./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:27:07,198 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:27:07,320 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:27:07,330 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:27:07,331 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:27:07,371 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:27:07,372 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:27:07,373 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:27:07,374 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:27:07,379 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:27:07,379 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:27:07,381 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:27:07,381 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:27:07,383 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:27:07,384 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:27:07,384 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:27:07,385 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:27:07,385 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:27:07,386 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:27:07,386 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:27:07,387 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:27:07,387 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:27:07,388 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:27:07,388 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:27:07,389 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:27:07,389 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:27:07,389 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:27:07,390 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:27:07,401 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:27:07,401 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:27:07,403 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:27:07,403 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:27:07,404 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:27:07,404 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:27:07,404 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:27:07,405 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:27:07,405 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:27:07,405 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:27:07,406 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:27:07,406 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:27:07,406 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:27:07,407 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_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 [2023-11-24 21:27:07,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:27:07,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:27:07,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:27:07,735 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:27:07,736 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:27:07,737 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2023-11-24 21:27:10,897 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:27:11,116 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:27:11,117 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2023-11-24 21:27:11,126 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/data/1cccb9fb1/310d5e3be1c34d20a478734566cd6bc2/FLAGd25e801eb [2023-11-24 21:27:11,141 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/data/1cccb9fb1/310d5e3be1c34d20a478734566cd6bc2 [2023-11-24 21:27:11,144 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:27:11,146 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:27:11,147 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:27:11,148 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:27:11,153 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:27:11,154 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:27:11" (1/1) ... [2023-11-24 21:27:11,155 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39e4b5d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:11, skipping insertion in model container [2023-11-24 21:27:11,155 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:27:11" (1/1) ... [2023-11-24 21:27:11,179 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:27:11,480 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:27:11,499 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-11-24 21:27:11,500 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4031b1f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:11, skipping insertion in model container [2023-11-24 21:27:11,500 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:27:11,501 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-24 21:27:11,503 INFO L158 Benchmark]: Toolchain (without parser) took 356.26ms. Allocated memory is still 188.7MB. Free memory was 139.5MB in the beginning and 129.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-24 21:27:11,504 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 188.7MB. Free memory is still 157.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 21:27:11,505 INFO L158 Benchmark]: CACSL2BoogieTranslator took 353.60ms. Allocated memory is still 188.7MB. Free memory was 139.5MB in the beginning and 129.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-24 21:27:11,507 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 188.7MB. Free memory is still 157.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 353.60ms. Allocated memory is still 188.7MB. Free memory was 139.5MB in the beginning and 129.1MB 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: 101]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:27:13,974 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:27:14,106 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-24 21:27:14,116 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:27:14,117 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:27:14,162 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:27:14,163 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:27:14,164 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:27:14,165 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:27:14,167 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:27:14,168 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:27:14,168 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:27:14,169 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:27:14,170 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:27:14,170 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:27:14,171 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:27:14,172 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:27:14,172 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:27:14,173 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:27:14,173 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:27:14,174 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:27:14,174 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:27:14,175 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:27:14,175 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:27:14,176 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:27:14,176 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-24 21:27:14,177 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-24 21:27:14,177 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:27:14,178 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:27:14,178 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:27:14,180 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:27:14,180 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:27:14,181 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:27:14,181 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:27:14,181 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:27:14,182 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:27:14,183 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:27:14,183 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-24 21:27:14,183 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-24 21:27:14,184 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:27:14,184 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:27:14,184 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:27:14,185 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:27:14,185 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-24 21:27:14,185 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_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 [2023-11-24 21:27:14,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:27:14,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:27:14,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:27:14,590 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:27:14,591 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:27:14,592 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2023-11-24 21:27:17,756 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:27:18,021 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:27:18,022 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2023-11-24 21:27:18,034 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/data/ae6ed0c56/d3174e41d255405fbbc9815ac208edce/FLAG45d422013 [2023-11-24 21:27:18,059 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/data/ae6ed0c56/d3174e41d255405fbbc9815ac208edce [2023-11-24 21:27:18,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:27:18,069 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:27:18,071 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:27:18,071 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:27:18,077 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:27:18,078 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:27:18" (1/1) ... [2023-11-24 21:27:18,079 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58fa8ff1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:18, skipping insertion in model container [2023-11-24 21:27:18,080 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:27:18" (1/1) ... [2023-11-24 21:27:18,134 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:27:18,354 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:27:18,370 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-24 21:27:18,385 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:27:18,427 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:27:18,446 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:27:18,503 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:27:18,534 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:27:18,534 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:18 WrapperNode [2023-11-24 21:27:18,535 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:27:18,536 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:27:18,536 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:27:18,537 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:27:18,546 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:18" (1/1) ... [2023-11-24 21:27:18,577 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:18" (1/1) ... [2023-11-24 21:27:18,627 INFO L138 Inliner]: procedures = 27, calls = 40, calls flagged for inlining = 14, calls inlined = 18, statements flattened = 201 [2023-11-24 21:27:18,627 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:27:18,629 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:27:18,629 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:27:18,630 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:27:18,642 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:18" (1/1) ... [2023-11-24 21:27:18,643 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:18" (1/1) ... [2023-11-24 21:27:18,665 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:18" (1/1) ... [2023-11-24 21:27:18,701 INFO L175 MemorySlicer]: Split 16 memory accesses to 4 slices as follows [2, 10, 2, 2]. 63 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 4 writes are split as follows [0, 2, 1, 1]. [2023-11-24 21:27:18,702 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:18" (1/1) ... [2023-11-24 21:27:18,702 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:18" (1/1) ... [2023-11-24 21:27:18,724 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:18" (1/1) ... [2023-11-24 21:27:18,739 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:18" (1/1) ... [2023-11-24 21:27:18,744 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:18" (1/1) ... [2023-11-24 21:27:18,748 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:18" (1/1) ... [2023-11-24 21:27:18,756 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:27:18,757 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:27:18,757 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:27:18,757 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:27:18,758 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:18" (1/1) ... [2023-11-24 21:27:18,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:27:18,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:27:18,794 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:27:18,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:27:18,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:27:18,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-24 21:27:18,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-24 21:27:18,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-24 21:27:18,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-24 21:27:18,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:27:18,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-24 21:27:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-24 21:27:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-24 21:27:18,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-24 21:27:18,860 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-24 21:27:18,860 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-24 21:27:18,860 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-24 21:27:18,861 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-24 21:27:18,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:27:18,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:27:18,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:27:18,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:27:18,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-24 21:27:18,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-24 21:27:18,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-24 21:27:18,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-24 21:27:18,867 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:27:19,021 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:27:19,024 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:27:19,731 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:27:20,115 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:27:20,116 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-24 21:27:20,116 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:27:20 BoogieIcfgContainer [2023-11-24 21:27:20,117 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:27:20,120 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:27:20,120 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:27:20,123 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:27:20,124 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:27:18" (1/3) ... [2023-11-24 21:27:20,124 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7417ad47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:27:20, skipping insertion in model container [2023-11-24 21:27:20,125 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:18" (2/3) ... [2023-11-24 21:27:20,127 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7417ad47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:27:20, skipping insertion in model container [2023-11-24 21:27:20,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:27:20" (3/3) ... [2023-11-24 21:27:20,130 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-symm.wvr.c [2023-11-24 21:27:20,151 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:27:20,151 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-11-24 21:27:20,152 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:27:20,254 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-24 21:27:20,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 73 transitions, 160 flow [2023-11-24 21:27:20,369 INFO L124 PetriNetUnfolderBase]: 6/71 cut-off events. [2023-11-24 21:27:20,369 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 21:27:20,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 71 events. 6/71 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 199 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-11-24 21:27:20,376 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 73 transitions, 160 flow [2023-11-24 21:27:20,413 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 70 transitions, 152 flow [2023-11-24 21:27:20,431 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:27:20,444 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;@686bd285, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:27:20,445 INFO L358 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2023-11-24 21:27:20,451 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:27:20,452 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-24 21:27:20,452 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:27:20,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:27:20,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:27:20,454 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-24 21:27:20,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:20,460 INFO L85 PathProgramCache]: Analyzing trace with hash 660078, now seen corresponding path program 1 times [2023-11-24 21:27:20,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:27:20,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [185644132] [2023-11-24 21:27:20,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:20,483 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:27:20,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:27:20,486 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:27:20,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-24 21:27:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:20,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:27:20,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:27:20,688 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 [2023-11-24 21:27:20,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:20,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:27:20,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:20,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:27:20,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:20,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-24 21:27:20,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:20,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:27:20,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:20,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-24 21:27:20,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:27:20,755 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:27:20,755 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:27:20,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [185644132] [2023-11-24 21:27:20,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [185644132] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:27:20,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:27:20,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:27:20,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784194789] [2023-11-24 21:27:20,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:27:20,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:27:20,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:27:20,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:27:20,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:27:21,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 73 [2023-11-24 21:27:21,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:21,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:27:21,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 73 [2023-11-24 21:27:21,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:27:21,298 INFO L124 PetriNetUnfolderBase]: 116/366 cut-off events. [2023-11-24 21:27:21,298 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-24 21:27:21,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 576 conditions, 366 events. 116/366 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2047 event pairs, 68 based on Foata normal form. 1/233 useless extension candidates. Maximal degree in co-relation 500. Up to 183 conditions per place. [2023-11-24 21:27:21,307 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 24 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-11-24 21:27:21,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 66 transitions, 196 flow [2023-11-24 21:27:21,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:27:21,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:27:21,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 158 transitions. [2023-11-24 21:27:21,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7214611872146118 [2023-11-24 21:27:21,324 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 158 transitions. [2023-11-24 21:27:21,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 158 transitions. [2023-11-24 21:27:21,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:27:21,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 158 transitions. [2023-11-24 21:27:21,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:21,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:21,337 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:21,339 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 152 flow. Second operand 3 states and 158 transitions. [2023-11-24 21:27:21,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 66 transitions, 196 flow [2023-11-24 21:27:21,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 66 transitions, 188 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:27:21,347 INFO L231 Difference]: Finished difference. Result has 65 places, 66 transitions, 140 flow [2023-11-24 21:27:21,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=65, PETRI_TRANSITIONS=66} [2023-11-24 21:27:21,354 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -6 predicate places. [2023-11-24 21:27:21,354 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 140 flow [2023-11-24 21:27:21,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:21,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:27:21,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:27:21,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:27:21,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:27:21,558 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-24 21:27:21,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:21,558 INFO L85 PathProgramCache]: Analyzing trace with hash 660079, now seen corresponding path program 1 times [2023-11-24 21:27:21,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:27:21,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [249114613] [2023-11-24 21:27:21,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:21,559 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:27:21,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:27:21,561 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:27:21,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-24 21:27:21,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:21,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 21:27:21,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:27:21,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-24 21:27:21,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:21,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:27:21,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:21,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:27:21,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:21,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:27:21,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:21,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:27:21,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:21,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:27:21,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:27:21,899 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:27:21,899 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:27:21,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [249114613] [2023-11-24 21:27:21,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [249114613] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:27:21,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:27:21,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:27:21,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445681906] [2023-11-24 21:27:21,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:27:21,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:27:21,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:27:21,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:27:21,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:27:22,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 73 [2023-11-24 21:27:22,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 140 flow. Second operand has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:22,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:27:22,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 73 [2023-11-24 21:27:22,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:27:22,842 INFO L124 PetriNetUnfolderBase]: 118/372 cut-off events. [2023-11-24 21:27:22,842 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-24 21:27:22,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 580 conditions, 372 events. 118/372 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2065 event pairs, 68 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 544. Up to 192 conditions per place. [2023-11-24 21:27:22,852 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 27 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2023-11-24 21:27:22,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 72 transitions, 222 flow [2023-11-24 21:27:22,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:27:22,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:27:22,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 208 transitions. [2023-11-24 21:27:22,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7123287671232876 [2023-11-24 21:27:22,864 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 208 transitions. [2023-11-24 21:27:22,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 208 transitions. [2023-11-24 21:27:22,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:27:22,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 208 transitions. [2023-11-24 21:27:22,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:22,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 73.0) internal successors, (365), 5 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:22,875 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 73.0) internal successors, (365), 5 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:22,875 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 140 flow. Second operand 4 states and 208 transitions. [2023-11-24 21:27:22,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 72 transitions, 222 flow [2023-11-24 21:27:22,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 72 transitions, 216 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:27:22,881 INFO L231 Difference]: Finished difference. Result has 69 places, 72 transitions, 192 flow [2023-11-24 21:27:22,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=192, PETRI_PLACES=69, PETRI_TRANSITIONS=72} [2023-11-24 21:27:22,882 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -2 predicate places. [2023-11-24 21:27:22,883 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 72 transitions, 192 flow [2023-11-24 21:27:22,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:22,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:27:22,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-24 21:27:22,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:27:23,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:27:23,087 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-24 21:27:23,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:23,087 INFO L85 PathProgramCache]: Analyzing trace with hash 20464166, now seen corresponding path program 1 times [2023-11-24 21:27:23,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:27:23,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [517219482] [2023-11-24 21:27:23,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:23,088 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:27:23,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:27:23,089 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:27:23,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-24 21:27:23,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:23,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 21:27:23,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:27:23,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:23,255 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-24 21:27:23,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 15 [2023-11-24 21:27:23,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:23,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:23,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2023-11-24 21:27:23,383 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:27:23,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-24 21:27:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:27:23,425 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:27:23,426 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:27:23,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [517219482] [2023-11-24 21:27:23,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [517219482] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:27:23,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:27:23,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:27:23,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530428335] [2023-11-24 21:27:23,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:27:23,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:27:23,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:27:23,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:27:23,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:27:23,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 73 [2023-11-24 21:27:23,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 72 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:23,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:27:23,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 73 [2023-11-24 21:27:23,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:27:23,833 INFO L124 PetriNetUnfolderBase]: 118/366 cut-off events. [2023-11-24 21:27:23,833 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-24 21:27:23,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 593 conditions, 366 events. 118/366 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2005 event pairs, 68 based on Foata normal form. 26/265 useless extension candidates. Maximal degree in co-relation 549. Up to 194 conditions per place. [2023-11-24 21:27:23,842 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 31 selfloop transitions, 1 changer transitions 0/70 dead transitions. [2023-11-24 21:27:23,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 70 transitions, 252 flow [2023-11-24 21:27:23,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:27:23,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:27:23,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2023-11-24 21:27:23,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7168949771689498 [2023-11-24 21:27:23,846 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 157 transitions. [2023-11-24 21:27:23,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 157 transitions. [2023-11-24 21:27:23,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:27:23,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 157 transitions. [2023-11-24 21:27:23,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:23,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:23,850 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:23,851 INFO L175 Difference]: Start difference. First operand has 69 places, 72 transitions, 192 flow. Second operand 3 states and 157 transitions. [2023-11-24 21:27:23,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 70 transitions, 252 flow [2023-11-24 21:27:23,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 70 transitions, 252 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 21:27:23,856 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 190 flow [2023-11-24 21:27:23,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2023-11-24 21:27:23,858 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -2 predicate places. [2023-11-24 21:27:23,858 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 190 flow [2023-11-24 21:27:23,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:23,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:27:23,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-24 21:27:23,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:27:24,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:27:24,063 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-24 21:27:24,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:24,063 INFO L85 PathProgramCache]: Analyzing trace with hash 20464167, now seen corresponding path program 1 times [2023-11-24 21:27:24,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:27:24,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [215957937] [2023-11-24 21:27:24,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:24,064 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:27:24,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:27:24,066 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:27:24,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-24 21:27:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:24,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 21:27:24,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:27:24,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:24,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-24 21:27:24,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:24,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-24 21:27:24,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:24,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:24,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:24,293 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 [2023-11-24 21:27:24,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:24,351 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 [2023-11-24 21:27:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:27:24,416 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:27:24,416 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:27:24,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [215957937] [2023-11-24 21:27:24,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [215957937] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:27:24,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:27:24,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:27:24,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014655536] [2023-11-24 21:27:24,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:27:24,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:27:24,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:27:24,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:27:24,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:27:24,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 73 [2023-11-24 21:27:24,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 190 flow. Second operand has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:24,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:27:24,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 73 [2023-11-24 21:27:24,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:27:25,036 INFO L124 PetriNetUnfolderBase]: 118/360 cut-off events. [2023-11-24 21:27:25,036 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-24 21:27:25,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 360 events. 118/360 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1951 event pairs, 68 based on Foata normal form. 26/265 useless extension candidates. Maximal degree in co-relation 578. Up to 194 conditions per place. [2023-11-24 21:27:25,041 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 31 selfloop transitions, 1 changer transitions 0/68 dead transitions. [2023-11-24 21:27:25,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 68 transitions, 250 flow [2023-11-24 21:27:25,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:27:25,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:27:25,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2023-11-24 21:27:25,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7168949771689498 [2023-11-24 21:27:25,043 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 157 transitions. [2023-11-24 21:27:25,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 157 transitions. [2023-11-24 21:27:25,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:27:25,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 157 transitions. [2023-11-24 21:27:25,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:25,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:25,046 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:25,047 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 190 flow. Second operand 3 states and 157 transitions. [2023-11-24 21:27:25,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 68 transitions, 250 flow [2023-11-24 21:27:25,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 68 transitions, 249 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:27:25,051 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 187 flow [2023-11-24 21:27:25,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=187, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2023-11-24 21:27:25,052 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2023-11-24 21:27:25,053 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 187 flow [2023-11-24 21:27:25,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:25,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:27:25,053 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-24 21:27:25,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:27:25,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:27:25,256 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-24 21:27:25,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:25,256 INFO L85 PathProgramCache]: Analyzing trace with hash 634356933, now seen corresponding path program 1 times [2023-11-24 21:27:25,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:27:25,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1142407763] [2023-11-24 21:27:25,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:25,257 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:27:25,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:27:25,259 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:27:25,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-24 21:27:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:25,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 21:27:25,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:27:25,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-24 21:27:25,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:25,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:27:25,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:25,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-24 21:27:25,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:25,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:27:25,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:25,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:27:25,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:25,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:27:25,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:27:25,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:27:26,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:27:26,217 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:27:26,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1142407763] [2023-11-24 21:27:26,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1142407763] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:27:26,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:27:26,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-24 21:27:26,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728169969] [2023-11-24 21:27:26,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:27:26,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:27:26,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:27:26,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:27:26,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:27:28,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 73 [2023-11-24 21:27:28,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 187 flow. Second operand has 10 states, 10 states have (on average 44.0) internal successors, (440), 10 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:28,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:27:28,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 73 [2023-11-24 21:27:28,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:27:31,234 INFO L124 PetriNetUnfolderBase]: 124/378 cut-off events. [2023-11-24 21:27:31,234 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-24 21:27:31,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 649 conditions, 378 events. 124/378 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2050 event pairs, 68 based on Foata normal form. 0/252 useless extension candidates. Maximal degree in co-relation 637. Up to 195 conditions per place. [2023-11-24 21:27:31,238 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 27 selfloop transitions, 25 changer transitions 0/86 dead transitions. [2023-11-24 21:27:31,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 86 transitions, 369 flow [2023-11-24 21:27:31,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:27:31,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-24 21:27:31,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 488 transitions. [2023-11-24 21:27:31,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6684931506849315 [2023-11-24 21:27:31,243 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 488 transitions. [2023-11-24 21:27:31,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 488 transitions. [2023-11-24 21:27:31,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:27:31,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 488 transitions. [2023-11-24 21:27:31,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 48.8) internal successors, (488), 10 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:31,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 73.0) internal successors, (803), 11 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:31,249 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 73.0) internal successors, (803), 11 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:31,249 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 187 flow. Second operand 10 states and 488 transitions. [2023-11-24 21:27:31,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 86 transitions, 369 flow [2023-11-24 21:27:31,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 86 transitions, 368 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:27:31,253 INFO L231 Difference]: Finished difference. Result has 79 places, 86 transitions, 348 flow [2023-11-24 21:27:31,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=348, PETRI_PLACES=79, PETRI_TRANSITIONS=86} [2023-11-24 21:27:31,254 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 8 predicate places. [2023-11-24 21:27:31,254 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 86 transitions, 348 flow [2023-11-24 21:27:31,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 44.0) internal successors, (440), 10 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:31,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:27:31,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:27:31,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:27:31,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:27:31,458 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-24 21:27:31,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:31,458 INFO L85 PathProgramCache]: Analyzing trace with hash -236715033, now seen corresponding path program 1 times [2023-11-24 21:27:31,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:27:31,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1215784695] [2023-11-24 21:27:31,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:31,459 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:27:31,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:27:31,460 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:27:31,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-24 21:27:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:31,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:27:31,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:27:31,595 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-24 21:27:31,595 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 21 treesize of output 15 [2023-11-24 21:27:31,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:31,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:31,647 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-24 21:27:31,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-24 21:27:31,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:31,665 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-24 21:27:31,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-24 21:27:31,702 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:27:31,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-24 21:27:31,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:27:31,723 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:27:31,723 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:27:31,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1215784695] [2023-11-24 21:27:31,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1215784695] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:27:31,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:27:31,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:27:31,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840342314] [2023-11-24 21:27:31,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:27:31,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:27:31,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:27:31,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:27:31,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:27:31,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 73 [2023-11-24 21:27:31,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 86 transitions, 348 flow. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:31,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:27:31,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 73 [2023-11-24 21:27:31,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:27:31,990 INFO L124 PetriNetUnfolderBase]: 136/404 cut-off events. [2023-11-24 21:27:31,991 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-24 21:27:31,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 740 conditions, 404 events. 136/404 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2172 event pairs, 76 based on Foata normal form. 0/281 useless extension candidates. Maximal degree in co-relation 724. Up to 234 conditions per place. [2023-11-24 21:27:31,995 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 51 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2023-11-24 21:27:31,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 84 transitions, 448 flow [2023-11-24 21:27:31,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:27:31,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:27:31,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 153 transitions. [2023-11-24 21:27:31,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6986301369863014 [2023-11-24 21:27:31,997 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 153 transitions. [2023-11-24 21:27:31,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 153 transitions. [2023-11-24 21:27:31,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:27:31,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 153 transitions. [2023-11-24 21:27:31,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:31,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:32,000 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:32,000 INFO L175 Difference]: Start difference. First operand has 79 places, 86 transitions, 348 flow. Second operand 3 states and 153 transitions. [2023-11-24 21:27:32,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 84 transitions, 448 flow [2023-11-24 21:27:32,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 84 transitions, 384 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-11-24 21:27:32,006 INFO L231 Difference]: Finished difference. Result has 75 places, 84 transitions, 282 flow [2023-11-24 21:27:32,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=282, PETRI_PLACES=75, PETRI_TRANSITIONS=84} [2023-11-24 21:27:32,007 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2023-11-24 21:27:32,008 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 84 transitions, 282 flow [2023-11-24 21:27:32,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:32,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:27:32,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:27:32,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-24 21:27:32,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:27:32,216 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-24 21:27:32,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:32,217 INFO L85 PathProgramCache]: Analyzing trace with hash -236715032, now seen corresponding path program 1 times [2023-11-24 21:27:32,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:27:32,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1883997397] [2023-11-24 21:27:32,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:32,217 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:27:32,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:27:32,219 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:27:32,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-24 21:27:32,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:32,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:27:32,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:27:32,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:32,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-24 21:27:32,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:32,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:32,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-24 21:27:32,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:32,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:32,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-24 21:27:32,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:32,457 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 [2023-11-24 21:27:32,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:27:32,563 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:27:32,563 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:27:32,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1883997397] [2023-11-24 21:27:32,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1883997397] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:27:32,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:27:32,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:27:32,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121237224] [2023-11-24 21:27:32,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:27:32,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:27:32,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:27:32,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:27:32,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:27:32,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 73 [2023-11-24 21:27:32,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 84 transitions, 282 flow. Second operand has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:32,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:27:32,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 73 [2023-11-24 21:27:32,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:27:33,106 INFO L124 PetriNetUnfolderBase]: 124/370 cut-off events. [2023-11-24 21:27:33,106 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-11-24 21:27:33,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 653 conditions, 370 events. 124/370 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2001 event pairs, 68 based on Foata normal form. 9/265 useless extension candidates. Maximal degree in co-relation 638. Up to 212 conditions per place. [2023-11-24 21:27:33,111 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 49 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2023-11-24 21:27:33,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 82 transitions, 378 flow [2023-11-24 21:27:33,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:27:33,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:27:33,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2023-11-24 21:27:33,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7168949771689498 [2023-11-24 21:27:33,113 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 157 transitions. [2023-11-24 21:27:33,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 157 transitions. [2023-11-24 21:27:33,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:27:33,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 157 transitions. [2023-11-24 21:27:33,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:33,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:33,115 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:33,116 INFO L175 Difference]: Start difference. First operand has 75 places, 84 transitions, 282 flow. Second operand 3 states and 157 transitions. [2023-11-24 21:27:33,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 82 transitions, 378 flow [2023-11-24 21:27:33,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 82 transitions, 377 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:27:33,120 INFO L231 Difference]: Finished difference. Result has 74 places, 82 transitions, 279 flow [2023-11-24 21:27:33,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=279, PETRI_PLACES=74, PETRI_TRANSITIONS=82} [2023-11-24 21:27:33,121 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2023-11-24 21:27:33,121 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 82 transitions, 279 flow [2023-11-24 21:27:33,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:33,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:27:33,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:27:33,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-24 21:27:33,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:27:33,325 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-24 21:27:33,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:33,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1251780932, now seen corresponding path program 1 times [2023-11-24 21:27:33,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:27:33,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826706777] [2023-11-24 21:27:33,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:33,326 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:27:33,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:27:33,328 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:27:33,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-24 21:27:33,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:33,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 21:27:33,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:27:33,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:27:33,518 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:27:33,518 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:27:33,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826706777] [2023-11-24 21:27:33,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1826706777] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:27:33,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:27:33,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:27:33,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266642348] [2023-11-24 21:27:33,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:27:33,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:27:33,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:27:33,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:27:33,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:27:33,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 73 [2023-11-24 21:27:33,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 82 transitions, 279 flow. Second operand has 5 states, 5 states have (on average 45.2) internal successors, (226), 5 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:33,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:27:33,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 73 [2023-11-24 21:27:33,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:27:34,149 INFO L124 PetriNetUnfolderBase]: 218/705 cut-off events. [2023-11-24 21:27:34,149 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2023-11-24 21:27:34,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1191 conditions, 705 events. 218/705 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4725 event pairs, 123 based on Foata normal form. 0/476 useless extension candidates. Maximal degree in co-relation 1175. Up to 241 conditions per place. [2023-11-24 21:27:34,157 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 87 selfloop transitions, 4 changer transitions 0/122 dead transitions. [2023-11-24 21:27:34,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 122 transitions, 588 flow [2023-11-24 21:27:34,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:27:34,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:27:34,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 279 transitions. [2023-11-24 21:27:34,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7643835616438356 [2023-11-24 21:27:34,160 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 279 transitions. [2023-11-24 21:27:34,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 279 transitions. [2023-11-24 21:27:34,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:27:34,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 279 transitions. [2023-11-24 21:27:34,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 55.8) internal successors, (279), 5 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:34,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 73.0) internal successors, (438), 6 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:34,163 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 73.0) internal successors, (438), 6 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:34,164 INFO L175 Difference]: Start difference. First operand has 74 places, 82 transitions, 279 flow. Second operand 5 states and 279 transitions. [2023-11-24 21:27:34,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 122 transitions, 588 flow [2023-11-24 21:27:34,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 122 transitions, 587 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:27:34,171 INFO L231 Difference]: Finished difference. Result has 79 places, 83 transitions, 295 flow [2023-11-24 21:27:34,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=295, PETRI_PLACES=79, PETRI_TRANSITIONS=83} [2023-11-24 21:27:34,176 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 8 predicate places. [2023-11-24 21:27:34,177 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 83 transitions, 295 flow [2023-11-24 21:27:34,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.2) internal successors, (226), 5 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:34,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:27:34,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:27:34,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-24 21:27:34,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:27:34,380 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-24 21:27:34,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:34,381 INFO L85 PathProgramCache]: Analyzing trace with hash 321862830, now seen corresponding path program 1 times [2023-11-24 21:27:34,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:27:34,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [901958645] [2023-11-24 21:27:34,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:34,381 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:27:34,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:27:34,383 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:27:34,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-24 21:27:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:34,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 21:27:34,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:27:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:27:34,622 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:27:34,622 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:27:34,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [901958645] [2023-11-24 21:27:34,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [901958645] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:27:34,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:27:34,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:27:34,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109424657] [2023-11-24 21:27:34,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:27:34,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:27:34,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:27:34,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:27:34,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:27:34,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 73 [2023-11-24 21:27:34,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 83 transitions, 295 flow. Second operand has 5 states, 5 states have (on average 45.6) internal successors, (228), 5 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:34,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:27:34,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 73 [2023-11-24 21:27:34,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:27:35,281 INFO L124 PetriNetUnfolderBase]: 358/1191 cut-off events. [2023-11-24 21:27:35,281 INFO L125 PetriNetUnfolderBase]: For 149/149 co-relation queries the response was YES. [2023-11-24 21:27:35,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2028 conditions, 1191 events. 358/1191 cut-off events. For 149/149 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9335 event pairs, 216 based on Foata normal form. 12/839 useless extension candidates. Maximal degree in co-relation 2009. Up to 376 conditions per place. [2023-11-24 21:27:35,291 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 69 selfloop transitions, 9 changer transitions 0/109 dead transitions. [2023-11-24 21:27:35,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 109 transitions, 514 flow [2023-11-24 21:27:35,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:27:35,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:27:35,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 276 transitions. [2023-11-24 21:27:35,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7561643835616438 [2023-11-24 21:27:35,294 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 276 transitions. [2023-11-24 21:27:35,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 276 transitions. [2023-11-24 21:27:35,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:27:35,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 276 transitions. [2023-11-24 21:27:35,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 55.2) internal successors, (276), 5 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:35,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 73.0) internal successors, (438), 6 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:35,298 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 73.0) internal successors, (438), 6 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:35,298 INFO L175 Difference]: Start difference. First operand has 79 places, 83 transitions, 295 flow. Second operand 5 states and 276 transitions. [2023-11-24 21:27:35,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 109 transitions, 514 flow [2023-11-24 21:27:35,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 109 transitions, 510 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-24 21:27:35,303 INFO L231 Difference]: Finished difference. Result has 84 places, 85 transitions, 330 flow [2023-11-24 21:27:35,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=330, PETRI_PLACES=84, PETRI_TRANSITIONS=85} [2023-11-24 21:27:35,304 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 13 predicate places. [2023-11-24 21:27:35,304 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 85 transitions, 330 flow [2023-11-24 21:27:35,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.6) internal successors, (228), 5 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:35,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:27:35,305 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-24 21:27:35,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-11-24 21:27:35,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:27:35,508 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-24 21:27:35,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:35,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1077537479, now seen corresponding path program 2 times [2023-11-24 21:27:35,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:27:35,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843095984] [2023-11-24 21:27:35,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:27:35,509 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:27:35,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:27:35,510 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:27:35,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042bc1ad-3413-4276-979b-f81f1ba0c75e/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-24 21:27:35,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:27:35,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:27:35,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-24 21:27:35,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:27:35,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-24 21:27:35,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:35,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-24 21:27:35,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:35,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:27:35,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:35,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:27:35,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:35,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:27:35,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:35,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-24 21:27:36,137 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:27:36,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:27:37,435 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:27:37,436 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:27:37,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843095984] [2023-11-24 21:27:37,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843095984] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:27:37,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:27:37,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-24 21:27:37,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40797315] [2023-11-24 21:27:37,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:27:37,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 21:27:37,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:27:37,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 21:27:37,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:27:42,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 73 [2023-11-24 21:27:42,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 85 transitions, 330 flow. Second operand has 14 states, 14 states have (on average 44.57142857142857) internal successors, (624), 14 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:42,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:27:42,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 73 [2023-11-24 21:27:42,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:27:48,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 21:27:51,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 21:27:54,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 21:27:56,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 21:27:59,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.97s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 21:28:03,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 21:28:04,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-24 21:28:07,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []