderBase]: For 13751/14705 co-relation queries the response was YES. [2023-11-29 02:03:28,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50993 conditions, 20719 events. 13761/20719 cut-off events. For 13751/14705 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 138729 event pairs, 10208 based on Foata normal form. 434/18268 useless extension candidates. Maximal degree in co-relation 50956. Up to 16202 conditions per place. [2023-11-29 02:03:28,853 INFO L140 encePairwiseOnDemand]: 89/99 looper letters, 191 selfloop transitions, 69 changer transitions 0/282 dead transitions. [2023-11-29 02:03:28,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 282 transitions, 2406 flow [2023-11-29 02:03:28,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 02:03:28,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 02:03:28,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 581 transitions. [2023-11-29 02:03:28,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5868686868686869 [2023-11-29 02:03:28,856 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 581 transitions. [2023-11-29 02:03:28,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 581 transitions. [2023-11-29 02:03:28,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:03:28,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 581 transitions. [2023-11-29 02:03:28,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.1) internal successors, (581), 10 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:28,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 99.0) internal successors, (1089), 11 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:28,859 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 99.0) internal successors, (1089), 11 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:28,860 INFO L175 Difference]: Start difference. First operand has 148 places, 222 transitions, 1719 flow. Second operand 10 states and 581 transitions. [2023-11-29 02:03:28,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 282 transitions, 2406 flow [2023-11-29 02:03:28,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 282 transitions, 2323 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 02:03:28,889 INFO L231 Difference]: Finished difference. Result has 154 places, 219 transitions, 1763 flow [2023-11-29 02:03:28,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=1612, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1763, PETRI_PLACES=154, PETRI_TRANSITIONS=219} [2023-11-29 02:03:28,890 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 60 predicate places. [2023-11-29 02:03:28,890 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 219 transitions, 1763 flow [2023-11-29 02:03:28,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 47.714285714285715) internal successors, (668), 14 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:28,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:03:28,891 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:03:28,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:03:29,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:03:29,091 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-29 02:03:29,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:03:29,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1498444392, now seen corresponding path program 2 times [2023-11-29 02:03:29,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:03:29,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [841730524] [2023-11-29 02:03:29,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:03:29,092 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 02:03:29,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:03:29,093 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:03:29,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:03:29,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 02:03:29,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:03:29,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 02:03:29,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:03:29,216 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 02:03:29,222 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 02:03:29,236 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 02:03:29,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:29,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:03:29,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:29,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:03:29,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:29,279 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 02:03:29,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:29,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:03:29,299 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 02:03:29,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:29,309 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 02:03:29,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:29,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:03:29,329 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 02:03:29,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:29,337 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 02:03:29,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:29,349 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 02:03:29,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:29,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:03:29,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:29,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:03:29,386 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 02:03:29,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:29,395 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 02:03:29,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:29,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:03:29,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:29,431 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 02:03:29,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:29,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 02:03:29,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:29,483 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 02:03:29,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:29,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:03:29,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:29,516 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 02:03:29,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:29,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:03:29,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-29 02:03:29,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:29,547 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 02:03:29,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:29,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:03:29,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:29,586 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 02:03:29,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:29,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:03:29,608 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 02:03:29,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:29,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:03:29,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:29,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 02:03:29,718 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 02:03:29,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 02:03:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:03:29,921 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:03:29,921 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:03:29,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [841730524] [2023-11-29 02:03:29,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [841730524] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:03:29,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:03:29,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:03:29,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210904432] [2023-11-29 02:03:29,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:03:29,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:03:29,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:03:29,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:03:29,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:03:30,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 99 [2023-11-29 02:03:30,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 219 transitions, 1763 flow. Second operand has 6 states, 6 states have (on average 41.666666666666664) internal successors, (250), 6 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:30,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:03:30,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 99 [2023-11-29 02:03:30,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:03:36,518 INFO L124 PetriNetUnfolderBase]: 33178/46435 cut-off events. [2023-11-29 02:03:36,518 INFO L125 PetriNetUnfolderBase]: For 33214/36898 co-relation queries the response was YES. [2023-11-29 02:03:36,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116130 conditions, 46435 events. 33178/46435 cut-off events. For 33214/36898 co-relation queries the response was YES. Maximal size of possible extension queue 1152. Compared 278910 event pairs, 19046 based on Foata normal form. 0/39524 useless extension candidates. Maximal degree in co-relation 116091. Up to 27765 conditions per place. [2023-11-29 02:03:36,949 INFO L140 encePairwiseOnDemand]: 91/99 looper letters, 208 selfloop transitions, 43 changer transitions 0/268 dead transitions. [2023-11-29 02:03:36,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 268 transitions, 2468 flow [2023-11-29 02:03:36,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:03:36,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 02:03:36,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 324 transitions. [2023-11-29 02:03:36,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2023-11-29 02:03:36,951 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 324 transitions. [2023-11-29 02:03:36,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 324 transitions. [2023-11-29 02:03:36,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:03:36,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 324 transitions. [2023-11-29 02:03:36,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 54.0) internal successors, (324), 6 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:36,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 99.0) internal successors, (693), 7 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:36,954 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 99.0) internal successors, (693), 7 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:36,954 INFO L175 Difference]: Start difference. First operand has 154 places, 219 transitions, 1763 flow. Second operand 6 states and 324 transitions. [2023-11-29 02:03:36,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 268 transitions, 2468 flow [2023-11-29 02:03:37,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 268 transitions, 2326 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-11-29 02:03:37,006 INFO L231 Difference]: Finished difference. Result has 154 places, 221 transitions, 1733 flow [2023-11-29 02:03:37,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=1628, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1733, PETRI_PLACES=154, PETRI_TRANSITIONS=221} [2023-11-29 02:03:37,007 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 60 predicate places. [2023-11-29 02:03:37,007 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 221 transitions, 1733 flow [2023-11-29 02:03:37,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 41.666666666666664) internal successors, (250), 6 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:03:37,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:03:37,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:03:37,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-11-29 02:03:37,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:03:37,208 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-29 02:03:37,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:03:37,208 INFO L85 PathProgramCache]: Analyzing trace with hash -222021970, now seen corresponding path program 1 times [2023-11-29 02:03:37,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:03:37,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1392830135] [2023-11-29 02:03:37,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:03:37,209 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 02:03:37,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:03:37,209 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:03:37,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:03:37,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:03:37,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 02:03:37,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:03:37,366 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 02:03:37,374 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 02:03:37,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:37,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:03:37,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:37,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:03:37,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:37,446 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 02:03:37,455 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 02:03:37,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:37,464 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 02:03:37,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:37,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:03:37,483 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 02:03:37,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:37,494 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 02:03:37,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:37,504 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 02:03:37,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:37,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:03:37,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:37,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:03:37,545 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 02:03:37,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:37,554 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 02:03:37,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:37,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:03:37,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:37,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:03:37,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:37,609 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 02:03:37,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:37,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:03:37,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:37,645 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 02:03:37,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:37,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 02:03:37,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:37,700 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 02:03:37,710 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 02:03:37,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:37,721 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 02:03:37,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:37,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:03:37,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:37,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:03:37,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:37,773 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 02:03:37,782 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 02:03:37,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:37,794 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 02:03:37,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:37,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:03:37,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:03:37,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 02:03:37,995 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 02:03:37,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 02:03:38,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:03:38,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:03:39,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:03:39,942 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:03:39,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1392830135] [2023-11-29 02:03:39,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1392830135] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:03:39,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:03:39,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 02:03:39,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558375317] [2023-11-29 02:03:39,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:03:39,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 02:03:39,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:03:39,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 02:03:39,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:03:52,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:03:58,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:04:03,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:04:05,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:04:07,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 02:04:12,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 99 [2023-11-29 02:04:12,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 221 transitions, 1733 flow. Second operand has 14 states, 14 states have (on average 41.714285714285715) internal successors, (584), 14 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:04:12,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:04:12,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 99 [2023-11-29 02:04:12,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:04:17,421 WARN L539 Checker$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 02:04:36,967 INFO L124 PetriNetUnfolderBase]: 28453/40836 cut-off events. [2023-11-29 02:04:36,967 INFO L125 PetriNetUnfolderBase]: For 41624/46347 co-relation queries the response was YES. [2023-11-29 02:04:37,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107595 conditions, 40836 events. 28453/40836 cut-off events. For 41624/46347 co-relation queries the response was YES. Maximal size of possible extension queue 1253. Compared 270308 event pairs, 8155 based on Foata normal form. 833/35873 useless extension candidates. Maximal degree in co-relation 107555. Up to 11139 conditions per place. [2023-11-29 02:04:37,462 INFO L140 encePairwiseOnDemand]: 86/99 looper letters, 247 selfloop transitions, 142 changer transitions 0/407 dead transitions. [2023-11-29 02:04:37,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 407 transitions, 3349 flow [2023-11-29 02:04:37,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 02:04:37,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 02:04:37,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1032 transitions. [2023-11-29 02:04:37,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212121212121212 [2023-11-29 02:04:37,466 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1032 transitions. [2023-11-29 02:04:37,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1032 transitions. [2023-11-29 02:04:37,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:04:37,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1032 transitions. [2023-11-29 02:04:37,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 51.6) internal successors, (1032), 20 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:04:37,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 99.0) internal successors, (2079), 21 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:04:37,471 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 99.0) internal successors, (2079), 21 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:04:37,471 INFO L175 Difference]: Start difference. First operand has 154 places, 221 transitions, 1733 flow. Second operand 20 states and 1032 transitions. [2023-11-29 02:04:37,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 407 transitions, 3349 flow [2023-11-29 02:04:37,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 407 transitions, 3241 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 02:04:37,505 INFO L231 Difference]: Finished difference. Result has 171 places, 243 transitions, 2164 flow [2023-11-29 02:04:37,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=1650, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2164, PETRI_PLACES=171, PETRI_TRANSITIONS=243} [2023-11-29 02:04:37,506 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 77 predicate places. [2023-11-29 02:04:37,506 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 243 transitions, 2164 flow [2023-11-29 02:04:37,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 41.714285714285715) internal successors, (584), 14 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:04:37,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:04:37,507 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:04:37,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:04:37,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:04:37,707 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-29 02:04:37,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:04:37,707 INFO L85 PathProgramCache]: Analyzing trace with hash -35493324, now seen corresponding path program 2 times [2023-11-29 02:04:37,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:04:37,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [390516063] [2023-11-29 02:04:37,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:04:37,708 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 02:04:37,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:04:37,709 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:04:37,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:04:37,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 02:04:37,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:04:37,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 02:04:37,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:04:37,812 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 02:04:37,820 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 02:04:37,831 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 02:04:37,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:04:37,840 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 02:04:37,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:04:37,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:04:37,859 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 02:04:37,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:04:37,868 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 02:04:37,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:04:37,896 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 02:04:37,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:04:37,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:04:37,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:04:37,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:04:37,929 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 02:04:37,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:04:37,938 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 02:04:37,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:04:37,949 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 02:04:37,957 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 02:04:37,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:04:37,967 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 02:04:37,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:04:37,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:04:37,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:04:38,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:04:38,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:04:38,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:04:38,021 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 02:04:38,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:04:38,034 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 02:04:38,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:04:38,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 02:04:38,056 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 02:04:38,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:04:38,066 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 02:04:38,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:04:38,093 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 02:04:38,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:04:38,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:04:38,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:04:38,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 02:04:38,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:04:38,169 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 02:04:38,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:04:38,192 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 02:04:38,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:04:38,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:04:38,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:04:38,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 02:04:38,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:04:38,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:04:38,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:04:38,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 02:04:38,411 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 02:04:38,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 02:04:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 02:04:38,565 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:04:38,565 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:04:38,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [390516063] [2023-11-29 02:04:38,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [390516063] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:04:38,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:04:38,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:04:38,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873053416] [2023-11-29 02:04:38,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:04:38,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:04:38,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:04:38,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:04:38,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:04:39,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 99 [2023-11-29 02:04:39,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 243 transitions, 2164 flow. Second operand has 6 states, 6 states have (on average 41.333333333333336) internal successors, (248), 6 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:04:39,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:04:39,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 99 [2023-11-29 02:04:39,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:04:50,500 INFO L124 PetriNetUnfolderBase]: 57770/83072 cut-off events. [2023-11-29 02:04:50,501 INFO L125 PetriNetUnfolderBase]: For 72532/77303 co-relation queries the response was YES. [2023-11-29 02:04:51,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224766 conditions, 83072 events. 57770/83072 cut-off events. For 72532/77303 co-relation queries the response was YES. Maximal size of possible extension queue 1970. Compared 564733 event pairs, 43230 based on Foata normal form. 998/74083 useless extension candidates. Maximal degree in co-relation 224723. Up to 42554 conditions per place. [2023-11-29 02:04:51,343 INFO L140 encePairwiseOnDemand]: 92/99 looper letters, 225 selfloop transitions, 54 changer transitions 0/296 dead transitions. [2023-11-29 02:04:51,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 296 transitions, 2937 flow [2023-11-29 02:04:51,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:04:51,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 02:04:51,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 323 transitions. [2023-11-29 02:04:51,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5437710437710438 [2023-11-29 02:04:51,344 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 323 transitions. [2023-11-29 02:04:51,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 323 transitions. [2023-11-29 02:04:51,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:04:51,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 323 transitions. [2023-11-29 02:04:51,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 53.833333333333336) internal successors, (323), 6 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:04:51,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 99.0) internal successors, (693), 7 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:04:51,346 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 99.0) internal successors, (693), 7 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:04:51,346 INFO L175 Difference]: Start difference. First operand has 171 places, 243 transitions, 2164 flow. Second operand 6 states and 323 transitions. [2023-11-29 02:04:51,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 296 transitions, 2937 flow [2023-11-29 02:04:51,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 296 transitions, 2892 flow, removed 10 selfloop flow, removed 6 redundant places. [2023-11-29 02:04:51,523 INFO L231 Difference]: Finished difference. Result has 171 places, 246 transitions, 2269 flow [2023-11-29 02:04:51,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=2114, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2269, PETRI_PLACES=171, PETRI_TRANSITIONS=246} [2023-11-29 02:04:51,524 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 77 predicate places. [2023-11-29 02:04:51,524 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 246 transitions, 2269 flow [2023-11-29 02:04:51,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 41.333333333333336) internal successors, (248), 6 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:04:51,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:04:51,524 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:04:51,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:04:51,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:04:51,725 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-29 02:04:51,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:04:51,725 INFO L85 PathProgramCache]: Analyzing trace with hash -961175856, now seen corresponding path program 1 times [2023-11-29 02:04:51,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:04:51,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [279398826] [2023-11-29 02:04:51,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:04:51,725 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 02:04:51,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:04:51,726 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:04:51,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:04:51,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:04:51,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 02:04:51,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:04:51,848 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 02:04:52,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:04:52,073 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:04:52,074 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:04:52,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [279398826] [2023-11-29 02:04:52,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [279398826] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:04:52,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:04:52,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 02:04:52,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537003203] [2023-11-29 02:04:52,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:04:52,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:04:52,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:04:52,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:04:52,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:04:52,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 99 [2023-11-29 02:04:52,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 246 transitions, 2269 flow. Second operand has 5 states, 5 states have (on average 49.6) internal successors, (248), 5 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:04:52,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:04:52,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 99 [2023-11-29 02:04:52,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:05:03,589 INFO L124 PetriNetUnfolderBase]: 50879/78195 cut-off events. [2023-11-29 02:05:03,589 INFO L125 PetriNetUnfolderBase]: For 91176/99816 co-relation queries the response was YES. [2023-11-29 02:05:04,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221149 conditions, 78195 events. 50879/78195 cut-off events. For 91176/99816 co-relation queries the response was YES. Maximal size of possible extension queue 2223. Compared 626087 event pairs, 33242 based on Foata normal form. 1956/71337 useless extension candidates. Maximal degree in co-relation 221104. Up to 52127 conditions per place. [2023-11-29 02:05:04,439 INFO L140 encePairwiseOnDemand]: 89/99 looper letters, 283 selfloop transitions, 28 changer transitions 0/333 dead transitions. [2023-11-29 02:05:04,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 333 transitions, 3293 flow [2023-11-29 02:05:04,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:05:04,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:05:04,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 339 transitions. [2023-11-29 02:05:04,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6848484848484848 [2023-11-29 02:05:04,440 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 339 transitions. [2023-11-29 02:05:04,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 339 transitions. [2023-11-29 02:05:04,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:05:04,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 339 transitions. [2023-11-29 02:05:04,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:04,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 99.0) internal successors, (594), 6 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:04,443 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 99.0) internal successors, (594), 6 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:04,443 INFO L175 Difference]: Start difference. First operand has 171 places, 246 transitions, 2269 flow. Second operand 5 states and 339 transitions. [2023-11-29 02:05:04,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 333 transitions, 3293 flow [2023-11-29 02:05:05,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 333 transitions, 3177 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-11-29 02:05:05,045 INFO L231 Difference]: Finished difference. Result has 172 places, 255 transitions, 2337 flow [2023-11-29 02:05:05,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=2163, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2337, PETRI_PLACES=172, PETRI_TRANSITIONS=255} [2023-11-29 02:05:05,046 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 78 predicate places. [2023-11-29 02:05:05,046 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 255 transitions, 2337 flow [2023-11-29 02:05:05,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.6) internal successors, (248), 5 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:05,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:05:05,046 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:05:05,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2023-11-29 02:05:05,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:05:05,247 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-29 02:05:05,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:05:05,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1387418540, now seen corresponding path program 2 times [2023-11-29 02:05:05,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:05:05,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [464533063] [2023-11-29 02:05:05,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:05:05,247 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 02:05:05,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:05:05,248 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:05:05,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:05:05,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:05:05,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:05:05,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 02:05:05,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:05:05,417 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 1 [2023-11-29 02:05:05,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2023-11-29 02:05:05,435 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 02:05:05,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:05:05,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:05:05,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:05:05,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:05:05,461 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 02:05:05,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:05:05,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:05:05,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:05:05,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:05:05,485 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 02:05:05,496 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 02:05:05,501 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 02:05:05,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:05:05,531 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 02:05:05,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:05:05,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 02:05:05,583 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 02:05:05,587 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 02:05:05,596 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 02:05:05,601 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 02:05:05,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:05:05,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:05:05,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:05:05,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:05:05,626 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 02:05:05,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:05:05,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:05:05,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:05:05,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:05:05,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:05:05,659 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 02:05:05,664 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-29 02:05:05,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:05:05,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:05:05,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:05:05,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:05:05,688 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 02:05:05,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:05:05,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 02:05:05,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:05:05,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:05:05,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 02:05:05,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:05:05,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 02:05:05,849 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 02:05:05,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 02:05:06,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:06,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:05:07,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:07,233 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:05:07,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [464533063] [2023-11-29 02:05:07,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [464533063] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:05:07,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:05:07,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 02:05:07,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544440325] [2023-11-29 02:05:07,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:05:07,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 02:05:07,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:05:07,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 02:05:07,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:05:13,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 99 [2023-11-29 02:05:13,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 255 transitions, 2337 flow. Second operand has 14 states, 14 states have (on average 42.0) internal successors, (588), 14 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:13,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:05:13,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 99 [2023-11-29 02:05:13,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:05:34,092 INFO L124 PetriNetUnfolderBase]: 87511/123146 cut-off events. [2023-11-29 02:05:34,092 INFO L125 PetriNetUnfolderBase]: For 141108/156607 co-relation queries the response was YES. [2023-11-29 02:05:35,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375851 conditions, 123146 events. 87511/123146 cut-off events. For 141108/156607 co-relation queries the response was YES. Maximal size of possible extension queue 2878. Compared 888267 event pairs, 9734 based on Foata normal form. 948/114688 useless extension candidates. Maximal degree in co-relation 375805. Up to 32902 conditions per place. [2023-11-29 02:05:35,657 INFO L140 encePairwiseOnDemand]: 89/99 looper letters, 322 selfloop transitions, 84 changer transitions 0/423 dead transitions. [2023-11-29 02:05:35,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 423 transitions, 3882 flow [2023-11-29 02:05:35,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 02:05:35,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 02:05:35,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 724 transitions. [2023-11-29 02:05:35,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625485625485626 [2023-11-29 02:05:35,660 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 724 transitions. [2023-11-29 02:05:35,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 724 transitions. [2023-11-29 02:05:35,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:05:35,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 724 transitions. [2023-11-29 02:05:35,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 55.69230769230769) internal successors, (724), 13 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:35,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 99.0) internal successors, (1386), 14 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:35,662 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 99.0) internal successors, (1386), 14 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:35,662 INFO L175 Difference]: Start difference. First operand has 172 places, 255 transitions, 2337 flow. Second operand 13 states and 724 transitions. [2023-11-29 02:05:35,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 423 transitions, 3882 flow [2023-11-29 02:05:37,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 423 transitions, 3863 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:05:37,944 INFO L231 Difference]: Finished difference. Result has 185 places, 266 transitions, 2661 flow [2023-11-29 02:05:37,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=2318, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2661, PETRI_PLACES=185, PETRI_TRANSITIONS=266} [2023-11-29 02:05:37,945 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 91 predicate places. [2023-11-29 02:05:37,945 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 266 transitions, 2661 flow [2023-11-29 02:05:37,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 42.0) internal successors, (588), 14 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:37,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:05:37,945 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:05:37,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:05:38,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:05:38,146 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-29 02:05:38,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:05:38,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1734163869, now seen corresponding path program 1 times [2023-11-29 02:05:38,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:05:38,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1402551850] [2023-11-29 02:05:38,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:05:38,146 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:05:38,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:05:38,148 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:05:38,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:05:38,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:38,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 02:05:38,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:05:38,275 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 02:05:38,549 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:05:38,549 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 89 treesize of output 19 [2023-11-29 02:05:38,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:05:38,741 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:05:38,742 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:05:38,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1402551850] [2023-11-29 02:05:38,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1402551850] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:05:38,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:05:38,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 02:05:38,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471877742] [2023-11-29 02:05:38,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:05:38,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:05:38,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:05:38,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:05:38,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:05:41,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:05:43,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 99 [2023-11-29 02:05:43,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 266 transitions, 2661 flow. Second operand has 7 states, 7 states have (on average 47.857142857142854) internal successors, (335), 7 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:43,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:05:43,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 99 [2023-11-29 02:05:43,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:06:09,883 INFO L124 PetriNetUnfolderBase]: 116289/164345 cut-off events. [2023-11-29 02:06:09,884 INFO L125 PetriNetUnfolderBase]: For 342947/366729 co-relation queries the response was YES. [2023-11-29 02:06:11,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 518047 conditions, 164345 events. 116289/164345 cut-off events. For 342947/366729 co-relation queries the response was YES. Maximal size of possible extension queue 3446. Compared 1214385 event pairs, 51912 based on Foata normal form. 6954/157877 useless extension candidates. Maximal degree in co-relation 517998. Up to 95313 conditions per place. [2023-11-29 02:06:11,975 INFO L140 encePairwiseOnDemand]: 90/99 looper letters, 375 selfloop transitions, 51 changer transitions 0/447 dead transitions. [2023-11-29 02:06:11,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 447 transitions, 5053 flow [2023-11-29 02:06:11,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 02:06:11,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 02:06:11,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 440 transitions. [2023-11-29 02:06:11,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2023-11-29 02:06:11,978 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 440 transitions. [2023-11-29 02:06:11,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 440 transitions. [2023-11-29 02:06:11,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:06:11,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 440 transitions. [2023-11-29 02:06:11,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 62.857142857142854) internal successors, (440), 7 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 02:06:11,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:11,980 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 99.0) internal successors, (792), 8 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:11,980 INFO L175 Difference]: Start difference. First operand has 185 places, 266 transitions, 2661 flow. Second operand 7 states and 440 transitions. [2023-11-29 02:06:11,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 447 transitions, 5053 flow [2023-11-29 02:06:13,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 447 transitions, 4826 flow, removed 78 selfloop flow, removed 5 redundant places. [2023-11-29 02:06:13,189 INFO L231 Difference]: Finished difference. Result has 189 places, 272 transitions, 2678 flow [2023-11-29 02:06:13,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=2536, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2678, PETRI_PLACES=189, PETRI_TRANSITIONS=272} [2023-11-29 02:06:13,190 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 95 predicate places. [2023-11-29 02:06:13,190 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 272 transitions, 2678 flow [2023-11-29 02:06:13,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 47.857142857142854) internal successors, (335), 7 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:13,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:06:13,191 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:06:13,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:06:13,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:06:13,392 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-29 02:06:13,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:06:13,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1803646379, now seen corresponding path program 1 times [2023-11-29 02:06:13,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:06:13,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [300111737] [2023-11-29 02:06:13,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:13,392 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 02:06:13,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:06:13,393 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:06:13,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:06:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:13,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 02:06:13,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:06:13,530 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 02:06:13,749 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:06:13,749 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 89 treesize of output 19 [2023-11-29 02:06:14,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:06:14,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:06:14,574 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:06:14,575 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 91 treesize of output 21 [2023-11-29 02:06:14,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:06:14,990 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:06:14,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [300111737] [2023-11-29 02:06:14,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [300111737] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:06:14,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:06:14,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-29 02:06:14,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414004148] [2023-11-29 02:06:14,991 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:06:14,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 02:06:14,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:06:14,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 02:06:14,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:06:19,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:06:27,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:06:27,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 99 [2023-11-29 02:06:27,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 272 transitions, 2678 flow. Second operand has 14 states, 14 states have (on average 48.214285714285715) internal successors, (675), 14 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:27,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:06:27,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 99 [2023-11-29 02:06:27,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:06:37,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:07:22,813 INFO L124 PetriNetUnfolderBase]: 211434/290661 cut-off events. [2023-11-29 02:07:22,813 INFO L125 PetriNetUnfolderBase]: For 485138/527825 co-relation queries the response was YES. [2023-11-29 02:07:25,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 975812 conditions, 290661 events. 211434/290661 cut-off events. For 485138/527825 co-relation queries the response was YES. Maximal size of possible extension queue 5250. Compared 2138950 event pairs, 44398 based on Foata normal form. 11531/280866 useless extension candidates. Maximal degree in co-relation 975763. Up to 87487 conditions per place. [2023-11-29 02:07:26,430 INFO L140 encePairwiseOnDemand]: 87/99 looper letters, 547 selfloop transitions, 108 changer transitions 0/676 dead transitions. [2023-11-29 02:07:26,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 676 transitions, 5994 flow [2023-11-29 02:07:26,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 02:07:26,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 02:07:26,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 869 transitions. [2023-11-29 02:07:26,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6752136752136753 [2023-11-29 02:07:26,432 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 869 transitions. [2023-11-29 02:07:26,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 869 transitions. [2023-11-29 02:07:26,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:07:26,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 869 transitions. [2023-11-29 02:07:26,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 66.84615384615384) internal successors, (869), 13 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:07:26,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 99.0) internal successors, (1386), 14 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:07:26,436 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 99.0) internal successors, (1386), 14 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:07:26,436 INFO L175 Difference]: Start difference. First operand has 189 places, 272 transitions, 2678 flow. Second operand 13 states and 869 transitions. [2023-11-29 02:07:26,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 676 transitions, 5994 flow [2023-11-29 02:07:35,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 676 transitions, 5866 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 02:07:35,780 INFO L231 Difference]: Finished difference. Result has 205 places, 305 transitions, 3270 flow [2023-11-29 02:07:35,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=2586, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3270, PETRI_PLACES=205, PETRI_TRANSITIONS=305} [2023-11-29 02:07:35,780 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 111 predicate places. [2023-11-29 02:07:35,780 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 305 transitions, 3270 flow [2023-11-29 02:07:35,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 48.214285714285715) internal successors, (675), 14 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:07:35,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:07:35,781 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 02:07:35,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2023-11-29 02:07:35,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:07:35,981 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-29 02:07:35,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:07:35,982 INFO L85 PathProgramCache]: Analyzing trace with hash -5884232, now seen corresponding path program 1 times [2023-11-29 02:07:35,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:07:35,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1712257815] [2023-11-29 02:07:35,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:07:35,982 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 02:07:35,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:07:35,983 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:07:35,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40aba92-beae-4922-9134-b1d1ba005e21/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 02:07:36,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:36,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 02:07:36,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:07:36,112 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 02:07:36,367 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:07:36,367 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 89 treesize of output 19 [2023-11-29 02:07:36,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:07:36,537 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:07:36,537 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:07:36,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1712257815] [2023-11-29 02:07:36,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1712257815] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:07:36,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:07:36,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 02:07:36,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427512677] [2023-11-29 02:07:36,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:07:36,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:07:36,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:07:36,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:07:36,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:07:39,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:07:39,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 99 [2023-11-29 02:07:39,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 305 transitions, 3270 flow. Second operand has 7 states, 7 states have (on average 48.142857142857146) internal successors, (337), 7 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:07:39,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:07:39,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 99 [2023-11-29 02:07:39,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand