./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 30e01a73 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_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ --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 1c6ecf58df9dd6f4f380af0d7ef563f293bde5430d47e04b9ba5ac44168fc198 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:36:30,024 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:36:30,148 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-23 21:36:30,156 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:36:30,157 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:36:30,195 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:36:30,197 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:36:30,198 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:36:30,199 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:36:30,204 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:36:30,206 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 21:36:30,206 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 21:36:30,207 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 21:36:30,209 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:36:30,209 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:36:30,210 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:36:30,210 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:36:30,211 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:36:30,211 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 21:36:30,212 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 21:36:30,213 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 21:36:30,213 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:36:30,214 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 21:36:30,216 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 21:36:30,216 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:36:30,217 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:36:30,218 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:36:30,218 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 21:36:30,219 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:36:30,219 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:36:30,220 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:36:30,221 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:36:30,221 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:36:30,221 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 21:36:30,221 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:36:30,222 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:36:30,222 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 21:36:30,222 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 21:36:30,222 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:36:30,223 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_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c6ecf58df9dd6f4f380af0d7ef563f293bde5430d47e04b9ba5ac44168fc198 [2023-11-23 21:36:30,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:36:30,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:36:30,565 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:36:30,566 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:36:30,568 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:36:30,570 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2023-11-23 21:36:33,660 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:36:33,880 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:36:33,881 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2023-11-23 21:36:33,890 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/data/fa39367de/936a4310692a4d09b771666ebf70631f/FLAG1a551c1ee [2023-11-23 21:36:33,905 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/data/fa39367de/936a4310692a4d09b771666ebf70631f [2023-11-23 21:36:33,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:36:33,909 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:36:33,910 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:36:33,911 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:36:33,916 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:36:33,917 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:36:33" (1/1) ... [2023-11-23 21:36:33,918 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a5598de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:36:33, skipping insertion in model container [2023-11-23 21:36:33,918 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:36:33" (1/1) ... [2023-11-23 21:36:33,957 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:36:34,154 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:36:34,167 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) [2023-11-23 21:36:34,167 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7bb3dcbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:36:34, skipping insertion in model container [2023-11-23 21:36:34,167 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:36:34,168 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-23 21:36:34,170 INFO L158 Benchmark]: Toolchain (without parser) took 260.04ms. Allocated memory is still 167.8MB. Free memory was 124.5MB in the beginning and 113.6MB in the end (delta: 10.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-23 21:36:34,170 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 111.1MB. Free memory is still 61.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:36:34,171 INFO L158 Benchmark]: CACSL2BoogieTranslator took 257.52ms. Allocated memory is still 167.8MB. Free memory was 124.1MB in the beginning and 113.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-23 21:36:34,173 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 111.1MB. Free memory is still 61.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 257.52ms. Allocated memory is still 167.8MB. Free memory was 124.1MB in the beginning and 113.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 138]: 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_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ --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 1c6ecf58df9dd6f4f380af0d7ef563f293bde5430d47e04b9ba5ac44168fc198 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:36:36,571 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:36:36,690 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-23 21:36:36,715 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:36:36,715 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:36:36,743 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:36:36,744 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:36:36,744 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:36:36,745 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:36:36,746 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:36:36,747 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 21:36:36,747 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 21:36:36,748 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 21:36:36,749 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:36:36,749 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:36:36,750 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:36:36,751 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:36:36,752 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:36:36,752 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 21:36:36,753 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 21:36:36,754 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 21:36:36,754 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:36:36,755 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 21:36:36,756 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-23 21:36:36,756 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-23 21:36:36,757 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 21:36:36,757 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:36:36,758 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:36:36,759 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:36:36,759 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 21:36:36,760 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:36:36,760 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:36:36,761 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:36:36,761 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:36:36,762 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:36:36,762 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-23 21:36:36,763 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-23 21:36:36,763 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:36:36,764 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 21:36:36,764 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 21:36:36,765 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:36:36,765 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-23 21:36:36,766 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_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c6ecf58df9dd6f4f380af0d7ef563f293bde5430d47e04b9ba5ac44168fc198 [2023-11-23 21:36:37,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:36:37,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:36:37,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:36:37,252 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:36:37,252 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:36:37,254 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2023-11-23 21:36:40,394 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:36:40,692 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:36:40,693 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2023-11-23 21:36:40,703 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/data/967f3db0c/0826d6565d6943fc87ee66c68b0cfcfd/FLAGcffe1bd2d [2023-11-23 21:36:40,985 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/data/967f3db0c/0826d6565d6943fc87ee66c68b0cfcfd [2023-11-23 21:36:40,992 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:36:40,994 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:36:40,997 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:36:40,997 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:36:41,002 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:36:41,003 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:36:40" (1/1) ... [2023-11-23 21:36:41,005 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25b9411d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:36:41, skipping insertion in model container [2023-11-23 21:36:41,005 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:36:40" (1/1) ... [2023-11-23 21:36:41,032 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:36:41,324 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:36:41,351 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-23 21:36:41,362 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:36:41,399 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:36:41,411 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:36:41,480 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:36:41,526 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:36:41,527 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:36:41 WrapperNode [2023-11-23 21:36:41,528 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:36:41,529 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:36:41,530 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:36:41,530 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:36:41,538 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:36:41" (1/1) ... [2023-11-23 21:36:41,580 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:36:41" (1/1) ... [2023-11-23 21:36:41,629 INFO L138 Inliner]: procedures = 27, calls = 46, calls flagged for inlining = 10, calls inlined = 14, statements flattened = 180 [2023-11-23 21:36:41,629 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:36:41,630 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:36:41,630 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:36:41,631 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:36:41,641 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:36:41" (1/1) ... [2023-11-23 21:36:41,642 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:36:41" (1/1) ... [2023-11-23 21:36:41,656 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:36:41" (1/1) ... [2023-11-23 21:36:41,656 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:36:41" (1/1) ... [2023-11-23 21:36:41,682 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:36:41" (1/1) ... [2023-11-23 21:36:41,701 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:36:41" (1/1) ... [2023-11-23 21:36:41,704 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:36:41" (1/1) ... [2023-11-23 21:36:41,706 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:36:41" (1/1) ... [2023-11-23 21:36:41,711 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:36:41,725 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:36:41,725 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:36:41,725 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:36:41,726 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:36:41" (1/1) ... [2023-11-23 21:36:41,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:36:41,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 21:36:41,767 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:36:41,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:36:41,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:36:41,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-23 21:36:41,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:36:41,819 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-23 21:36:41,819 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-23 21:36:41,820 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-23 21:36:41,820 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-23 21:36:41,820 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-23 21:36:41,820 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-23 21:36:41,820 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-23 21:36:41,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:36:41,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:36:41,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:36:41,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:36:41,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-23 21:36:41,826 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 21:36:42,014 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:36:42,019 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:36:43,011 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:36:43,484 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:36:43,484 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-23 21:36:43,486 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:36:43 BoogieIcfgContainer [2023-11-23 21:36:43,486 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:36:43,489 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:36:43,490 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:36:43,493 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:36:43,495 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:36:40" (1/3) ... [2023-11-23 21:36:43,499 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eab6d84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:36:43, skipping insertion in model container [2023-11-23 21:36:43,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:36:41" (2/3) ... [2023-11-23 21:36:43,501 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eab6d84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:36:43, skipping insertion in model container [2023-11-23 21:36:43,502 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:36:43" (3/3) ... [2023-11-23 21:36:43,503 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-subst.wvr.c [2023-11-23 21:36:43,525 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:36:43,525 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-11-23 21:36:43,525 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 21:36:43,677 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-23 21:36:43,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 116 transitions, 253 flow [2023-11-23 21:36:43,786 INFO L124 PetriNetUnfolderBase]: 12/113 cut-off events. [2023-11-23 21:36:43,787 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-23 21:36:43,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 113 events. 12/113 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 370 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2023-11-23 21:36:43,794 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 116 transitions, 253 flow [2023-11-23 21:36:43,801 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 112 transitions, 242 flow [2023-11-23 21:36:43,812 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:36:43,820 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;@17495bff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:36:43,820 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2023-11-23 21:36:43,825 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 21:36:43,826 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-23 21:36:43,826 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-23 21:36:43,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 21:36:43,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-23 21:36:43,827 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 21:36:43,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:36:43,833 INFO L85 PathProgramCache]: Analyzing trace with hash 787337, now seen corresponding path program 1 times [2023-11-23 21:36:43,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 21:36:43,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1215040304] [2023-11-23 21:36:43,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:36:43,847 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 [2023-11-23 21:36:43,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat [2023-11-23 21:36:43,852 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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) [2023-11-23 21:36:43,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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 [2023-11-23 21:36:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:36:43,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:36:43,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:36:44,099 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 [2023-11-23 21:36:44,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:44,118 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 [2023-11-23 21:36:44,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:44,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-23 21:36:44,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:44,139 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 [2023-11-23 21:36:44,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:44,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-23 21:36:44,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:44,162 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 [2023-11-23 21:36:44,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:44,202 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 [2023-11-23 21:36:44,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:44,215 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 [2023-11-23 21:36:44,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:44,269 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 [2023-11-23 21:36:44,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:44,298 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 [2023-11-23 21:36:44,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:44,313 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 [2023-11-23 21:36:44,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:44,334 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 [2023-11-23 21:36:44,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:44,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-23 21:36:44,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:44,356 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 [2023-11-23 21:36:44,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:44,377 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 [2023-11-23 21:36:44,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:44,387 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 11 treesize of output 1 [2023-11-23 21:36:44,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:44,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-23 21:36:44,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:44,404 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 [2023-11-23 21:36:44,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:44,426 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 [2023-11-23 21:36:44,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:44,435 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 [2023-11-23 21:36:44,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:44,446 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 [2023-11-23 21:36:44,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:44,451 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 [2023-11-23 21:36:44,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:44,459 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 [2023-11-23 21:36:44,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:44,468 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 [2023-11-23 21:36:44,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:36:44,478 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:36:44,479 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 21:36:44,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1215040304] [2023-11-23 21:36:44,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1215040304] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:36:44,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:36:44,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 21:36:44,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116323322] [2023-11-23 21:36:44,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:36:44,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:36:44,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 21:36:44,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:36:44,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:36:44,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 116 [2023-11-23 21:36:44,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 112 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:36:44,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 21:36:44,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 116 [2023-11-23 21:36:44,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 21:36:45,775 INFO L124 PetriNetUnfolderBase]: 2712/5348 cut-off events. [2023-11-23 21:36:45,775 INFO L125 PetriNetUnfolderBase]: For 226/226 co-relation queries the response was YES. [2023-11-23 21:36:45,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9099 conditions, 5348 events. 2712/5348 cut-off events. For 226/226 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 40864 event pairs, 1692 based on Foata normal form. 1/3549 useless extension candidates. Maximal degree in co-relation 8492. Up to 3567 conditions per place. [2023-11-23 21:36:45,842 INFO L140 encePairwiseOnDemand]: 110/116 looper letters, 45 selfloop transitions, 2 changer transitions 0/107 dead transitions. [2023-11-23 21:36:45,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 107 transitions, 326 flow [2023-11-23 21:36:45,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:36:45,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 21:36:45,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 243 transitions. [2023-11-23 21:36:45,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6982758620689655 [2023-11-23 21:36:45,859 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 243 transitions. [2023-11-23 21:36:45,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 243 transitions. [2023-11-23 21:36:45,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 21:36:45,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 243 transitions. [2023-11-23 21:36:45,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:36:45,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:36:45,873 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:36:45,875 INFO L175 Difference]: Start difference. First operand has 110 places, 112 transitions, 242 flow. Second operand 3 states and 243 transitions. [2023-11-23 21:36:45,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 107 transitions, 326 flow [2023-11-23 21:36:45,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 107 transitions, 314 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-23 21:36:45,890 INFO L231 Difference]: Finished difference. Result has 101 places, 107 transitions, 224 flow [2023-11-23 21:36:45,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=101, PETRI_TRANSITIONS=107} [2023-11-23 21:36:45,896 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -9 predicate places. [2023-11-23 21:36:45,897 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 107 transitions, 224 flow [2023-11-23 21:36:45,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:36:45,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 21:36:45,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-23 21:36:45,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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 [2023-11-23 21:36:46,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:36:46,100 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 21:36:46,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:36:46,101 INFO L85 PathProgramCache]: Analyzing trace with hash 787338, now seen corresponding path program 1 times [2023-11-23 21:36:46,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 21:36:46,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40728416] [2023-11-23 21:36:46,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:36:46,102 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 [2023-11-23 21:36:46,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat [2023-11-23 21:36:46,106 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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) [2023-11-23 21:36:46,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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 [2023-11-23 21:36:46,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:36:46,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:36:46,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:36:46,241 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 [2023-11-23 21:36:46,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:46,255 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 [2023-11-23 21:36:46,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:46,270 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 [2023-11-23 21:36:46,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:46,291 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 [2023-11-23 21:36:46,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:46,302 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 [2023-11-23 21:36:46,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:46,315 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 [2023-11-23 21:36:46,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:46,360 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 [2023-11-23 21:36:46,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:46,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 21:36:46,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:46,385 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 [2023-11-23 21:36:46,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:46,398 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 [2023-11-23 21:36:46,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:46,411 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 [2023-11-23 21:36:46,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:46,425 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 [2023-11-23 21:36:46,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:46,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 21:36:46,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:46,455 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 [2023-11-23 21:36:46,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:46,465 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 [2023-11-23 21:36:46,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:46,486 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 [2023-11-23 21:36:46,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:46,515 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 [2023-11-23 21:36:46,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:46,529 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 [2023-11-23 21:36:46,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:46,564 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 [2023-11-23 21:36:46,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:46,587 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 [2023-11-23 21:36:46,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:46,618 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 [2023-11-23 21:36:46,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:46,655 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 [2023-11-23 21:36:46,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:46,678 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 [2023-11-23 21:36:46,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:46,692 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 [2023-11-23 21:36:46,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:36:46,786 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:36:46,786 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 21:36:46,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40728416] [2023-11-23 21:36:46,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40728416] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:36:46,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:36:46,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:36:46,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107038095] [2023-11-23 21:36:46,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:36:46,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:36:46,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 21:36:46,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:36:46,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:36:47,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 116 [2023-11-23 21:36:47,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 107 transitions, 224 flow. Second operand has 4 states, 4 states have (on average 64.75) internal successors, (259), 4 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:36:47,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 21:36:47,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 116 [2023-11-23 21:36:47,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 21:36:48,440 INFO L124 PetriNetUnfolderBase]: 2715/5357 cut-off events. [2023-11-23 21:36:48,440 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-11-23 21:36:48,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9007 conditions, 5357 events. 2715/5357 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 40877 event pairs, 1692 based on Foata normal form. 0/3553 useless extension candidates. Maximal degree in co-relation 8957. Up to 3580 conditions per place. [2023-11-23 21:36:48,556 INFO L140 encePairwiseOnDemand]: 103/116 looper letters, 49 selfloop transitions, 10 changer transitions 0/116 dead transitions. [2023-11-23 21:36:48,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 116 transitions, 362 flow [2023-11-23 21:36:48,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:36:48,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 21:36:48,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 318 transitions. [2023-11-23 21:36:48,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6853448275862069 [2023-11-23 21:36:48,560 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 318 transitions. [2023-11-23 21:36:48,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 318 transitions. [2023-11-23 21:36:48,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 21:36:48,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 318 transitions. [2023-11-23 21:36:48,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 79.5) internal successors, (318), 4 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:36:48,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:36:48,567 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:36:48,567 INFO L175 Difference]: Start difference. First operand has 101 places, 107 transitions, 224 flow. Second operand 4 states and 318 transitions. [2023-11-23 21:36:48,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 116 transitions, 362 flow [2023-11-23 21:36:48,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 116 transitions, 356 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 21:36:48,573 INFO L231 Difference]: Finished difference. Result has 105 places, 116 transitions, 302 flow [2023-11-23 21:36:48,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=302, PETRI_PLACES=105, PETRI_TRANSITIONS=116} [2023-11-23 21:36:48,574 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -5 predicate places. [2023-11-23 21:36:48,575 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 116 transitions, 302 flow [2023-11-23 21:36:48,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.75) internal successors, (259), 4 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:36:48,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 21:36:48,575 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-23 21:36:48,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:36:48,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:36:48,781 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 21:36:48,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:36:48,783 INFO L85 PathProgramCache]: Analyzing trace with hash 756659005, now seen corresponding path program 1 times [2023-11-23 21:36:48,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 21:36:48,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1477471616] [2023-11-23 21:36:48,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:36:48,784 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:36:48,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat [2023-11-23 21:36:48,785 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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) [2023-11-23 21:36:48,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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 [2023-11-23 21:36:48,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:36:48,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 21:36:48,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:36:48,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-11-23 21:36:48,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:48,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-23 21:36:48,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:48,979 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 [2023-11-23 21:36:48,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:48,994 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 [2023-11-23 21:36:49,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:49,023 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 [2023-11-23 21:36:49,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:49,041 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 [2023-11-23 21:36:49,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:49,054 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 [2023-11-23 21:36:49,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:49,067 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 [2023-11-23 21:36:49,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:49,077 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 [2023-11-23 21:36:49,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:49,089 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 [2023-11-23 21:36:49,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:49,115 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 [2023-11-23 21:36:49,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:49,132 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 [2023-11-23 21:36:49,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:49,145 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 [2023-11-23 21:36:49,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:49,157 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 [2023-11-23 21:36:49,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:49,172 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 [2023-11-23 21:36:49,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:49,180 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 [2023-11-23 21:36:49,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:49,205 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 [2023-11-23 21:36:49,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:49,219 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 [2023-11-23 21:36:49,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:49,231 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 [2023-11-23 21:36:49,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:49,242 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 [2023-11-23 21:36:49,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:49,255 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 [2023-11-23 21:36:49,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:49,264 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 [2023-11-23 21:36:49,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:49,278 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 [2023-11-23 21:36:49,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:49,301 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 [2023-11-23 21:36:49,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:36:49,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:36:49,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:36:49,959 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 21:36:49,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1477471616] [2023-11-23 21:36:49,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1477471616] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:36:49,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:36:49,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-23 21:36:49,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298654008] [2023-11-23 21:36:49,960 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:36:49,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 21:36:49,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 21:36:49,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 21:36:49,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-23 21:36:53,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 116 [2023-11-23 21:36:53,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 116 transitions, 302 flow. Second operand has 10 states, 10 states have (on average 65.0) internal successors, (650), 10 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:36:53,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 21:36:53,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 116 [2023-11-23 21:36:53,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 21:36:57,140 INFO L124 PetriNetUnfolderBase]: 2724/5384 cut-off events. [2023-11-23 21:36:57,141 INFO L125 PetriNetUnfolderBase]: For 64/64 co-relation queries the response was YES. [2023-11-23 21:36:57,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9125 conditions, 5384 events. 2724/5384 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 41031 event pairs, 1692 based on Foata normal form. 0/3580 useless extension candidates. Maximal degree in co-relation 8971. Up to 3583 conditions per place. [2023-11-23 21:36:57,196 INFO L140 encePairwiseOnDemand]: 103/116 looper letters, 49 selfloop transitions, 37 changer transitions 0/143 dead transitions. [2023-11-23 21:36:57,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 143 transitions, 594 flow [2023-11-23 21:36:57,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 21:36:57,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-23 21:36:57,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 735 transitions. [2023-11-23 21:36:57,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6336206896551724 [2023-11-23 21:36:57,203 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 735 transitions. [2023-11-23 21:36:57,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 735 transitions. [2023-11-23 21:36:57,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 21:36:57,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 735 transitions. [2023-11-23 21:36:57,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 73.5) internal successors, (735), 10 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:36:57,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 116.0) internal successors, (1276), 11 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:36:57,214 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 116.0) internal successors, (1276), 11 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:36:57,215 INFO L175 Difference]: Start difference. First operand has 105 places, 116 transitions, 302 flow. Second operand 10 states and 735 transitions. [2023-11-23 21:36:57,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 143 transitions, 594 flow [2023-11-23 21:36:57,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 143 transitions, 594 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-23 21:36:57,223 INFO L231 Difference]: Finished difference. Result has 117 places, 143 transitions, 546 flow [2023-11-23 21:36:57,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=546, PETRI_PLACES=117, PETRI_TRANSITIONS=143} [2023-11-23 21:36:57,224 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 7 predicate places. [2023-11-23 21:36:57,224 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 143 transitions, 546 flow [2023-11-23 21:36:57,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.0) internal successors, (650), 10 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:36:57,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 21:36:57,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 21:36:57,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:36:57,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:36:57,428 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 21:36:57,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:36:57,429 INFO L85 PathProgramCache]: Analyzing trace with hash 756715320, now seen corresponding path program 1 times [2023-11-23 21:36:57,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 21:36:57,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [391150851] [2023-11-23 21:36:57,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:36:57,430 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 [2023-11-23 21:36:57,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat [2023-11-23 21:36:57,431 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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) [2023-11-23 21:36:57,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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 [2023-11-23 21:36:57,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:36:57,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 21:36:57,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:36:57,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:57,663 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-23 21:36:57,663 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 [2023-11-23 21:36:57,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:57,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:57,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:57,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2023-11-23 21:36:57,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:57,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:57,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:57,785 INFO L349 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2023-11-23 21:36:57,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 1 [2023-11-23 21:36:57,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:57,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:57,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:57,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:57,847 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 21:36:57,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-23 21:36:57,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:57,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:57,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:57,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:57,906 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 21:36:57,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-23 21:36:57,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:57,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:57,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:57,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2023-11-23 21:36:57,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:57,977 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 13 [2023-11-23 21:36:58,044 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 21:36:58,044 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 [2023-11-23 21:36:58,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:36:58,081 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:36:58,082 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 21:36:58,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [391150851] [2023-11-23 21:36:58,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [391150851] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:36:58,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:36:58,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:36:58,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507498015] [2023-11-23 21:36:58,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:36:58,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:36:58,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 21:36:58,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:36:58,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:36:58,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 116 [2023-11-23 21:36:58,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 143 transitions, 546 flow. Second operand has 4 states, 4 states have (on average 66.25) internal successors, (265), 4 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:36:58,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 21:36:58,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 116 [2023-11-23 21:36:58,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 21:36:59,296 INFO L124 PetriNetUnfolderBase]: 2724/5334 cut-off events. [2023-11-23 21:36:59,296 INFO L125 PetriNetUnfolderBase]: For 96/96 co-relation queries the response was YES. [2023-11-23 21:36:59,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9138 conditions, 5334 events. 2724/5334 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 40224 event pairs, 1692 based on Foata normal form. 344/3930 useless extension candidates. Maximal degree in co-relation 9049. Up to 3611 conditions per place. [2023-11-23 21:36:59,355 INFO L140 encePairwiseOnDemand]: 113/116 looper letters, 82 selfloop transitions, 1 changer transitions 0/141 dead transitions. [2023-11-23 21:36:59,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 141 transitions, 708 flow [2023-11-23 21:36:59,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:36:59,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 21:36:59,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 244 transitions. [2023-11-23 21:36:59,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7011494252873564 [2023-11-23 21:36:59,358 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 244 transitions. [2023-11-23 21:36:59,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 244 transitions. [2023-11-23 21:36:59,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 21:36:59,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 244 transitions. [2023-11-23 21:36:59,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:36:59,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:36:59,361 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:36:59,361 INFO L175 Difference]: Start difference. First operand has 117 places, 143 transitions, 546 flow. Second operand 3 states and 244 transitions. [2023-11-23 21:36:59,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 141 transitions, 708 flow [2023-11-23 21:36:59,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 141 transitions, 613 flow, removed 25 selfloop flow, removed 4 redundant places. [2023-11-23 21:36:59,369 INFO L231 Difference]: Finished difference. Result has 113 places, 141 transitions, 449 flow [2023-11-23 21:36:59,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=449, PETRI_PLACES=113, PETRI_TRANSITIONS=141} [2023-11-23 21:36:59,370 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 3 predicate places. [2023-11-23 21:36:59,371 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 141 transitions, 449 flow [2023-11-23 21:36:59,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.25) internal successors, (265), 4 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:36:59,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 21:36:59,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 21:36:59,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:36:59,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:36:59,581 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 21:36:59,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:36:59,582 INFO L85 PathProgramCache]: Analyzing trace with hash 756715321, now seen corresponding path program 1 times [2023-11-23 21:36:59,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 21:36:59,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [223947177] [2023-11-23 21:36:59,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:36:59,583 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:36:59,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat [2023-11-23 21:36:59,584 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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) [2023-11-23 21:36:59,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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 [2023-11-23 21:36:59,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:36:59,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 21:36:59,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:36:59,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:59,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:59,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:59,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2023-11-23 21:36:59,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:59,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-23 21:36:59,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:59,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:59,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:59,837 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 [2023-11-23 21:36:59,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:59,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:59,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:59,877 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 [2023-11-23 21:36:59,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:36:59,932 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 [2023-11-23 21:36:59,940 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 [2023-11-23 21:37:00,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:00,045 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 [2023-11-23 21:37:00,075 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-23 21:37:00,076 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 [2023-11-23 21:37:00,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:00,191 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:37:00,191 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 21:37:00,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [223947177] [2023-11-23 21:37:00,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [223947177] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:00,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:00,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:37:00,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897209269] [2023-11-23 21:37:00,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:00,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:37:00,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 21:37:00,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:37:00,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:37:01,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 116 [2023-11-23 21:37:01,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 141 transitions, 449 flow. Second operand has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:01,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 21:37:01,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 116 [2023-11-23 21:37:01,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 21:37:02,555 INFO L124 PetriNetUnfolderBase]: 2724/5284 cut-off events. [2023-11-23 21:37:02,556 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2023-11-23 21:37:02,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9043 conditions, 5284 events. 2724/5284 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 39321 event pairs, 1692 based on Foata normal form. 344/3928 useless extension candidates. Maximal degree in co-relation 9030. Up to 3611 conditions per place. [2023-11-23 21:37:02,603 INFO L140 encePairwiseOnDemand]: 113/116 looper letters, 82 selfloop transitions, 1 changer transitions 0/139 dead transitions. [2023-11-23 21:37:02,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 139 transitions, 611 flow [2023-11-23 21:37:02,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:37:02,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 21:37:02,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 244 transitions. [2023-11-23 21:37:02,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7011494252873564 [2023-11-23 21:37:02,606 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 244 transitions. [2023-11-23 21:37:02,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 244 transitions. [2023-11-23 21:37:02,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 21:37:02,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 244 transitions. [2023-11-23 21:37:02,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:02,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:02,610 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:02,610 INFO L175 Difference]: Start difference. First operand has 113 places, 141 transitions, 449 flow. Second operand 3 states and 244 transitions. [2023-11-23 21:37:02,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 139 transitions, 611 flow [2023-11-23 21:37:02,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 139 transitions, 610 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 21:37:02,618 INFO L231 Difference]: Finished difference. Result has 112 places, 139 transitions, 446 flow [2023-11-23 21:37:02,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=446, PETRI_PLACES=112, PETRI_TRANSITIONS=139} [2023-11-23 21:37:02,621 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 2 predicate places. [2023-11-23 21:37:02,622 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 139 transitions, 446 flow [2023-11-23 21:37:02,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:02,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 21:37:02,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:02,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:37:02,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:37:02,833 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 21:37:02,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:02,835 INFO L85 PathProgramCache]: Analyzing trace with hash -976366528, now seen corresponding path program 1 times [2023-11-23 21:37:02,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 21:37:02,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88984764] [2023-11-23 21:37:02,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:02,836 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 [2023-11-23 21:37:02,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat [2023-11-23 21:37:02,838 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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) [2023-11-23 21:37:02,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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 [2023-11-23 21:37:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:03,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:37:03,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:37:03,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:03,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:03,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-23 21:37:03,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:03,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-23 21:37:03,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:03,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:03,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:03,119 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 [2023-11-23 21:37:03,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:03,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:03,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:03,156 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 [2023-11-23 21:37:03,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:03,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:03,173 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 [2023-11-23 21:37:03,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:03,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:03,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:03,218 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 [2023-11-23 21:37:03,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:03,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:03,238 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 [2023-11-23 21:37:03,258 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:37:03,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:03,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:03,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:03,293 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 [2023-11-23 21:37:03,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:03,345 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 [2023-11-23 21:37:03,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:03,374 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 [2023-11-23 21:37:03,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:03,486 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:37:03,486 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 21:37:03,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88984764] [2023-11-23 21:37:03,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88984764] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:03,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:03,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:37:03,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85219315] [2023-11-23 21:37:03,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:03,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:37:03,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 21:37:03,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:37:03,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:37:04,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 116 [2023-11-23 21:37:04,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 139 transitions, 446 flow. Second operand has 4 states, 4 states have (on average 66.75) internal successors, (267), 4 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:04,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 21:37:04,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 116 [2023-11-23 21:37:04,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 21:37:04,824 INFO L124 PetriNetUnfolderBase]: 2724/5275 cut-off events. [2023-11-23 21:37:04,825 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2023-11-23 21:37:04,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9035 conditions, 5275 events. 2724/5275 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 39191 event pairs, 1692 based on Foata normal form. 49/3633 useless extension candidates. Maximal degree in co-relation 9021. Up to 3611 conditions per place. [2023-11-23 21:37:04,873 INFO L140 encePairwiseOnDemand]: 113/116 looper letters, 82 selfloop transitions, 1 changer transitions 0/137 dead transitions. [2023-11-23 21:37:04,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 137 transitions, 608 flow [2023-11-23 21:37:04,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:37:04,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 21:37:04,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 244 transitions. [2023-11-23 21:37:04,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7011494252873564 [2023-11-23 21:37:04,876 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 244 transitions. [2023-11-23 21:37:04,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 244 transitions. [2023-11-23 21:37:04,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 21:37:04,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 244 transitions. [2023-11-23 21:37:04,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:04,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:04,880 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:04,880 INFO L175 Difference]: Start difference. First operand has 112 places, 139 transitions, 446 flow. Second operand 3 states and 244 transitions. [2023-11-23 21:37:04,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 137 transitions, 608 flow [2023-11-23 21:37:04,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 137 transitions, 607 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 21:37:04,886 INFO L231 Difference]: Finished difference. Result has 111 places, 137 transitions, 443 flow [2023-11-23 21:37:04,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=443, PETRI_PLACES=111, PETRI_TRANSITIONS=137} [2023-11-23 21:37:04,888 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 1 predicate places. [2023-11-23 21:37:04,888 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 137 transitions, 443 flow [2023-11-23 21:37:04,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.75) internal successors, (267), 4 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:04,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 21:37:04,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:04,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-23 21:37:05,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:37:05,092 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 21:37:05,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:05,093 INFO L85 PathProgramCache]: Analyzing trace with hash -976366529, now seen corresponding path program 1 times [2023-11-23 21:37:05,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 21:37:05,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2073102337] [2023-11-23 21:37:05,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:05,094 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 [2023-11-23 21:37:05,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat [2023-11-23 21:37:05,095 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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) [2023-11-23 21:37:05,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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 [2023-11-23 21:37:05,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:05,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 21:37:05,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:37:05,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:05,293 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-23 21:37:05,293 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 [2023-11-23 21:37:05,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:05,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:05,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:05,331 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 15 treesize of output 1 [2023-11-23 21:37:05,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:05,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:05,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:05,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:05,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2023-11-23 21:37:05,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:05,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:05,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:05,449 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 21:37:05,449 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 [2023-11-23 21:37:05,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:05,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:05,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:05,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2023-11-23 21:37:05,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:05,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:05,531 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 21:37:05,532 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 [2023-11-23 21:37:05,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:05,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:05,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:05,584 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 21:37:05,584 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 [2023-11-23 21:37:05,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:05,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:05,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:05,612 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 15 treesize of output 1 [2023-11-23 21:37:05,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:05,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-23 21:37:05,696 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 21:37:05,696 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 [2023-11-23 21:37:05,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:05,786 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:37:05,787 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 21:37:05,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2073102337] [2023-11-23 21:37:05,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2073102337] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:05,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:05,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:37:05,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572276764] [2023-11-23 21:37:05,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:05,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:37:05,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 21:37:05,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:37:05,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:37:06,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 116 [2023-11-23 21:37:06,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 137 transitions, 443 flow. Second operand has 4 states, 4 states have (on average 66.75) internal successors, (267), 4 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:06,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 21:37:06,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 116 [2023-11-23 21:37:06,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 21:37:07,103 INFO L124 PetriNetUnfolderBase]: 2724/5266 cut-off events. [2023-11-23 21:37:07,103 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2023-11-23 21:37:07,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9027 conditions, 5266 events. 2724/5266 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 39005 event pairs, 1692 based on Foata normal form. 49/3633 useless extension candidates. Maximal degree in co-relation 9012. Up to 3611 conditions per place. [2023-11-23 21:37:07,145 INFO L140 encePairwiseOnDemand]: 113/116 looper letters, 82 selfloop transitions, 1 changer transitions 0/135 dead transitions. [2023-11-23 21:37:07,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 135 transitions, 605 flow [2023-11-23 21:37:07,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:37:07,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 21:37:07,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 244 transitions. [2023-11-23 21:37:07,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7011494252873564 [2023-11-23 21:37:07,147 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 244 transitions. [2023-11-23 21:37:07,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 244 transitions. [2023-11-23 21:37:07,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 21:37:07,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 244 transitions. [2023-11-23 21:37:07,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:07,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:07,150 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:07,150 INFO L175 Difference]: Start difference. First operand has 111 places, 137 transitions, 443 flow. Second operand 3 states and 244 transitions. [2023-11-23 21:37:07,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 135 transitions, 605 flow [2023-11-23 21:37:07,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 135 transitions, 604 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 21:37:07,155 INFO L231 Difference]: Finished difference. Result has 110 places, 135 transitions, 440 flow [2023-11-23 21:37:07,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=440, PETRI_PLACES=110, PETRI_TRANSITIONS=135} [2023-11-23 21:37:07,156 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 0 predicate places. [2023-11-23 21:37:07,156 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 135 transitions, 440 flow [2023-11-23 21:37:07,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.75) internal successors, (267), 4 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:07,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 21:37:07,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:37:07,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-23 21:37:07,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:37:07,358 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 21:37:07,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:07,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1982787073, now seen corresponding path program 1 times [2023-11-23 21:37:07,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 21:37:07,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [396348599] [2023-11-23 21:37:07,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:37:07,358 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 [2023-11-23 21:37:07,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat [2023-11-23 21:37:07,360 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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) [2023-11-23 21:37:07,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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 [2023-11-23 21:37:07,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:37:07,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:37:07,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:37:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:07,580 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:37:07,580 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 21:37:07,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [396348599] [2023-11-23 21:37:07,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [396348599] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:37:07,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:37:07,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:37:07,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924354294] [2023-11-23 21:37:07,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:37:07,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:37:07,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 21:37:07,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:37:07,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:37:07,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 116 [2023-11-23 21:37:07,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 135 transitions, 440 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:07,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 21:37:07,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 116 [2023-11-23 21:37:07,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 21:37:09,107 INFO L124 PetriNetUnfolderBase]: 5214/9820 cut-off events. [2023-11-23 21:37:09,107 INFO L125 PetriNetUnfolderBase]: For 145/145 co-relation queries the response was YES. [2023-11-23 21:37:09,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17058 conditions, 9820 events. 5214/9820 cut-off events. For 145/145 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 78584 event pairs, 2894 based on Foata normal form. 0/6737 useless extension candidates. Maximal degree in co-relation 17042. Up to 4058 conditions per place. [2023-11-23 21:37:09,168 INFO L140 encePairwiseOnDemand]: 110/116 looper letters, 166 selfloop transitions, 5 changer transitions 0/222 dead transitions. [2023-11-23 21:37:09,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 222 transitions, 1051 flow [2023-11-23 21:37:09,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:37:09,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 21:37:09,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 445 transitions. [2023-11-23 21:37:09,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7672413793103449 [2023-11-23 21:37:09,171 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 445 transitions. [2023-11-23 21:37:09,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 445 transitions. [2023-11-23 21:37:09,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 21:37:09,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 445 transitions. [2023-11-23 21:37:09,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:09,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:09,176 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:09,177 INFO L175 Difference]: Start difference. First operand has 110 places, 135 transitions, 440 flow. Second operand 5 states and 445 transitions. [2023-11-23 21:37:09,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 222 transitions, 1051 flow [2023-11-23 21:37:09,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 222 transitions, 1050 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 21:37:09,184 INFO L231 Difference]: Finished difference. Result has 115 places, 137 transitions, 464 flow [2023-11-23 21:37:09,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=464, PETRI_PLACES=115, PETRI_TRANSITIONS=137} [2023-11-23 21:37:09,185 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 5 predicate places. [2023-11-23 21:37:09,186 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 137 transitions, 464 flow [2023-11-23 21:37:09,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:09,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 21:37:09,186 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-23 21:37:09,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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 [2023-11-23 21:37:09,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:37:09,389 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 21:37:09,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:37:09,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1497580074, now seen corresponding path program 2 times [2023-11-23 21:37:09,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-23 21:37:09,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058828042] [2023-11-23 21:37:09,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 21:37:09,390 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 [2023-11-23 21:37:09,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat [2023-11-23 21:37:09,391 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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) [2023-11-23 21:37:09,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cc8b8b-74d7-4e07-b4c7-49059cd37f7a/bin/uautomizer-verify-zZY32mL2XJ/mathsat -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 [2023-11-23 21:37:09,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 21:37:09,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:37:09,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:37:09,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:37:09,538 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 8 treesize of output 7 [2023-11-23 21:37:09,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:09,553 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 [2023-11-23 21:37:09,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:09,577 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 [2023-11-23 21:37:09,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:09,589 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 [2023-11-23 21:37:09,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:09,603 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 [2023-11-23 21:37:09,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:09,611 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 [2023-11-23 21:37:09,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:09,622 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 [2023-11-23 21:37:09,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:09,633 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 [2023-11-23 21:37:09,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:09,642 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 [2023-11-23 21:37:09,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:09,655 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 [2023-11-23 21:37:09,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:09,670 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 [2023-11-23 21:37:09,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:09,691 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 [2023-11-23 21:37:09,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:09,707 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 [2023-11-23 21:37:09,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:09,730 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 [2023-11-23 21:37:09,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:09,742 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 [2023-11-23 21:37:09,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:09,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 21:37:09,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:09,763 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 [2023-11-23 21:37:09,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:09,774 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 [2023-11-23 21:37:09,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:09,806 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 [2023-11-23 21:37:09,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:09,842 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 [2023-11-23 21:37:09,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:09,866 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 [2023-11-23 21:37:09,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:09,878 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 [2023-11-23 21:37:09,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:09,893 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 [2023-11-23 21:37:09,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:37:09,916 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 [2023-11-23 21:37:10,249 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:10,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:37:11,357 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:37:11,357 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-23 21:37:11,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058828042] [2023-11-23 21:37:11,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2058828042] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:37:11,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:37:11,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-23 21:37:11,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680253900] [2023-11-23 21:37:11,357 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:37:11,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 21:37:11,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-23 21:37:11,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 21:37:11,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-23 21:37:19,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 116 [2023-11-23 21:37:19,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 137 transitions, 464 flow. Second operand has 14 states, 14 states have (on average 65.57142857142857) internal successors, (918), 14 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:37:19,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 21:37:19,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 116 [2023-11-23 21:37:19,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 21:37:25,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:37:27,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []