./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --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 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 13:05:13,989 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:05:13,991 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:05:14,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:05:14,010 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:05:14,011 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:05:14,012 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:05:14,014 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:05:14,015 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:05:14,016 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:05:14,018 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:05:14,019 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:05:14,019 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:05:14,020 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:05:14,021 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:05:14,022 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:05:14,023 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:05:14,024 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:05:14,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:05:14,027 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:05:14,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:05:14,029 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:05:14,035 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:05:14,036 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:05:14,039 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:05:14,040 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:05:14,040 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:05:14,041 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:05:14,041 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:05:14,042 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:05:14,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:05:14,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:05:14,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:05:14,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:05:14,046 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:05:14,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:05:14,047 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:05:14,047 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:05:14,047 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:05:14,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:05:14,049 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:05:14,050 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 13:05:14,082 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:05:14,082 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:05:14,082 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:05:14,082 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:05:14,083 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:05:14,083 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:05:14,084 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:05:14,084 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:05:14,084 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:05:14,084 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:05:14,085 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:05:14,085 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 13:05:14,085 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:05:14,085 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:05:14,085 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:05:14,085 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 13:05:14,086 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 13:05:14,086 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 13:05:14,086 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:05:14,086 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 13:05:14,086 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:05:14,086 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:05:14,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:05:14,087 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:05:14,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:05:14,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:05:14,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:05:14,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:05:14,088 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 13:05:14,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 13:05:14,088 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:05:14,088 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:05:14,088 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:05:14,089 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:05:14,089 INFO L138 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_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 [2022-12-13 13:05:14,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:05:14,273 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:05:14,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:05:14,277 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:05:14,277 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:05:14,279 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2022-12-13 13:05:16,832 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:05:17,002 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:05:17,003 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2022-12-13 13:05:17,011 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/data/8e72ce5f4/1c74ce24943647e68e4be4d0fe7330db/FLAG2f98c2ce2 [2022-12-13 13:05:17,403 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/data/8e72ce5f4/1c74ce24943647e68e4be4d0fe7330db [2022-12-13 13:05:17,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:05:17,408 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:05:17,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:05:17,410 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:05:17,415 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:05:17,416 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:05:17" (1/1) ... [2022-12-13 13:05:17,417 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1be2c57d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:05:17, skipping insertion in model container [2022-12-13 13:05:17,417 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:05:17" (1/1) ... [2022-12-13 13:05:17,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:05:17,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:05:17,565 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/sv-benchmarks/c/weaver/chl-word-subst.wvr.c[3345,3358] [2022-12-13 13:05:17,572 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:05:17,580 ERROR L326 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) [2022-12-13 13:05:17,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3340b670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:05:17, skipping insertion in model container [2022-12-13 13:05:17,581 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:05:17,581 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 13:05:17,583 INFO L158 Benchmark]: Toolchain (without parser) took 173.99ms. Allocated memory is still 134.2MB. Free memory was 99.4MB in the beginning and 89.3MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 13:05:17,583 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 134.2MB. Free memory is still 101.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 13:05:17,584 INFO L158 Benchmark]: CACSL2BoogieTranslator took 171.48ms. Allocated memory is still 134.2MB. Free memory was 99.4MB in the beginning and 89.3MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 13:05:17,585 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 134.2MB. Free memory is still 101.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 171.48ms. Allocated memory is still 134.2MB. Free memory was 99.4MB in the beginning and 89.3MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 138]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --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 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 13:05:18,975 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:05:18,977 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:05:19,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:05:19,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:05:19,016 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:05:19,017 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:05:19,018 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:05:19,019 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:05:19,020 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:05:19,021 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:05:19,021 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:05:19,022 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:05:19,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:05:19,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:05:19,024 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:05:19,025 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:05:19,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:05:19,026 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:05:19,028 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:05:19,029 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:05:19,030 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:05:19,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:05:19,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:05:19,034 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:05:19,034 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:05:19,034 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:05:19,035 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:05:19,035 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:05:19,036 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:05:19,036 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:05:19,037 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:05:19,037 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:05:19,038 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:05:19,039 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:05:19,039 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:05:19,039 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:05:19,039 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:05:19,040 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:05:19,040 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:05:19,041 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:05:19,042 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 13:05:19,065 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:05:19,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:05:19,066 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:05:19,066 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:05:19,067 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:05:19,067 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:05:19,068 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:05:19,068 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:05:19,068 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:05:19,068 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:05:19,068 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:05:19,068 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 13:05:19,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:05:19,069 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:05:19,069 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:05:19,069 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 13:05:19,069 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 13:05:19,069 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 13:05:19,069 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:05:19,070 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 13:05:19,070 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 13:05:19,070 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 13:05:19,070 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:05:19,070 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:05:19,070 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:05:19,070 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:05:19,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:05:19,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:05:19,071 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:05:19,071 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:05:19,071 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 13:05:19,071 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 13:05:19,071 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:05:19,072 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:05:19,072 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:05:19,072 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 13:05:19,072 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:05:19,072 INFO L138 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_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98c397d7a260fe673f9e4655b5dca942c114f9b11115010a8eef60e068615ab1 [2022-12-13 13:05:19,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:05:19,349 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:05:19,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:05:19,353 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:05:19,353 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:05:19,354 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2022-12-13 13:05:22,025 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:05:22,195 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:05:22,195 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2022-12-13 13:05:22,201 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/data/7551949f9/b2c078be18464a5b9c705fae9ed6af8a/FLAG3b6ce90f7 [2022-12-13 13:05:22,215 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/data/7551949f9/b2c078be18464a5b9c705fae9ed6af8a [2022-12-13 13:05:22,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:05:22,218 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:05:22,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:05:22,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:05:22,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:05:22,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:05:22" (1/1) ... [2022-12-13 13:05:22,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cd3f368 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:05:22, skipping insertion in model container [2022-12-13 13:05:22,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:05:22" (1/1) ... [2022-12-13 13:05:22,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:05:22,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:05:22,414 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/sv-benchmarks/c/weaver/chl-word-subst.wvr.c[3345,3358] [2022-12-13 13:05:22,425 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:05:22,440 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 13:05:22,445 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:05:22,466 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/sv-benchmarks/c/weaver/chl-word-subst.wvr.c[3345,3358] [2022-12-13 13:05:22,469 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:05:22,473 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 13:05:22,495 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/sv-benchmarks/c/weaver/chl-word-subst.wvr.c[3345,3358] [2022-12-13 13:05:22,498 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:05:22,512 INFO L208 MainTranslator]: Completed translation [2022-12-13 13:05:22,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:05:22 WrapperNode [2022-12-13 13:05:22,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:05:22,513 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 13:05:22,514 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 13:05:22,514 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 13:05:22,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:05:22" (1/1) ... [2022-12-13 13:05:22,530 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:05:22" (1/1) ... [2022-12-13 13:05:22,550 INFO L138 Inliner]: procedures = 27, calls = 45, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 167 [2022-12-13 13:05:22,551 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 13:05:22,551 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 13:05:22,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 13:05:22,551 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 13:05:22,559 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:05:22" (1/1) ... [2022-12-13 13:05:22,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:05:22" (1/1) ... [2022-12-13 13:05:22,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:05:22" (1/1) ... [2022-12-13 13:05:22,563 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:05:22" (1/1) ... [2022-12-13 13:05:22,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:05:22" (1/1) ... [2022-12-13 13:05:22,576 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:05:22" (1/1) ... [2022-12-13 13:05:22,578 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:05:22" (1/1) ... [2022-12-13 13:05:22,580 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:05:22" (1/1) ... [2022-12-13 13:05:22,582 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 13:05:22,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 13:05:22,583 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 13:05:22,583 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 13:05:22,584 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:05:22" (1/1) ... [2022-12-13 13:05:22,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:05:22,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:05:22,611 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 13:05:22,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 13:05:22,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 13:05:22,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 13:05:22,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 13:05:22,651 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 13:05:22,652 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 13:05:22,652 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 13:05:22,652 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 13:05:22,652 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 13:05:22,652 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 13:05:22,653 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 13:05:22,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 13:05:22,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 13:05:22,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 13:05:22,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 13:05:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 13:05:22,655 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 13:05:22,760 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 13:05:22,763 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 13:05:23,467 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 13:05:23,474 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 13:05:23,474 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-13 13:05:23,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:05:23 BoogieIcfgContainer [2022-12-13 13:05:23,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 13:05:23,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 13:05:23,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 13:05:23,483 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 13:05:23,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 01:05:22" (1/3) ... [2022-12-13 13:05:23,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@766d50f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:05:23, skipping insertion in model container [2022-12-13 13:05:23,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:05:22" (2/3) ... [2022-12-13 13:05:23,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@766d50f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:05:23, skipping insertion in model container [2022-12-13 13:05:23,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:05:23" (3/3) ... [2022-12-13 13:05:23,486 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-subst.wvr.c [2022-12-13 13:05:23,504 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 13:05:23,504 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2022-12-13 13:05:23,504 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 13:05:23,594 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 13:05:23,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 328 places, 347 transitions, 718 flow [2022-12-13 13:05:23,732 INFO L130 PetriNetUnfolder]: 29/344 cut-off events. [2022-12-13 13:05:23,732 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 13:05:23,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 344 events. 29/344 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 628 event pairs, 0 based on Foata normal form. 0/271 useless extension candidates. Maximal degree in co-relation 261. Up to 3 conditions per place. [2022-12-13 13:05:23,740 INFO L82 GeneralOperation]: Start removeDead. Operand has 328 places, 347 transitions, 718 flow [2022-12-13 13:05:23,748 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 320 places, 339 transitions, 696 flow [2022-12-13 13:05:23,752 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:05:23,762 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 320 places, 339 transitions, 696 flow [2022-12-13 13:05:23,765 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 320 places, 339 transitions, 696 flow [2022-12-13 13:05:23,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 320 places, 339 transitions, 696 flow [2022-12-13 13:05:23,830 INFO L130 PetriNetUnfolder]: 29/339 cut-off events. [2022-12-13 13:05:23,830 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 13:05:23,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 352 conditions, 339 events. 29/339 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 634 event pairs, 0 based on Foata normal form. 0/267 useless extension candidates. Maximal degree in co-relation 261. Up to 3 conditions per place. [2022-12-13 13:05:23,838 INFO L119 LiptonReduction]: Number of co-enabled transitions 12768 [2022-12-13 13:06:00,001 INFO L134 LiptonReduction]: Checked pairs total: 22832 [2022-12-13 13:06:00,001 INFO L136 LiptonReduction]: Total number of compositions: 379 [2022-12-13 13:06:00,012 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:06:00,016 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;@13fb4849, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:06:00,016 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2022-12-13 13:06:00,018 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 13:06:00,018 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:06:00,018 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:06:00,019 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 13:06:00,019 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 13:06:00,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:06:00,023 INFO L85 PathProgramCache]: Analyzing trace with hash 42689, now seen corresponding path program 1 times [2022-12-13 13:06:00,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:06:00,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [955805333] [2022-12-13 13:06:00,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:06:00,035 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 [2022-12-13 13:06:00,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:06:00,036 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:06:00,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:06:00,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:06:00,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:06:00,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:06:00,255 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 13:06:00,256 INFO L350 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 13:06:00,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:06:00,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:06:00,282 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:06:00,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [955805333] [2022-12-13 13:06:00,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [955805333] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:06:00,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:06:00,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:06:00,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309235664] [2022-12-13 13:06:00,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:06:00,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:06:00,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:06:00,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:06:00,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:06:00,535 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 726 [2022-12-13 13:06:00,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 82 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 311.6666666666667) internal successors, (935), 3 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:00,540 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:06:00,540 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 726 [2022-12-13 13:06:00,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:06:03,433 INFO L130 PetriNetUnfolder]: 20232/26991 cut-off events. [2022-12-13 13:06:03,433 INFO L131 PetriNetUnfolder]: For 410/410 co-relation queries the response was YES. [2022-12-13 13:06:03,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54515 conditions, 26991 events. 20232/26991 cut-off events. For 410/410 co-relation queries the response was YES. Maximal size of possible extension queue 1361. Compared 142219 event pairs, 15757 based on Foata normal form. 0/8337 useless extension candidates. Maximal degree in co-relation 51676. Up to 26991 conditions per place. [2022-12-13 13:06:03,562 INFO L137 encePairwiseOnDemand]: 717/726 looper letters, 73 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2022-12-13 13:06:03,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 74 transitions, 314 flow [2022-12-13 13:06:03,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:06:03,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:06:03,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1015 transitions. [2022-12-13 13:06:03,576 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4660238751147842 [2022-12-13 13:06:03,576 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1015 transitions. [2022-12-13 13:06:03,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1015 transitions. [2022-12-13 13:06:03,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:06:03,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1015 transitions. [2022-12-13 13:06:03,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 338.3333333333333) internal successors, (1015), 3 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:03,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 726.0) internal successors, (2904), 4 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:03,598 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 726.0) internal successors, (2904), 4 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:03,599 INFO L175 Difference]: Start difference. First operand has 81 places, 82 transitions, 182 flow. Second operand 3 states and 1015 transitions. [2022-12-13 13:06:03,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 74 transitions, 314 flow [2022-12-13 13:06:03,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 74 transitions, 302 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 13:06:03,621 INFO L231 Difference]: Finished difference. Result has 69 places, 74 transitions, 156 flow [2022-12-13 13:06:03,623 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=726, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=69, PETRI_TRANSITIONS=74} [2022-12-13 13:06:03,625 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, -12 predicate places. [2022-12-13 13:06:03,626 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 74 transitions, 156 flow [2022-12-13 13:06:03,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 311.6666666666667) internal successors, (935), 3 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:03,626 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:06:03,626 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 13:06:03,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:06:03,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:06:03,829 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 13:06:03,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:06:03,830 INFO L85 PathProgramCache]: Analyzing trace with hash 42690, now seen corresponding path program 1 times [2022-12-13 13:06:03,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:06:03,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084690178] [2022-12-13 13:06:03,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:06:03,833 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 [2022-12-13 13:06:03,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:06:03,837 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:06:03,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:06:03,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:06:03,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 13:06:03,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:06:04,087 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 13:06:04,088 INFO L350 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 13:06:04,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:06:04,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:06:04,119 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:06:04,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084690178] [2022-12-13 13:06:04,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2084690178] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:06:04,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:06:04,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:06:04,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549121512] [2022-12-13 13:06:04,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:06:04,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:06:04,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:06:04,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:06:04,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:06:04,514 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 726 [2022-12-13 13:06:04,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 74 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 311.6666666666667) internal successors, (935), 3 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:04,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:06:04,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 726 [2022-12-13 13:06:04,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:06:09,327 INFO L130 PetriNetUnfolder]: 40463/53978 cut-off events. [2022-12-13 13:06:09,327 INFO L131 PetriNetUnfolder]: For 130/130 co-relation queries the response was YES. [2022-12-13 13:06:09,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108382 conditions, 53978 events. 40463/53978 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 2634. Compared 310288 event pairs, 31514 based on Foata normal form. 0/16673 useless extension candidates. Maximal degree in co-relation 108376. Up to 26992 conditions per place. [2022-12-13 13:06:09,496 INFO L137 encePairwiseOnDemand]: 717/726 looper letters, 138 selfloop transitions, 6 changer transitions 0/144 dead transitions. [2022-12-13 13:06:09,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 144 transitions, 590 flow [2022-12-13 13:06:09,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:06:09,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:06:09,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1080 transitions. [2022-12-13 13:06:09,500 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49586776859504134 [2022-12-13 13:06:09,500 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1080 transitions. [2022-12-13 13:06:09,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1080 transitions. [2022-12-13 13:06:09,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:06:09,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1080 transitions. [2022-12-13 13:06:09,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 360.0) internal successors, (1080), 3 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:09,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 726.0) internal successors, (2904), 4 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:09,506 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 726.0) internal successors, (2904), 4 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:09,507 INFO L175 Difference]: Start difference. First operand has 69 places, 74 transitions, 156 flow. Second operand 3 states and 1080 transitions. [2022-12-13 13:06:09,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 144 transitions, 590 flow [2022-12-13 13:06:09,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 144 transitions, 589 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:06:09,509 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 205 flow [2022-12-13 13:06:09,509 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=726, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2022-12-13 13:06:09,510 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, -9 predicate places. [2022-12-13 13:06:09,510 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 205 flow [2022-12-13 13:06:09,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 311.6666666666667) internal successors, (935), 3 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:09,510 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:06:09,510 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 13:06:09,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-13 13:06:09,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:06:09,711 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 13:06:09,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:06:09,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1331546, now seen corresponding path program 1 times [2022-12-13 13:06:09,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:06:09,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [681110351] [2022-12-13 13:06:09,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:06:09,713 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 [2022-12-13 13:06:09,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:06:09,714 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:06:09,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:06:09,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:06:09,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 13:06:09,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:06:09,869 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 13:06:09,870 INFO L350 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 13:06:09,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:06:09,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:06:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:06:10,122 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:06:10,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [681110351] [2022-12-13 13:06:10,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [681110351] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:06:10,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:06:10,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 13:06:10,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150936202] [2022-12-13 13:06:10,123 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:06:10,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:06:10,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:06:10,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:06:10,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:06:12,187 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 726 [2022-12-13 13:06:12,189 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 205 flow. Second operand has 6 states, 6 states have (on average 297.0) internal successors, (1782), 6 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:12,189 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:06:12,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 726 [2022-12-13 13:06:12,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:06:13,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:06:14,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:06:21,549 INFO L130 PetriNetUnfolder]: 60704/80981 cut-off events. [2022-12-13 13:06:21,549 INFO L131 PetriNetUnfolder]: For 195/195 co-relation queries the response was YES. [2022-12-13 13:06:21,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162641 conditions, 80981 events. 60704/80981 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 3584. Compared 484602 event pairs, 47271 based on Foata normal form. 0/25030 useless extension candidates. Maximal degree in co-relation 162632. Up to 26993 conditions per place. [2022-12-13 13:06:21,851 INFO L137 encePairwiseOnDemand]: 714/726 looper letters, 203 selfloop transitions, 27 changer transitions 0/230 dead transitions. [2022-12-13 13:06:21,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 230 transitions, 1021 flow [2022-12-13 13:06:21,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:06:21,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 13:06:21,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2015 transitions. [2022-12-13 13:06:21,856 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4625803489439853 [2022-12-13 13:06:21,856 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2015 transitions. [2022-12-13 13:06:21,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2015 transitions. [2022-12-13 13:06:21,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:06:21,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2015 transitions. [2022-12-13 13:06:21,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 335.8333333333333) internal successors, (2015), 6 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:21,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 726.0) internal successors, (5082), 7 states have internal predecessors, (5082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:21,866 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 726.0) internal successors, (5082), 7 states have internal predecessors, (5082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:21,866 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 205 flow. Second operand 6 states and 2015 transitions. [2022-12-13 13:06:21,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 230 transitions, 1021 flow [2022-12-13 13:06:21,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 230 transitions, 997 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:06:21,870 INFO L231 Difference]: Finished difference. Result has 79 places, 100 transitions, 397 flow [2022-12-13 13:06:21,870 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=726, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=397, PETRI_PLACES=79, PETRI_TRANSITIONS=100} [2022-12-13 13:06:21,871 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, -2 predicate places. [2022-12-13 13:06:21,871 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 100 transitions, 397 flow [2022-12-13 13:06:21,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 297.0) internal successors, (1782), 6 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:21,872 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:06:21,872 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 13:06:21,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-13 13:06:22,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:06:22,074 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 13:06:22,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:06:22,075 INFO L85 PathProgramCache]: Analyzing trace with hash 41339839, now seen corresponding path program 1 times [2022-12-13 13:06:22,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:06:22,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1438386995] [2022-12-13 13:06:22,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:06:22,077 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 [2022-12-13 13:06:22,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:06:22,080 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:06:22,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:06:22,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:06:22,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 13:06:22,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:06:22,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:06:22,315 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-12-13 13:06:22,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-12-13 13:06:22,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:06:22,557 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 13:06:22,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2022-12-13 13:06:22,813 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-12-13 13:06:22,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 76 [2022-12-13 13:06:23,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:06:23,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:06:23,079 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:06:23,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1438386995] [2022-12-13 13:06:23,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1438386995] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:06:23,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:06:23,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:06:23,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713658164] [2022-12-13 13:06:23,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:06:23,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:06:23,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:06:23,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:06:23,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:06:23,947 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 726 [2022-12-13 13:06:23,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 100 transitions, 397 flow. Second operand has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:23,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:06:23,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 726 [2022-12-13 13:06:23,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:06:29,420 INFO L130 PetriNetUnfolder]: 46590/62748 cut-off events. [2022-12-13 13:06:29,420 INFO L131 PetriNetUnfolder]: For 203/203 co-relation queries the response was YES. [2022-12-13 13:06:29,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126237 conditions, 62748 events. 46590/62748 cut-off events. For 203/203 co-relation queries the response was YES. Maximal size of possible extension queue 2895. Compared 375506 event pairs, 36099 based on Foata normal form. 0/20915 useless extension candidates. Maximal degree in co-relation 126224. Up to 62748 conditions per place. [2022-12-13 13:06:29,673 INFO L137 encePairwiseOnDemand]: 723/726 looper letters, 95 selfloop transitions, 1 changer transitions 0/96 dead transitions. [2022-12-13 13:06:29,673 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 96 transitions, 569 flow [2022-12-13 13:06:29,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:06:29,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:06:29,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1028 transitions. [2022-12-13 13:06:29,676 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4719926538108356 [2022-12-13 13:06:29,676 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1028 transitions. [2022-12-13 13:06:29,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1028 transitions. [2022-12-13 13:06:29,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:06:29,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1028 transitions. [2022-12-13 13:06:29,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 342.6666666666667) internal successors, (1028), 3 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:29,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 726.0) internal successors, (2904), 4 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:29,682 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 726.0) internal successors, (2904), 4 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:29,682 INFO L175 Difference]: Start difference. First operand has 79 places, 100 transitions, 397 flow. Second operand 3 states and 1028 transitions. [2022-12-13 13:06:29,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 96 transitions, 569 flow [2022-12-13 13:06:29,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 96 transitions, 539 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-12-13 13:06:29,684 INFO L231 Difference]: Finished difference. Result has 78 places, 96 transitions, 349 flow [2022-12-13 13:06:29,685 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=726, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=349, PETRI_PLACES=78, PETRI_TRANSITIONS=96} [2022-12-13 13:06:29,685 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, -3 predicate places. [2022-12-13 13:06:29,685 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 96 transitions, 349 flow [2022-12-13 13:06:29,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:29,686 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:06:29,686 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 13:06:29,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-13 13:06:29,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:06:29,888 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 13:06:29,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:06:29,889 INFO L85 PathProgramCache]: Analyzing trace with hash 41339840, now seen corresponding path program 1 times [2022-12-13 13:06:29,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:06:29,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752151796] [2022-12-13 13:06:29,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:06:29,891 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 [2022-12-13 13:06:29,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:06:29,894 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:06:29,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:06:29,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:06:30,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 13:06:30,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:06:30,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:06:30,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:06:30,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:06:30,093 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 13:06:30,093 INFO L350 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 2 case distinctions, treesize of input 15 treesize of output 32 [2022-12-13 13:06:30,122 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-13 13:06:30,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 45 [2022-12-13 13:06:30,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:06:30,166 INFO L350 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 12 treesize of output 14 [2022-12-13 13:06:30,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:06:30,182 INFO L350 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 12 treesize of output 14 [2022-12-13 13:06:30,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:06:30,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:06:30,202 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:06:30,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752151796] [2022-12-13 13:06:30,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752151796] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:06:30,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:06:30,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:06:30,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756661842] [2022-12-13 13:06:30,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:06:30,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:06:30,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:06:30,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:06:30,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:06:30,583 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 726 [2022-12-13 13:06:30,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 96 transitions, 349 flow. Second operand has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:30,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:06:30,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 726 [2022-12-13 13:06:30,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:06:34,451 INFO L130 PetriNetUnfolder]: 32476/44515 cut-off events. [2022-12-13 13:06:34,451 INFO L131 PetriNetUnfolder]: For 207/207 co-relation queries the response was YES. [2022-12-13 13:06:34,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89745 conditions, 44515 events. 32476/44515 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 2058. Compared 266006 event pairs, 24927 based on Foata normal form. 0/16799 useless extension candidates. Maximal degree in co-relation 89731. Up to 44515 conditions per place. [2022-12-13 13:06:34,596 INFO L137 encePairwiseOnDemand]: 723/726 looper letters, 91 selfloop transitions, 1 changer transitions 0/92 dead transitions. [2022-12-13 13:06:34,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 92 transitions, 513 flow [2022-12-13 13:06:34,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:06:34,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:06:34,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1026 transitions. [2022-12-13 13:06:34,599 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47107438016528924 [2022-12-13 13:06:34,599 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1026 transitions. [2022-12-13 13:06:34,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1026 transitions. [2022-12-13 13:06:34,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:06:34,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1026 transitions. [2022-12-13 13:06:34,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 342.0) internal successors, (1026), 3 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:34,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 726.0) internal successors, (2904), 4 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:34,605 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 726.0) internal successors, (2904), 4 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:34,605 INFO L175 Difference]: Start difference. First operand has 78 places, 96 transitions, 349 flow. Second operand 3 states and 1026 transitions. [2022-12-13 13:06:34,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 92 transitions, 513 flow [2022-12-13 13:06:34,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 92 transitions, 512 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:06:34,607 INFO L231 Difference]: Finished difference. Result has 77 places, 92 transitions, 330 flow [2022-12-13 13:06:34,607 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=726, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=330, PETRI_PLACES=77, PETRI_TRANSITIONS=92} [2022-12-13 13:06:34,608 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, -4 predicate places. [2022-12-13 13:06:34,608 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 92 transitions, 330 flow [2022-12-13 13:06:34,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:34,608 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:06:34,609 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 13:06:34,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-13 13:06:34,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:06:34,810 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 13:06:34,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:06:34,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1072911587, now seen corresponding path program 1 times [2022-12-13 13:06:34,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:06:34,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [889279229] [2022-12-13 13:06:34,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:06:34,811 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 [2022-12-13 13:06:34,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:06:34,813 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:06:34,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:06:34,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:06:34,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:06:34,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:06:34,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:06:34,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:06:35,029 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-12-13 13:06:35,029 INFO L350 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 2 case distinctions, treesize of input 15 treesize of output 35 [2022-12-13 13:06:35,040 INFO L350 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 26 treesize of output 24 [2022-12-13 13:06:35,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:06:35,086 INFO L350 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 12 treesize of output 14 [2022-12-13 13:06:35,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:06:35,107 INFO L350 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 12 treesize of output 14 [2022-12-13 13:06:35,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:06:35,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:06:35,150 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:06:35,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [889279229] [2022-12-13 13:06:35,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [889279229] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:06:35,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:06:35,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:06:35,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505899362] [2022-12-13 13:06:35,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:06:35,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:06:35,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:06:35,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:06:35,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:06:35,651 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 726 [2022-12-13 13:06:35,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 92 transitions, 330 flow. Second operand has 4 states, 4 states have (on average 319.5) internal successors, (1278), 4 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:35,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:06:35,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 726 [2022-12-13 13:06:35,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:06:39,648 INFO L130 PetriNetUnfolder]: 31756/43459 cut-off events. [2022-12-13 13:06:39,648 INFO L131 PetriNetUnfolder]: For 207/207 co-relation queries the response was YES. [2022-12-13 13:06:39,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87634 conditions, 43459 events. 31756/43459 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 2018. Compared 258282 event pairs, 24363 based on Foata normal form. 0/16595 useless extension candidates. Maximal degree in co-relation 87619. Up to 43459 conditions per place. [2022-12-13 13:06:39,793 INFO L137 encePairwiseOnDemand]: 723/726 looper letters, 89 selfloop transitions, 1 changer transitions 0/90 dead transitions. [2022-12-13 13:06:39,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 90 transitions, 506 flow [2022-12-13 13:06:39,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:06:39,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:06:39,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1024 transitions. [2022-12-13 13:06:39,797 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4701561065197429 [2022-12-13 13:06:39,797 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1024 transitions. [2022-12-13 13:06:39,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1024 transitions. [2022-12-13 13:06:39,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:06:39,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1024 transitions. [2022-12-13 13:06:39,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 341.3333333333333) internal successors, (1024), 3 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:39,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 726.0) internal successors, (2904), 4 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:39,805 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 726.0) internal successors, (2904), 4 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:39,805 INFO L175 Difference]: Start difference. First operand has 77 places, 92 transitions, 330 flow. Second operand 3 states and 1024 transitions. [2022-12-13 13:06:39,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 90 transitions, 506 flow [2022-12-13 13:06:39,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 90 transitions, 505 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:06:39,808 INFO L231 Difference]: Finished difference. Result has 76 places, 90 transitions, 327 flow [2022-12-13 13:06:39,808 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=726, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=327, PETRI_PLACES=76, PETRI_TRANSITIONS=90} [2022-12-13 13:06:39,809 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, -5 predicate places. [2022-12-13 13:06:39,809 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 90 transitions, 327 flow [2022-12-13 13:06:39,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 319.5) internal successors, (1278), 4 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:39,810 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:06:39,810 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 13:06:39,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-13 13:06:40,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:06:40,012 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 13:06:40,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:06:40,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1072911586, now seen corresponding path program 1 times [2022-12-13 13:06:40,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:06:40,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [962784447] [2022-12-13 13:06:40,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:06:40,015 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 [2022-12-13 13:06:40,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:06:40,017 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:06:40,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:06:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:06:40,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 13:06:40,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:06:40,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:06:40,184 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-12-13 13:06:40,185 INFO L350 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 4 case distinctions, treesize of input 29 treesize of output 48 [2022-12-13 13:06:40,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:06:40,353 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-12-13 13:06:40,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2022-12-13 13:06:40,476 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-12-13 13:06:40,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-12-13 13:06:40,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:06:40,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:06:40,615 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:06:40,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [962784447] [2022-12-13 13:06:40,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [962784447] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:06:40,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:06:40,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:06:40,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609310999] [2022-12-13 13:06:40,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:06:40,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:06:40,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:06:40,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:06:40,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:06:41,302 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 726 [2022-12-13 13:06:41,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 90 transitions, 327 flow. Second operand has 4 states, 4 states have (on average 317.5) internal successors, (1270), 4 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:41,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:06:41,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 726 [2022-12-13 13:06:41,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:06:44,942 INFO L130 PetriNetUnfolder]: 31036/42403 cut-off events. [2022-12-13 13:06:44,942 INFO L131 PetriNetUnfolder]: For 207/207 co-relation queries the response was YES. [2022-12-13 13:06:45,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85523 conditions, 42403 events. 31036/42403 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 1971. Compared 250423 event pairs, 23799 based on Foata normal form. 0/16391 useless extension candidates. Maximal degree in co-relation 85507. Up to 42403 conditions per place. [2022-12-13 13:06:45,197 INFO L137 encePairwiseOnDemand]: 723/726 looper letters, 87 selfloop transitions, 1 changer transitions 0/88 dead transitions. [2022-12-13 13:06:45,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 88 transitions, 499 flow [2022-12-13 13:06:45,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:06:45,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:06:45,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1016 transitions. [2022-12-13 13:06:45,200 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46648301193755737 [2022-12-13 13:06:45,200 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1016 transitions. [2022-12-13 13:06:45,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1016 transitions. [2022-12-13 13:06:45,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:06:45,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1016 transitions. [2022-12-13 13:06:45,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 338.6666666666667) internal successors, (1016), 3 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:45,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 726.0) internal successors, (2904), 4 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:45,204 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 726.0) internal successors, (2904), 4 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:45,205 INFO L175 Difference]: Start difference. First operand has 76 places, 90 transitions, 327 flow. Second operand 3 states and 1016 transitions. [2022-12-13 13:06:45,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 88 transitions, 499 flow [2022-12-13 13:06:45,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 88 transitions, 498 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:06:45,206 INFO L231 Difference]: Finished difference. Result has 75 places, 88 transitions, 324 flow [2022-12-13 13:06:45,207 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=726, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=75, PETRI_TRANSITIONS=88} [2022-12-13 13:06:45,207 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, -6 predicate places. [2022-12-13 13:06:45,207 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 88 transitions, 324 flow [2022-12-13 13:06:45,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 317.5) internal successors, (1270), 4 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:45,208 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:06:45,208 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 13:06:45,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-13 13:06:45,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:06:45,409 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 13:06:45,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:06:45,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1021480130, now seen corresponding path program 2 times [2022-12-13 13:06:45,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:06:45,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [299267298] [2022-12-13 13:06:45,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:06:45,412 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 [2022-12-13 13:06:45,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:06:45,415 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:06:45,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:06:45,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:06:45,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:06:45,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 13:06:45,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:06:45,663 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 13:06:45,663 INFO L350 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 13:06:45,760 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:06:45,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:06:46,390 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:06:46,390 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:06:46,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [299267298] [2022-12-13 13:06:46,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [299267298] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:06:46,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:06:46,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 13:06:46,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794099735] [2022-12-13 13:06:46,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:06:46,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 13:06:46,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:06:46,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 13:06:46,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 13:06:55,956 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 726 [2022-12-13 13:06:55,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 88 transitions, 324 flow. Second operand has 12 states, 12 states have (on average 300.0) internal successors, (3600), 12 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:55,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:06:55,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 726 [2022-12-13 13:06:55,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:06:59,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:07:00,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:07:02,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:07:04,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:07:07,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:07:09,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:07:11,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:07:13,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:07:24,676 INFO L130 PetriNetUnfolder]: 72408/98919 cut-off events. [2022-12-13 13:07:24,676 INFO L131 PetriNetUnfolder]: For 503/503 co-relation queries the response was YES. [2022-12-13 13:07:24,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199448 conditions, 98919 events. 72408/98919 cut-off events. For 503/503 co-relation queries the response was YES. Maximal size of possible extension queue 3562. Compared 632881 event pairs, 55531 based on Foata normal form. 12/38230 useless extension candidates. Maximal degree in co-relation 199431. Up to 14144 conditions per place. [2022-12-13 13:07:25,120 INFO L137 encePairwiseOnDemand]: 716/726 looper letters, 407 selfloop transitions, 43 changer transitions 0/450 dead transitions. [2022-12-13 13:07:25,121 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 450 transitions, 2088 flow [2022-12-13 13:07:25,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 13:07:25,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 13:07:25,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 4050 transitions. [2022-12-13 13:07:25,128 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46487603305785125 [2022-12-13 13:07:25,128 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 4050 transitions. [2022-12-13 13:07:25,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 4050 transitions. [2022-12-13 13:07:25,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:07:25,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 4050 transitions. [2022-12-13 13:07:25,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 337.5) internal successors, (4050), 12 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:25,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 726.0) internal successors, (9438), 13 states have internal predecessors, (9438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:25,144 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 726.0) internal successors, (9438), 13 states have internal predecessors, (9438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:25,144 INFO L175 Difference]: Start difference. First operand has 75 places, 88 transitions, 324 flow. Second operand 12 states and 4050 transitions. [2022-12-13 13:07:25,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 450 transitions, 2088 flow [2022-12-13 13:07:25,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 450 transitions, 2087 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:07:25,152 INFO L231 Difference]: Finished difference. Result has 92 places, 110 transitions, 614 flow [2022-12-13 13:07:25,152 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=726, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=614, PETRI_PLACES=92, PETRI_TRANSITIONS=110} [2022-12-13 13:07:25,153 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 11 predicate places. [2022-12-13 13:07:25,153 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 110 transitions, 614 flow [2022-12-13 13:07:25,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 300.0) internal successors, (3600), 12 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:25,155 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:07:25,155 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:07:25,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-12-13 13:07:25,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:07:25,357 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 13:07:25,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:07:25,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1099481366, now seen corresponding path program 1 times [2022-12-13 13:07:25,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:07:25,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [474104699] [2022-12-13 13:07:25,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:07:25,360 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 [2022-12-13 13:07:25,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:07:25,362 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:07:25,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:07:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:07:25,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 13:07:25,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:07:25,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:07:25,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:07:25,565 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:07:25,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [474104699] [2022-12-13 13:07:25,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [474104699] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:07:25,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:07:25,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:07:25,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322305011] [2022-12-13 13:07:25,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:07:25,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:07:25,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:07:25,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:07:25,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:07:25,741 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 726 [2022-12-13 13:07:25,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 110 transitions, 614 flow. Second operand has 5 states, 5 states have (on average 310.4) internal successors, (1552), 5 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:25,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:07:25,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 726 [2022-12-13 13:07:25,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:07:37,937 INFO L130 PetriNetUnfolder]: 96070/132882 cut-off events. [2022-12-13 13:07:37,937 INFO L131 PetriNetUnfolder]: For 1003/1003 co-relation queries the response was YES. [2022-12-13 13:07:38,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268008 conditions, 132882 events. 96070/132882 cut-off events. For 1003/1003 co-relation queries the response was YES. Maximal size of possible extension queue 4496. Compared 904060 event pairs, 64190 based on Foata normal form. 0/54339 useless extension candidates. Maximal degree in co-relation 267983. Up to 98918 conditions per place. [2022-12-13 13:07:38,672 INFO L137 encePairwiseOnDemand]: 717/726 looper letters, 218 selfloop transitions, 4 changer transitions 0/222 dead transitions. [2022-12-13 13:07:38,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 222 transitions, 1501 flow [2022-12-13 13:07:38,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:07:38,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 13:07:38,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1706 transitions. [2022-12-13 13:07:38,676 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4699724517906336 [2022-12-13 13:07:38,676 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1706 transitions. [2022-12-13 13:07:38,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1706 transitions. [2022-12-13 13:07:38,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:07:38,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1706 transitions. [2022-12-13 13:07:38,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 341.2) internal successors, (1706), 5 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:38,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 726.0) internal successors, (4356), 6 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:38,682 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 726.0) internal successors, (4356), 6 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:38,682 INFO L175 Difference]: Start difference. First operand has 92 places, 110 transitions, 614 flow. Second operand 5 states and 1706 transitions. [2022-12-13 13:07:38,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 222 transitions, 1501 flow [2022-12-13 13:07:38,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 222 transitions, 1368 flow, removed 29 selfloop flow, removed 4 redundant places. [2022-12-13 13:07:38,687 INFO L231 Difference]: Finished difference. Result has 94 places, 111 transitions, 549 flow [2022-12-13 13:07:38,687 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=726, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=549, PETRI_PLACES=94, PETRI_TRANSITIONS=111} [2022-12-13 13:07:38,688 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 13 predicate places. [2022-12-13 13:07:38,688 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 111 transitions, 549 flow [2022-12-13 13:07:38,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 310.4) internal successors, (1552), 5 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:38,688 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:07:38,688 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:07:38,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-13 13:07:38,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:07:38,890 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 13:07:38,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:07:38,891 INFO L85 PathProgramCache]: Analyzing trace with hash 275912122, now seen corresponding path program 1 times [2022-12-13 13:07:38,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:07:38,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1448141709] [2022-12-13 13:07:38,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:07:38,893 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 [2022-12-13 13:07:38,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:07:38,896 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:07:38,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 13:07:39,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:07:39,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 13:07:39,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:07:39,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:07:39,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:07:39,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:07:39,110 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 13:07:39,110 INFO L350 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 2 case distinctions, treesize of input 15 treesize of output 32 [2022-12-13 13:07:39,118 INFO L350 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 18 treesize of output 16 [2022-12-13 13:07:39,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:07:39,142 INFO L350 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 12 treesize of output 14 [2022-12-13 13:07:39,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:07:39,168 INFO L350 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 12 treesize of output 14 [2022-12-13 13:07:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:07:39,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:07:39,231 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:07:39,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1448141709] [2022-12-13 13:07:39,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1448141709] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:07:39,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:07:39,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:07:39,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974765458] [2022-12-13 13:07:39,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:07:39,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:07:39,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:07:39,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:07:39,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:07:39,629 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 726 [2022-12-13 13:07:39,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 111 transitions, 549 flow. Second operand has 5 states, 5 states have (on average 317.6) internal successors, (1588), 5 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:39,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:07:39,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 726 [2022-12-13 13:07:39,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:07:51,418 INFO L130 PetriNetUnfolder]: 92024/126925 cut-off events. [2022-12-13 13:07:51,418 INFO L131 PetriNetUnfolder]: For 9855/9855 co-relation queries the response was YES. [2022-12-13 13:07:51,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269461 conditions, 126925 events. 92024/126925 cut-off events. For 9855/9855 co-relation queries the response was YES. Maximal size of possible extension queue 4553. Compared 850017 event pairs, 71288 based on Foata normal form. 0/58024 useless extension candidates. Maximal degree in co-relation 269433. Up to 126925 conditions per place. [2022-12-13 13:07:52,165 INFO L137 encePairwiseOnDemand]: 723/726 looper letters, 108 selfloop transitions, 1 changer transitions 0/109 dead transitions. [2022-12-13 13:07:52,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 109 transitions, 763 flow [2022-12-13 13:07:52,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:07:52,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:07:52,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1014 transitions. [2022-12-13 13:07:52,168 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.465564738292011 [2022-12-13 13:07:52,168 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1014 transitions. [2022-12-13 13:07:52,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1014 transitions. [2022-12-13 13:07:52,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:07:52,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1014 transitions. [2022-12-13 13:07:52,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 338.0) internal successors, (1014), 3 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:52,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 726.0) internal successors, (2904), 4 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:52,171 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 726.0) internal successors, (2904), 4 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:52,171 INFO L175 Difference]: Start difference. First operand has 94 places, 111 transitions, 549 flow. Second operand 3 states and 1014 transitions. [2022-12-13 13:07:52,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 109 transitions, 763 flow [2022-12-13 13:07:52,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 109 transitions, 757 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 13:07:52,214 INFO L231 Difference]: Finished difference. Result has 93 places, 109 transitions, 541 flow [2022-12-13 13:07:52,214 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=726, PETRI_DIFFERENCE_MINUEND_FLOW=539, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=541, PETRI_PLACES=93, PETRI_TRANSITIONS=109} [2022-12-13 13:07:52,214 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 12 predicate places. [2022-12-13 13:07:52,214 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 109 transitions, 541 flow [2022-12-13 13:07:52,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 317.6) internal successors, (1588), 5 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:52,215 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:07:52,215 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:07:52,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-13 13:07:52,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:07:52,416 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 13:07:52,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:07:52,417 INFO L85 PathProgramCache]: Analyzing trace with hash -310480045, now seen corresponding path program 1 times [2022-12-13 13:07:52,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:07:52,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1813847359] [2022-12-13 13:07:52,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:07:52,419 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 [2022-12-13 13:07:52,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:07:52,422 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:07:52,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-13 13:07:52,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:07:52,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 13:07:52,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:07:52,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:07:52,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:07:52,558 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:07:52,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1813847359] [2022-12-13 13:07:52,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1813847359] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:07:52,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:07:52,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:07:52,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103727867] [2022-12-13 13:07:52,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:07:52,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:07:52,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:07:52,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:07:52,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:07:52,832 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 726 [2022-12-13 13:07:52,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 109 transitions, 541 flow. Second operand has 5 states, 5 states have (on average 310.6) internal successors, (1553), 5 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:52,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:07:52,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 726 [2022-12-13 13:07:52,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:08:10,876 INFO L130 PetriNetUnfolder]: 137624/192129 cut-off events. [2022-12-13 13:08:10,876 INFO L131 PetriNetUnfolder]: For 17503/17503 co-relation queries the response was YES. [2022-12-13 13:08:11,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405847 conditions, 192129 events. 137624/192129 cut-off events. For 17503/17503 co-relation queries the response was YES. Maximal size of possible extension queue 6652. Compared 1401449 event pairs, 87962 based on Foata normal form. 1680/94528 useless extension candidates. Maximal degree in co-relation 405818. Up to 126913 conditions per place. [2022-12-13 13:08:12,193 INFO L137 encePairwiseOnDemand]: 717/726 looper letters, 186 selfloop transitions, 15 changer transitions 0/201 dead transitions. [2022-12-13 13:08:12,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 201 transitions, 1217 flow [2022-12-13 13:08:12,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:08:12,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 13:08:12,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1697 transitions. [2022-12-13 13:08:12,197 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4674931129476584 [2022-12-13 13:08:12,197 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1697 transitions. [2022-12-13 13:08:12,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1697 transitions. [2022-12-13 13:08:12,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:08:12,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1697 transitions. [2022-12-13 13:08:12,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 339.4) internal successors, (1697), 5 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:08:12,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 726.0) internal successors, (4356), 6 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:08:12,202 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 726.0) internal successors, (4356), 6 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:08:12,202 INFO L175 Difference]: Start difference. First operand has 93 places, 109 transitions, 541 flow. Second operand 5 states and 1697 transitions. [2022-12-13 13:08:12,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 201 transitions, 1217 flow [2022-12-13 13:08:12,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 201 transitions, 1216 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:08:12,303 INFO L231 Difference]: Finished difference. Result has 98 places, 111 transitions, 599 flow [2022-12-13 13:08:12,303 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=726, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=599, PETRI_PLACES=98, PETRI_TRANSITIONS=111} [2022-12-13 13:08:12,303 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 17 predicate places. [2022-12-13 13:08:12,303 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 111 transitions, 599 flow [2022-12-13 13:08:12,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 310.6) internal successors, (1553), 5 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:08:12,304 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:08:12,304 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:08:12,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-13 13:08:12,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:12,505 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 13:08:12,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:08:12,506 INFO L85 PathProgramCache]: Analyzing trace with hash 275912123, now seen corresponding path program 1 times [2022-12-13 13:08:12,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:08:12,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668179012] [2022-12-13 13:08:12,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:08:12,508 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 [2022-12-13 13:08:12,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:08:12,511 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:08:12,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-13 13:08:12,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:12,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 13:08:12,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:08:12,662 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-13 13:08:12,662 INFO L350 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-12-13 13:08:12,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:08:12,690 INFO L350 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 20 [2022-12-13 13:08:12,718 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 13:08:12,718 INFO L350 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 [2022-12-13 13:08:12,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:08:12,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:08:12,759 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:08:12,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668179012] [2022-12-13 13:08:12,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668179012] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:08:12,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:08:12,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:08:12,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93438422] [2022-12-13 13:08:12,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:08:12,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:08:12,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:08:12,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:08:12,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:08:13,075 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 726 [2022-12-13 13:08:13,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 111 transitions, 599 flow. Second operand has 4 states, 4 states have (on average 316.0) internal successors, (1264), 4 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:08:13,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:08:13,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 726 [2022-12-13 13:08:13,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:08:30,593 INFO L130 PetriNetUnfolder]: 131870/183484 cut-off events. [2022-12-13 13:08:30,593 INFO L131 PetriNetUnfolder]: For 47474/47474 co-relation queries the response was YES. [2022-12-13 13:08:31,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404898 conditions, 183484 events. 131870/183484 cut-off events. For 47474/47474 co-relation queries the response was YES. Maximal size of possible extension queue 6435. Compared 1308535 event pairs, 103166 based on Foata normal form. 0/90272 useless extension candidates. Maximal degree in co-relation 404867. Up to 183484 conditions per place. [2022-12-13 13:08:31,696 INFO L137 encePairwiseOnDemand]: 723/726 looper letters, 108 selfloop transitions, 1 changer transitions 0/109 dead transitions. [2022-12-13 13:08:31,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 109 transitions, 813 flow [2022-12-13 13:08:31,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:08:31,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:08:31,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1006 transitions. [2022-12-13 13:08:31,699 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46189164370982555 [2022-12-13 13:08:31,699 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1006 transitions. [2022-12-13 13:08:31,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1006 transitions. [2022-12-13 13:08:31,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:08:31,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1006 transitions. [2022-12-13 13:08:31,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 335.3333333333333) internal successors, (1006), 3 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:08:31,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 726.0) internal successors, (2904), 4 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:08:31,705 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 726.0) internal successors, (2904), 4 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:08:31,705 INFO L175 Difference]: Start difference. First operand has 98 places, 111 transitions, 599 flow. Second operand 3 states and 1006 transitions. [2022-12-13 13:08:31,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 109 transitions, 813 flow [2022-12-13 13:08:31,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 109 transitions, 797 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 13:08:31,938 INFO L231 Difference]: Finished difference. Result has 97 places, 109 transitions, 581 flow [2022-12-13 13:08:31,938 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=726, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=581, PETRI_PLACES=97, PETRI_TRANSITIONS=109} [2022-12-13 13:08:31,938 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 16 predicate places. [2022-12-13 13:08:31,939 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 109 transitions, 581 flow [2022-12-13 13:08:31,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 316.0) internal successors, (1264), 4 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:08:31,939 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:08:31,939 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:08:31,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-12-13 13:08:32,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:32,141 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 13:08:32,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:08:32,142 INFO L85 PathProgramCache]: Analyzing trace with hash -36659797, now seen corresponding path program 1 times [2022-12-13 13:08:32,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:08:32,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282919541] [2022-12-13 13:08:32,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:08:32,143 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 [2022-12-13 13:08:32,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:08:32,146 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:08:32,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-13 13:08:32,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:32,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 13:08:32,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:08:32,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:08:32,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:08:32,341 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:08:32,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282919541] [2022-12-13 13:08:32,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282919541] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:08:32,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:08:32,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:08:32,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659478057] [2022-12-13 13:08:32,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:08:32,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:08:32,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:08:32,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:08:32,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:08:32,554 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 726 [2022-12-13 13:08:32,555 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 109 transitions, 581 flow. Second operand has 5 states, 5 states have (on average 310.8) internal successors, (1554), 5 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:08:32,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:08:32,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 726 [2022-12-13 13:08:32,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:08:46,133 INFO L130 PetriNetUnfolder]: 99334/138516 cut-off events. [2022-12-13 13:08:46,133 INFO L131 PetriNetUnfolder]: For 28406/28406 co-relation queries the response was YES. [2022-12-13 13:08:46,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306557 conditions, 138516 events. 99334/138516 cut-off events. For 28406/28406 co-relation queries the response was YES. Maximal size of possible extension queue 4862. Compared 960502 event pairs, 72254 based on Foata normal form. 0/67928 useless extension candidates. Maximal degree in co-relation 306525. Up to 120950 conditions per place. [2022-12-13 13:08:46,919 INFO L137 encePairwiseOnDemand]: 717/726 looper letters, 181 selfloop transitions, 4 changer transitions 0/185 dead transitions. [2022-12-13 13:08:46,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 185 transitions, 1292 flow [2022-12-13 13:08:46,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:08:46,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 13:08:46,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1666 transitions. [2022-12-13 13:08:46,923 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45895316804407715 [2022-12-13 13:08:46,923 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1666 transitions. [2022-12-13 13:08:46,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1666 transitions. [2022-12-13 13:08:46,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:08:46,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1666 transitions. [2022-12-13 13:08:46,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 333.2) internal successors, (1666), 5 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:08:46,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 726.0) internal successors, (4356), 6 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:08:46,930 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 726.0) internal successors, (4356), 6 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:08:46,930 INFO L175 Difference]: Start difference. First operand has 97 places, 109 transitions, 581 flow. Second operand 5 states and 1666 transitions. [2022-12-13 13:08:46,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 185 transitions, 1292 flow [2022-12-13 13:08:47,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 185 transitions, 1291 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:08:47,109 INFO L231 Difference]: Finished difference. Result has 102 places, 110 transitions, 605 flow [2022-12-13 13:08:47,109 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=726, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=605, PETRI_PLACES=102, PETRI_TRANSITIONS=110} [2022-12-13 13:08:47,109 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 21 predicate places. [2022-12-13 13:08:47,109 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 110 transitions, 605 flow [2022-12-13 13:08:47,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 310.8) internal successors, (1554), 5 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:08:47,110 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:08:47,110 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:08:47,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-12-13 13:08:47,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:08:47,311 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 13:08:47,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:08:47,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1722421306, now seen corresponding path program 1 times [2022-12-13 13:08:47,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:08:47,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1679073219] [2022-12-13 13:08:47,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:08:47,314 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 [2022-12-13 13:08:47,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:08:47,317 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:08:47,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-13 13:08:47,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:47,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 13:08:47,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:08:47,594 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 13:08:47,594 INFO L350 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 13:08:47,686 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 13:08:47,686 INFO L350 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 13:08:47,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:08:47,763 INFO L350 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 16 [2022-12-13 13:08:47,784 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 13:08:47,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 13:08:47,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:08:47,823 INFO L350 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 16 [2022-12-13 13:08:47,836 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 13:08:47,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 13:08:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:08:47,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:08:52,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:08:52,592 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:08:52,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1679073219] [2022-12-13 13:08:52,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1679073219] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:08:52,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:08:52,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 13:08:52,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109457732] [2022-12-13 13:08:52,592 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:08:52,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 13:08:52,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:08:52,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 13:08:52,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-12-13 13:08:55,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:08:57,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:08:59,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:09:01,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:09:04,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:09:08,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:09:11,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:09:13,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:09:15,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:09:18,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:09:23,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:09:25,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:09:28,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:09:30,532 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 726 [2022-12-13 13:09:30,534 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 110 transitions, 605 flow. Second operand has 12 states, 12 states have (on average 250.5) internal successors, (3006), 12 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:09:30,534 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:09:30,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 726 [2022-12-13 13:09:30,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:09:36,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:09:48,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:11:05,605 INFO L130 PetriNetUnfolder]: 286576/395952 cut-off events. [2022-12-13 13:11:05,606 INFO L131 PetriNetUnfolder]: For 84027/84027 co-relation queries the response was YES. [2022-12-13 13:11:07,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 922104 conditions, 395952 events. 286576/395952 cut-off events. For 84027/84027 co-relation queries the response was YES. Maximal size of possible extension queue 12144. Compared 3050461 event pairs, 85386 based on Foata normal form. 0/213644 useless extension candidates. Maximal degree in co-relation 922069. Up to 38612 conditions per place. [2022-12-13 13:11:08,427 INFO L137 encePairwiseOnDemand]: 705/726 looper letters, 1174 selfloop transitions, 142 changer transitions 0/1316 dead transitions. [2022-12-13 13:11:08,427 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 1316 transitions, 6881 flow [2022-12-13 13:11:08,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 13:11:08,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-13 13:11:08,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 10053 transitions. [2022-12-13 13:11:08,444 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39563164108618654 [2022-12-13 13:11:08,444 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 10053 transitions. [2022-12-13 13:11:08,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 10053 transitions. [2022-12-13 13:11:08,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:11:08,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 10053 transitions. [2022-12-13 13:11:08,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 287.22857142857146) internal successors, (10053), 35 states have internal predecessors, (10053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:11:08,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 726.0) internal successors, (26136), 36 states have internal predecessors, (26136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:11:08,476 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 726.0) internal successors, (26136), 36 states have internal predecessors, (26136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:11:08,476 INFO L175 Difference]: Start difference. First operand has 102 places, 110 transitions, 605 flow. Second operand 35 states and 10053 transitions. [2022-12-13 13:11:08,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 1316 transitions, 6881 flow [2022-12-13 13:11:09,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 1316 transitions, 6876 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:11:09,433 INFO L231 Difference]: Finished difference. Result has 154 places, 242 transitions, 2085 flow [2022-12-13 13:11:09,433 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=726, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2085, PETRI_PLACES=154, PETRI_TRANSITIONS=242} [2022-12-13 13:11:09,434 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 73 predicate places. [2022-12-13 13:11:09,434 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 242 transitions, 2085 flow [2022-12-13 13:11:09,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 250.5) internal successors, (3006), 12 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:11:09,434 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:11:09,434 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:11:09,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-12-13 13:11:09,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:11:09,636 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 13:11:09,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:11:09,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1722421518, now seen corresponding path program 1 times [2022-12-13 13:11:09,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:11:09,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [483200179] [2022-12-13 13:11:09,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:11:09,639 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 [2022-12-13 13:11:09,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:11:09,642 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 13:11:09,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b57f4bd-ac4c-4d4a-8a9f-8a4dafefb175/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-13 13:11:09,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:11:09,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 13:11:09,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:11:09,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 13:11:09,941 INFO L350 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 [2022-12-13 13:11:09,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:11:09,995 INFO L350 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 16 [2022-12-13 13:11:10,005 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 13:11:10,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 13:11:10,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:11:10,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:11:10,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:11:10,547 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:11:10,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [483200179] [2022-12-13 13:11:10,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [483200179] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:11:10,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:11:10,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-12-13 13:11:10,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134244408] [2022-12-13 13:11:10,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:11:10,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 13:11:10,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:11:10,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 13:11:10,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-12-13 13:11:16,560 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 726 [2022-12-13 13:11:16,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 242 transitions, 2085 flow. Second operand has 10 states, 10 states have (on average 283.6) internal successors, (2836), 10 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:11:16,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:11:16,562 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 726 [2022-12-13 13:11:16,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:14:11,831 INFO L130 PetriNetUnfolder]: 798760/1098986 cut-off events. [2022-12-13 13:14:11,831 INFO L131 PetriNetUnfolder]: For 5672261/5672261 co-relation queries the response was YES. [2022-12-13 13:14:18,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3376724 conditions, 1098986 events. 798760/1098986 cut-off events. For 5672261/5672261 co-relation queries the response was YES. Maximal size of possible extension queue 31523. Compared 9145037 event pairs, 306180 based on Foata normal form. 0/656404 useless extension candidates. Maximal degree in co-relation 3376668. Up to 121580 conditions per place. [2022-12-13 13:14:21,719 INFO L137 encePairwiseOnDemand]: 710/726 looper letters, 1434 selfloop transitions, 203 changer transitions 0/1637 dead transitions. [2022-12-13 13:14:21,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 1637 transitions, 14111 flow [2022-12-13 13:14:21,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 13:14:21,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-13 13:14:21,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 11186 transitions. [2022-12-13 13:14:21,731 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4402203856749311 [2022-12-13 13:14:21,731 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 11186 transitions. [2022-12-13 13:14:21,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 11186 transitions. [2022-12-13 13:14:21,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:14:21,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 11186 transitions. [2022-12-13 13:14:21,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 319.6) internal successors, (11186), 35 states have internal predecessors, (11186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:21,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 726.0) internal successors, (26136), 36 states have internal predecessors, (26136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:21,762 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 726.0) internal successors, (26136), 36 states have internal predecessors, (26136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:14:21,763 INFO L175 Difference]: Start difference. First operand has 154 places, 242 transitions, 2085 flow. Second operand 35 states and 11186 transitions. [2022-12-13 13:14:21,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 1637 transitions, 14111 flow