./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-commit-1.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_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 4b2db95108d1ec3739bf941ab9d238fd5c3dd7467faa747c6c0552ae2048ee95 --- 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 19:49:51,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 19:49:51,024 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 19:49:51,043 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 19:49:51,044 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 19:49:51,045 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 19:49:51,046 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 19:49:51,047 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 19:49:51,049 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 19:49:51,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 19:49:51,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 19:49:51,052 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 19:49:51,053 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 19:49:51,054 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 19:49:51,055 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 19:49:51,056 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 19:49:51,057 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 19:49:51,058 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 19:49:51,060 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 19:49:51,062 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 19:49:51,063 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 19:49:51,064 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 19:49:51,066 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 19:49:51,066 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 19:49:51,070 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 19:49:51,070 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 19:49:51,071 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 19:49:51,072 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 19:49:51,072 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 19:49:51,073 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 19:49:51,073 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 19:49:51,074 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 19:49:51,075 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 19:49:51,076 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 19:49:51,077 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 19:49:51,077 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 19:49:51,077 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 19:49:51,078 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 19:49:51,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 19:49:51,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 19:49:51,079 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 19:49:51,080 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 19:49:51,101 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 19:49:51,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 19:49:51,101 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 19:49:51,101 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 19:49:51,102 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 19:49:51,102 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 19:49:51,103 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 19:49:51,103 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 19:49:51,103 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 19:49:51,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 19:49:51,104 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 19:49:51,104 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 19:49:51,104 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 19:49:51,104 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 19:49:51,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 19:49:51,105 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 19:49:51,105 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 19:49:51,105 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 19:49:51,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 19:49:51,105 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 19:49:51,105 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 19:49:51,106 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 19:49:51,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 19:49:51,106 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 19:49:51,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 19:49:51,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:49:51,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 19:49:51,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 19:49:51,107 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 19:49:51,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 19:49:51,107 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 19:49:51,108 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 19:49:51,108 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 19:49:51,108 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 19:49:51,108 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_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b2db95108d1ec3739bf941ab9d238fd5c3dd7467faa747c6c0552ae2048ee95 [2022-12-13 19:49:51,286 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 19:49:51,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 19:49:51,309 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 19:49:51,310 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 19:49:51,310 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 19:49:51,312 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2022-12-13 19:49:53,933 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 19:49:54,064 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 19:49:54,064 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2022-12-13 19:49:54,069 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/data/c4a75367c/c9b33b4e90b84ec19885ba5a5697131e/FLAGd2e8910d8 [2022-12-13 19:49:54,083 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/data/c4a75367c/c9b33b4e90b84ec19885ba5a5697131e [2022-12-13 19:49:54,085 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 19:49:54,087 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 19:49:54,088 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 19:49:54,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 19:49:54,091 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 19:49:54,092 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:49:54" (1/1) ... [2022-12-13 19:49:54,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fc39f39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:49:54, skipping insertion in model container [2022-12-13 19:49:54,093 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:49:54" (1/1) ... [2022-12-13 19:49:54,101 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 19:49:54,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:49:54,236 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:49:54,238 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:49:54,239 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:49:54,240 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:49:54,240 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:49:54,241 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:49:54,241 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:49:54,242 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:49:54,245 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:49:54,246 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:49:54,246 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:49:54,247 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:49:54,248 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:49:54,249 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:49:54,249 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:49:54,250 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:49:54,256 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_894b2db0-6b62-45de-b16a-07c1d8ef27e3/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c[4604,4617] [2022-12-13 19:49:54,263 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:49:54,272 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 19:49:54,273 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@739a0dd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:49:54, skipping insertion in model container [2022-12-13 19:49:54,273 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 19:49:54,273 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 19:49:54,275 INFO L158 Benchmark]: Toolchain (without parser) took 187.62ms. Allocated memory is still 134.2MB. Free memory was 91.9MB in the beginning and 80.9MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-13 19:49:54,275 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 134.2MB. Free memory was 77.0MB in the beginning and 76.9MB in the end (delta: 140.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 19:49:54,276 INFO L158 Benchmark]: CACSL2BoogieTranslator took 185.38ms. Allocated memory is still 134.2MB. Free memory was 91.9MB in the beginning and 80.9MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-13 19:49:54,277 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 134.2MB. Free memory was 77.0MB in the beginning and 76.9MB in the end (delta: 140.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 185.38ms. Allocated memory is still 134.2MB. Free memory was 91.9MB in the beginning and 80.9MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 157]: 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_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 4b2db95108d1ec3739bf941ab9d238fd5c3dd7467faa747c6c0552ae2048ee95 --- 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 19:49:55,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 19:49:55,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 19:49:55,715 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 19:49:55,716 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 19:49:55,717 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 19:49:55,719 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 19:49:55,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 19:49:55,721 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 19:49:55,722 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 19:49:55,723 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 19:49:55,723 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 19:49:55,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 19:49:55,725 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 19:49:55,726 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 19:49:55,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 19:49:55,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 19:49:55,730 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 19:49:55,732 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 19:49:55,733 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 19:49:55,734 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 19:49:55,735 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 19:49:55,735 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 19:49:55,736 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 19:49:55,738 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 19:49:55,739 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 19:49:55,739 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 19:49:55,740 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 19:49:55,740 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 19:49:55,741 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 19:49:55,741 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 19:49:55,741 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 19:49:55,742 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 19:49:55,742 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 19:49:55,743 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 19:49:55,743 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 19:49:55,744 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 19:49:55,744 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 19:49:55,744 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 19:49:55,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 19:49:55,746 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 19:49:55,747 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 19:49:55,770 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 19:49:55,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 19:49:55,771 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 19:49:55,771 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 19:49:55,772 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 19:49:55,772 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 19:49:55,773 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 19:49:55,773 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 19:49:55,773 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 19:49:55,773 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 19:49:55,774 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 19:49:55,774 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 19:49:55,774 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 19:49:55,774 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 19:49:55,774 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 19:49:55,774 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 19:49:55,775 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 19:49:55,775 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 19:49:55,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 19:49:55,775 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 19:49:55,775 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 19:49:55,775 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 19:49:55,776 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 19:49:55,776 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 19:49:55,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 19:49:55,776 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 19:49:55,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 19:49:55,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:49:55,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 19:49:55,777 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 19:49:55,777 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 19:49:55,777 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 19:49:55,777 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 19:49:55,777 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 19:49:55,778 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 19:49:55,778 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 19:49:55,778 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 19:49:55,778 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_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b2db95108d1ec3739bf941ab9d238fd5c3dd7467faa747c6c0552ae2048ee95 [2022-12-13 19:49:56,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 19:49:56,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 19:49:56,022 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 19:49:56,023 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 19:49:56,023 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 19:49:56,024 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2022-12-13 19:49:58,637 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 19:49:58,813 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 19:49:58,814 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2022-12-13 19:49:58,820 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/data/d95a17149/788882c5c24949c9b4ab816cdf64ced8/FLAGb6168015e [2022-12-13 19:49:58,831 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/data/d95a17149/788882c5c24949c9b4ab816cdf64ced8 [2022-12-13 19:49:58,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 19:49:58,834 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 19:49:58,835 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 19:49:58,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 19:49:58,838 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 19:49:58,839 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:49:58" (1/1) ... [2022-12-13 19:49:58,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e72e483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:49:58, skipping insertion in model container [2022-12-13 19:49:58,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:49:58" (1/1) ... [2022-12-13 19:49:58,847 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 19:49:58,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:49:58,987 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:49:58,990 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:49:58,990 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:49:58,992 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:49:58,992 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:49:58,994 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:49:58,995 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:49:58,996 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:49:58,999 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:49:59,001 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:49:59,002 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:49:59,003 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:49:59,004 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:49:59,006 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:49:59,006 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:49:59,008 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:49:59,016 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_894b2db0-6b62-45de-b16a-07c1d8ef27e3/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c[4604,4617] [2022-12-13 19:49:59,025 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:49:59,035 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 19:49:59,039 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:49:59,042 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:49:59,044 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:49:59,044 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:49:59,045 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:49:59,045 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:49:59,046 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:49:59,046 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:49:59,047 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:49:59,048 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:49:59,049 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:49:59,050 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:49:59,050 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:49:59,051 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:49:59,052 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:49:59,052 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:49:59,053 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:49:59,057 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_894b2db0-6b62-45de-b16a-07c1d8ef27e3/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c[4604,4617] [2022-12-13 19:49:59,059 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:49:59,063 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 19:49:59,074 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:49:59,075 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:49:59,075 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:49:59,076 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:49:59,076 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:49:59,077 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:49:59,077 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:49:59,078 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:49:59,079 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:49:59,080 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:49:59,080 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:49:59,081 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:49:59,081 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:49:59,082 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:49:59,082 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:49:59,083 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:49:59,086 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_894b2db0-6b62-45de-b16a-07c1d8ef27e3/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c[4604,4617] [2022-12-13 19:49:59,089 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:49:59,101 INFO L208 MainTranslator]: Completed translation [2022-12-13 19:49:59,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:49:59 WrapperNode [2022-12-13 19:49:59,101 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 19:49:59,102 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 19:49:59,102 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 19:49:59,102 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 19:49:59,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:49:59" (1/1) ... [2022-12-13 19:49:59,116 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:49:59" (1/1) ... [2022-12-13 19:49:59,137 INFO L138 Inliner]: procedures = 27, calls = 68, calls flagged for inlining = 20, calls inlined = 24, statements flattened = 322 [2022-12-13 19:49:59,137 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 19:49:59,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 19:49:59,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 19:49:59,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 19:49:59,146 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:49:59" (1/1) ... [2022-12-13 19:49:59,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:49:59" (1/1) ... [2022-12-13 19:49:59,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:49:59" (1/1) ... [2022-12-13 19:49:59,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:49:59" (1/1) ... [2022-12-13 19:49:59,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:49:59" (1/1) ... [2022-12-13 19:49:59,167 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:49:59" (1/1) ... [2022-12-13 19:49:59,170 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:49:59" (1/1) ... [2022-12-13 19:49:59,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:49:59" (1/1) ... [2022-12-13 19:49:59,175 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 19:49:59,176 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 19:49:59,176 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 19:49:59,176 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 19:49:59,177 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:49:59" (1/1) ... [2022-12-13 19:49:59,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:49:59,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:49:59,204 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 19:49:59,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 19:49:59,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 19:49:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 19:49:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 19:49:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 19:49:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 19:49:59,237 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 19:49:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 19:49:59,237 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 19:49:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 19:49:59,237 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 19:49:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 19:49:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 19:49:59,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 19:49:59,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 19:49:59,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 19:49:59,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 19:49:59,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 19:49:59,239 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 19:49:59,336 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 19:49:59,338 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 19:49:59,956 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 19:50:00,120 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 19:50:00,120 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-13 19:50:00,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:50:00 BoogieIcfgContainer [2022-12-13 19:50:00,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 19:50:00,124 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 19:50:00,124 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 19:50:00,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 19:50:00,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 07:49:58" (1/3) ... [2022-12-13 19:50:00,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2726f8a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:50:00, skipping insertion in model container [2022-12-13 19:50:00,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:49:59" (2/3) ... [2022-12-13 19:50:00,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2726f8a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:50:00, skipping insertion in model container [2022-12-13 19:50:00,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:50:00" (3/3) ... [2022-12-13 19:50:00,128 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-commit-1.wvr.c [2022-12-13 19:50:00,142 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 19:50:00,142 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 36 error locations. [2022-12-13 19:50:00,142 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 19:50:00,220 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 19:50:00,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 272 places, 281 transitions, 586 flow [2022-12-13 19:50:00,308 INFO L130 PetriNetUnfolder]: 19/278 cut-off events. [2022-12-13 19:50:00,308 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 19:50:00,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291 conditions, 278 events. 19/278 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 270 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 228. Up to 2 conditions per place. [2022-12-13 19:50:00,313 INFO L82 GeneralOperation]: Start removeDead. Operand has 272 places, 281 transitions, 586 flow [2022-12-13 19:50:00,318 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 264 places, 273 transitions, 564 flow [2022-12-13 19:50:00,321 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 19:50:00,328 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 264 places, 273 transitions, 564 flow [2022-12-13 19:50:00,330 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 264 places, 273 transitions, 564 flow [2022-12-13 19:50:00,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 264 places, 273 transitions, 564 flow [2022-12-13 19:50:00,373 INFO L130 PetriNetUnfolder]: 19/273 cut-off events. [2022-12-13 19:50:00,373 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 19:50:00,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286 conditions, 273 events. 19/273 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 271 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 228. Up to 2 conditions per place. [2022-12-13 19:50:00,376 INFO L119 LiptonReduction]: Number of co-enabled transitions 2982 [2022-12-13 19:50:40,194 INFO L134 LiptonReduction]: Checked pairs total: 10744 [2022-12-13 19:50:40,194 INFO L136 LiptonReduction]: Total number of compositions: 292 [2022-12-13 19:50:40,208 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:50:40,212 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;@1dd74ad0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:50:40,212 INFO L358 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2022-12-13 19:50:40,214 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 19:50:40,214 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:50:40,214 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:50:40,214 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 19:50:40,215 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 19:50:40,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:50:40,218 INFO L85 PathProgramCache]: Analyzing trace with hash 44873, now seen corresponding path program 1 times [2022-12-13 19:50:40,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:50:40,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [309158910] [2022-12-13 19:50:40,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:50:40,228 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 19:50:40,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:50:40,229 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:50:40,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:50:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:50:40,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 19:50:40,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:50:40,530 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:50:40,531 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 19:50:40,571 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 19:50:40,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:50:40,571 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:50:40,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [309158910] [2022-12-13 19:50:40,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [309158910] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:50:40,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:50:40,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:50:40,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544894366] [2022-12-13 19:50:40,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:50:40,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:50:40,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:50:40,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:50:40,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:50:40,782 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 573 [2022-12-13 19:50:40,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:50:40,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:50:40,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 573 [2022-12-13 19:50:40,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:50:44,150 INFO L130 PetriNetUnfolder]: 16421/22822 cut-off events. [2022-12-13 19:50:44,150 INFO L131 PetriNetUnfolder]: For 234/234 co-relation queries the response was YES. [2022-12-13 19:50:44,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46183 conditions, 22822 events. 16421/22822 cut-off events. For 234/234 co-relation queries the response was YES. Maximal size of possible extension queue 1356. Compared 131346 event pairs, 14280 based on Foata normal form. 0/7111 useless extension candidates. Maximal degree in co-relation 21710. Up to 11414 conditions per place. [2022-12-13 19:50:44,236 INFO L137 encePairwiseOnDemand]: 563/573 looper letters, 118 selfloop transitions, 6 changer transitions 0/124 dead transitions. [2022-12-13 19:50:44,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 124 transitions, 532 flow [2022-12-13 19:50:44,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:50:44,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:50:44,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 795 transitions. [2022-12-13 19:50:44,249 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.462478184991274 [2022-12-13 19:50:44,250 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 795 transitions. [2022-12-13 19:50:44,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 795 transitions. [2022-12-13 19:50:44,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:50:44,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 795 transitions. [2022-12-13 19:50:44,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 265.0) internal successors, (795), 3 states have internal predecessors, (795), 0 states have call successors, (0), 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 19:50:44,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 573.0) internal successors, (2292), 4 states have internal predecessors, (2292), 0 states have call successors, (0), 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 19:50:44,264 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 573.0) internal successors, (2292), 4 states have internal predecessors, (2292), 0 states have call successors, (0), 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 19:50:44,265 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 148 flow. Second operand 3 states and 795 transitions. [2022-12-13 19:50:44,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 124 transitions, 532 flow [2022-12-13 19:50:44,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 124 transitions, 508 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 19:50:44,279 INFO L231 Difference]: Finished difference. Result has 66 places, 69 transitions, 184 flow [2022-12-13 19:50:44,280 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=66, PETRI_TRANSITIONS=69} [2022-12-13 19:50:44,282 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -3 predicate places. [2022-12-13 19:50:44,283 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 69 transitions, 184 flow [2022-12-13 19:50:44,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:50:44,283 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:50:44,283 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 19:50:44,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:50:44,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:50:44,484 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 19:50:44,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:50:44,485 INFO L85 PathProgramCache]: Analyzing trace with hash 44872, now seen corresponding path program 1 times [2022-12-13 19:50:44,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:50:44,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [858858920] [2022-12-13 19:50:44,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:50:44,487 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 19:50:44,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:50:44,488 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:50:44,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:50:44,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:50:44,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 19:50:44,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:50:44,628 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 19:50:44,629 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 19:50:44,642 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 19:50:44,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:50:44,643 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:50:44,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [858858920] [2022-12-13 19:50:44,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [858858920] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:50:44,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:50:44,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:50:44,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724339885] [2022-12-13 19:50:44,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:50:44,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:50:44,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:50:44,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:50:44,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:50:44,758 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 573 [2022-12-13 19:50:44,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 69 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:50:44,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:50:44,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 573 [2022-12-13 19:50:44,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:50:47,320 INFO L130 PetriNetUnfolder]: 16421/22816 cut-off events. [2022-12-13 19:50:47,320 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-12-13 19:50:47,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45866 conditions, 22816 events. 16421/22816 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 1427. Compared 132199 event pairs, 14280 based on Foata normal form. 4/7121 useless extension candidates. Maximal degree in co-relation 22913. Up to 22816 conditions per place. [2022-12-13 19:50:47,389 INFO L137 encePairwiseOnDemand]: 569/573 looper letters, 65 selfloop transitions, 1 changer transitions 0/66 dead transitions. [2022-12-13 19:50:47,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 66 transitions, 310 flow [2022-12-13 19:50:47,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:50:47,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:50:47,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 730 transitions. [2022-12-13 19:50:47,394 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4246655031995346 [2022-12-13 19:50:47,395 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 730 transitions. [2022-12-13 19:50:47,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 730 transitions. [2022-12-13 19:50:47,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:50:47,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 730 transitions. [2022-12-13 19:50:47,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.33333333333334) internal successors, (730), 3 states have internal predecessors, (730), 0 states have call successors, (0), 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 19:50:47,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 573.0) internal successors, (2292), 4 states have internal predecessors, (2292), 0 states have call successors, (0), 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 19:50:47,399 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 573.0) internal successors, (2292), 4 states have internal predecessors, (2292), 0 states have call successors, (0), 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 19:50:47,399 INFO L175 Difference]: Start difference. First operand has 66 places, 69 transitions, 184 flow. Second operand 3 states and 730 transitions. [2022-12-13 19:50:47,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 66 transitions, 310 flow [2022-12-13 19:50:47,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 66 transitions, 298 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:50:47,401 INFO L231 Difference]: Finished difference. Result has 63 places, 66 transitions, 168 flow [2022-12-13 19:50:47,401 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=63, PETRI_TRANSITIONS=66} [2022-12-13 19:50:47,402 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -6 predicate places. [2022-12-13 19:50:47,402 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 66 transitions, 168 flow [2022-12-13 19:50:47,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:50:47,402 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:50:47,402 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 19:50:47,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:50:47,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:50:47,603 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 19:50:47,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:50:47,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1396411, now seen corresponding path program 1 times [2022-12-13 19:50:47,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:50:47,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489232891] [2022-12-13 19:50:47,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:50:47,605 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 19:50:47,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:50:47,606 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:50:47,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:50:47,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:50:47,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 19:50:47,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:50:47,774 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:50:47,774 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 19:50:47,830 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 19:50:47,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:50:48,007 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 19:50:48,007 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:50:48,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489232891] [2022-12-13 19:50:48,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489232891] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:50:48,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:50:48,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 19:50:48,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029154743] [2022-12-13 19:50:48,008 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:50:48,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 19:50:48,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:50:48,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 19:50:48,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:50:49,053 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 573 [2022-12-13 19:50:49,054 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 66 transitions, 168 flow. Second operand has 6 states, 6 states have (on average 208.0) internal successors, (1248), 6 states have internal predecessors, (1248), 0 states have call successors, (0), 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 19:50:49,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:50:49,054 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 573 [2022-12-13 19:50:49,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:50:54,387 INFO L130 PetriNetUnfolder]: 24641/34238 cut-off events. [2022-12-13 19:50:54,387 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-12-13 19:50:54,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68825 conditions, 34238 events. 24641/34238 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 2075. Compared 209391 event pairs, 21420 based on Foata normal form. 0/10677 useless extension candidates. Maximal degree in co-relation 68817. Up to 11412 conditions per place. [2022-12-13 19:50:54,492 INFO L137 encePairwiseOnDemand]: 561/573 looper letters, 164 selfloop transitions, 27 changer transitions 0/191 dead transitions. [2022-12-13 19:50:54,493 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 191 transitions, 842 flow [2022-12-13 19:50:54,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:50:54,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:50:54,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1442 transitions. [2022-12-13 19:50:54,496 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41942990110529377 [2022-12-13 19:50:54,496 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1442 transitions. [2022-12-13 19:50:54,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1442 transitions. [2022-12-13 19:50:54,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:50:54,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1442 transitions. [2022-12-13 19:50:54,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 240.33333333333334) internal successors, (1442), 6 states have internal predecessors, (1442), 0 states have call successors, (0), 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 19:50:54,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 573.0) internal successors, (4011), 7 states have internal predecessors, (4011), 0 states have call successors, (0), 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 19:50:54,504 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 573.0) internal successors, (4011), 7 states have internal predecessors, (4011), 0 states have call successors, (0), 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 19:50:54,504 INFO L175 Difference]: Start difference. First operand has 63 places, 66 transitions, 168 flow. Second operand 6 states and 1442 transitions. [2022-12-13 19:50:54,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 191 transitions, 842 flow [2022-12-13 19:50:54,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 191 transitions, 841 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:50:54,506 INFO L231 Difference]: Finished difference. Result has 71 places, 87 transitions, 371 flow [2022-12-13 19:50:54,506 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=371, PETRI_PLACES=71, PETRI_TRANSITIONS=87} [2022-12-13 19:50:54,507 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 2 predicate places. [2022-12-13 19:50:54,507 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 87 transitions, 371 flow [2022-12-13 19:50:54,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 208.0) internal successors, (1248), 6 states have internal predecessors, (1248), 0 states have call successors, (0), 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 19:50:54,508 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:50:54,508 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 19:50:54,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:50:54,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:50:54,709 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 19:50:54,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:50:54,709 INFO L85 PathProgramCache]: Analyzing trace with hash 43341905, now seen corresponding path program 1 times [2022-12-13 19:50:54,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:50:54,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1778461736] [2022-12-13 19:50:54,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:50:54,710 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 19:50:54,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:50:54,712 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:50:54,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:50:54,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:50:54,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 19:50:54,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:50:54,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:50:54,914 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-12-13 19:50:54,914 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 19:50:55,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:50:55,174 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 19:50:55,174 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 19:50:55,458 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-12-13 19:50:55,458 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 55 treesize of output 80 [2022-12-13 19:50:58,049 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 19:50:58,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:50:58,049 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:50:58,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1778461736] [2022-12-13 19:50:58,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1778461736] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:50:58,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:50:58,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:50:58,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403415140] [2022-12-13 19:50:58,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:50:58,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:50:58,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:50:58,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:50:58,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-12-13 19:51:00,167 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] [2022-12-13 19:51:02,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:51:04,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:51:06,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:51:08,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:51:09,032 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 573 [2022-12-13 19:51:09,033 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 87 transitions, 371 flow. Second operand has 5 states, 5 states have (on average 198.8) internal successors, (994), 5 states have internal predecessors, (994), 0 states have call successors, (0), 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 19:51:09,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:51:09,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 573 [2022-12-13 19:51:09,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:51:12,235 INFO L130 PetriNetUnfolder]: 18906/26589 cut-off events. [2022-12-13 19:51:12,235 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-12-13 19:51:12,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53601 conditions, 26589 events. 18906/26589 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 1583. Compared 161064 event pairs, 16380 based on Foata normal form. 0/9008 useless extension candidates. Maximal degree in co-relation 53588. Up to 26589 conditions per place. [2022-12-13 19:51:12,321 INFO L137 encePairwiseOnDemand]: 570/573 looper letters, 82 selfloop transitions, 1 changer transitions 0/83 dead transitions. [2022-12-13 19:51:12,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 83 transitions, 517 flow [2022-12-13 19:51:12,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:51:12,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:51:12,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 655 transitions. [2022-12-13 19:51:12,324 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38103548574752766 [2022-12-13 19:51:12,324 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 655 transitions. [2022-12-13 19:51:12,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 655 transitions. [2022-12-13 19:51:12,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:51:12,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 655 transitions. [2022-12-13 19:51:12,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.33333333333334) internal successors, (655), 3 states have internal predecessors, (655), 0 states have call successors, (0), 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 19:51:12,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 573.0) internal successors, (2292), 4 states have internal predecessors, (2292), 0 states have call successors, (0), 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 19:51:12,331 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 573.0) internal successors, (2292), 4 states have internal predecessors, (2292), 0 states have call successors, (0), 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 19:51:12,331 INFO L175 Difference]: Start difference. First operand has 71 places, 87 transitions, 371 flow. Second operand 3 states and 655 transitions. [2022-12-13 19:51:12,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 83 transitions, 517 flow [2022-12-13 19:51:12,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 83 transitions, 487 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-12-13 19:51:12,335 INFO L231 Difference]: Finished difference. Result has 70 places, 83 transitions, 323 flow [2022-12-13 19:51:12,335 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=323, PETRI_PLACES=70, PETRI_TRANSITIONS=83} [2022-12-13 19:51:12,336 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 1 predicate places. [2022-12-13 19:51:12,336 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 83 transitions, 323 flow [2022-12-13 19:51:12,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 198.8) internal successors, (994), 5 states have internal predecessors, (994), 0 states have call successors, (0), 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 19:51:12,337 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:51:12,337 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 19:51:12,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:51:12,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:51:12,539 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 19:51:12,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:51:12,540 INFO L85 PathProgramCache]: Analyzing trace with hash 43341906, now seen corresponding path program 1 times [2022-12-13 19:51:12,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:51:12,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434363742] [2022-12-13 19:51:12,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:51:12,541 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 19:51:12,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:51:12,543 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:51:12,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:51:12,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:12,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 19:51:12,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:51:12,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:51:12,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:51:12,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:51:12,715 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 19:51:12,715 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 19:51:12,739 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-13 19:51:12,739 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 90 treesize of output 89 [2022-12-13 19:51:12,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:51:12,785 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 19:51:12,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:51:12,803 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 19:51:12,823 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 19:51:12,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:51:12,823 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:51:12,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434363742] [2022-12-13 19:51:12,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [434363742] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:51:12,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:51:12,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:51:12,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875047851] [2022-12-13 19:51:12,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:51:12,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:51:12,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:51:12,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:51:12,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:51:13,055 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 573 [2022-12-13 19:51:13,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 83 transitions, 323 flow. Second operand has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 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 19:51:13,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:51:13,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 573 [2022-12-13 19:51:13,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:51:15,149 INFO L130 PetriNetUnfolder]: 13171/18940 cut-off events. [2022-12-13 19:51:15,149 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-12-13 19:51:15,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38277 conditions, 18940 events. 13171/18940 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 1091. Compared 114174 event pairs, 11340 based on Foata normal form. 0/7328 useless extension candidates. Maximal degree in co-relation 38263. Up to 18940 conditions per place. [2022-12-13 19:51:15,200 INFO L137 encePairwiseOnDemand]: 570/573 looper letters, 78 selfloop transitions, 1 changer transitions 0/79 dead transitions. [2022-12-13 19:51:15,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 79 transitions, 461 flow [2022-12-13 19:51:15,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:51:15,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:51:15,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 746 transitions. [2022-12-13 19:51:15,203 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4339732402559628 [2022-12-13 19:51:15,203 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 746 transitions. [2022-12-13 19:51:15,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 746 transitions. [2022-12-13 19:51:15,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:51:15,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 746 transitions. [2022-12-13 19:51:15,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 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 19:51:15,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 573.0) internal successors, (2292), 4 states have internal predecessors, (2292), 0 states have call successors, (0), 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 19:51:15,210 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 573.0) internal successors, (2292), 4 states have internal predecessors, (2292), 0 states have call successors, (0), 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 19:51:15,211 INFO L175 Difference]: Start difference. First operand has 70 places, 83 transitions, 323 flow. Second operand 3 states and 746 transitions. [2022-12-13 19:51:15,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 79 transitions, 461 flow [2022-12-13 19:51:15,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 79 transitions, 460 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:51:15,214 INFO L231 Difference]: Finished difference. Result has 69 places, 79 transitions, 304 flow [2022-12-13 19:51:15,214 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=304, PETRI_PLACES=69, PETRI_TRANSITIONS=79} [2022-12-13 19:51:15,214 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 0 predicate places. [2022-12-13 19:51:15,215 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 79 transitions, 304 flow [2022-12-13 19:51:15,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 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 19:51:15,215 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:51:15,215 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 19:51:15,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:51:15,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:51:15,417 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 19:51:15,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:51:15,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1298068476, now seen corresponding path program 1 times [2022-12-13 19:51:15,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:51:15,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1126482820] [2022-12-13 19:51:15,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:51:15,420 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 19:51:15,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:51:15,423 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:51:15,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:51:15,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:15,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 19:51:15,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:51:15,581 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 19:51:15,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:51:15,581 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:51:15,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1126482820] [2022-12-13 19:51:15,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1126482820] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:51:15,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:51:15,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:51:15,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777990101] [2022-12-13 19:51:15,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:51:15,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:51:15,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:51:15,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:51:15,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:51:15,591 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 573 [2022-12-13 19:51:15,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 79 transitions, 304 flow. Second operand has 3 states, 3 states have (on average 235.0) internal successors, (705), 3 states have internal predecessors, (705), 0 states have call successors, (0), 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 19:51:15,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:51:15,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 573 [2022-12-13 19:51:15,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:51:17,840 INFO L130 PetriNetUnfolder]: 13987/20155 cut-off events. [2022-12-13 19:51:17,840 INFO L131 PetriNetUnfolder]: For 180/180 co-relation queries the response was YES. [2022-12-13 19:51:17,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40699 conditions, 20155 events. 13987/20155 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 1243. Compared 128451 event pairs, 4785 based on Foata normal form. 3/7868 useless extension candidates. Maximal degree in co-relation 40684. Up to 18820 conditions per place. [2022-12-13 19:51:17,915 INFO L137 encePairwiseOnDemand]: 564/573 looper letters, 98 selfloop transitions, 3 changer transitions 1/102 dead transitions. [2022-12-13 19:51:17,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 102 transitions, 558 flow [2022-12-13 19:51:17,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:51:17,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:51:17,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 785 transitions. [2022-12-13 19:51:17,918 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4566608493310064 [2022-12-13 19:51:17,918 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 785 transitions. [2022-12-13 19:51:17,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 785 transitions. [2022-12-13 19:51:17,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:51:17,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 785 transitions. [2022-12-13 19:51:17,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 261.6666666666667) internal successors, (785), 3 states have internal predecessors, (785), 0 states have call successors, (0), 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 19:51:17,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 573.0) internal successors, (2292), 4 states have internal predecessors, (2292), 0 states have call successors, (0), 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 19:51:17,921 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 573.0) internal successors, (2292), 4 states have internal predecessors, (2292), 0 states have call successors, (0), 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 19:51:17,921 INFO L175 Difference]: Start difference. First operand has 69 places, 79 transitions, 304 flow. Second operand 3 states and 785 transitions. [2022-12-13 19:51:17,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 102 transitions, 558 flow [2022-12-13 19:51:17,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 102 transitions, 557 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:51:17,924 INFO L231 Difference]: Finished difference. Result has 71 places, 81 transitions, 332 flow [2022-12-13 19:51:17,924 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=332, PETRI_PLACES=71, PETRI_TRANSITIONS=81} [2022-12-13 19:51:17,924 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 2 predicate places. [2022-12-13 19:51:17,925 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 81 transitions, 332 flow [2022-12-13 19:51:17,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 235.0) internal successors, (705), 3 states have internal predecessors, (705), 0 states have call successors, (0), 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 19:51:17,925 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:51:17,925 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 19:51:17,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:51:18,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:51:18,126 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 19:51:18,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:51:18,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1298068463, now seen corresponding path program 1 times [2022-12-13 19:51:18,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:51:18,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983344709] [2022-12-13 19:51:18,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:51:18,127 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 19:51:18,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:51:18,128 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:51:18,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:51:18,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:18,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 19:51:18,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:51:18,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:51:18,281 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-12-13 19:51:18,281 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 19:51:18,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:51:18,466 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-12-13 19:51:18,466 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 19:51:18,612 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-12-13 19:51:18,612 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 19:51:18,699 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 19:51:18,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:51:18,700 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:51:18,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983344709] [2022-12-13 19:51:18,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983344709] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:51:18,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:51:18,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:51:18,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158420781] [2022-12-13 19:51:18,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:51:18,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:51:18,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:51:18,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:51:18,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:51:19,130 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 573 [2022-12-13 19:51:19,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 81 transitions, 332 flow. Second operand has 4 states, 4 states have (on average 230.5) internal successors, (922), 4 states have internal predecessors, (922), 0 states have call successors, (0), 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 19:51:19,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:51:19,131 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 573 [2022-12-13 19:51:19,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:51:21,367 INFO L130 PetriNetUnfolder]: 13594/19561 cut-off events. [2022-12-13 19:51:21,367 INFO L131 PetriNetUnfolder]: For 1716/1716 co-relation queries the response was YES. [2022-12-13 19:51:21,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43200 conditions, 19561 events. 13594/19561 cut-off events. For 1716/1716 co-relation queries the response was YES. Maximal size of possible extension queue 1216. Compared 120500 event pairs, 11196 based on Foata normal form. 0/9722 useless extension candidates. Maximal degree in co-relation 43183. Up to 19561 conditions per place. [2022-12-13 19:51:21,439 INFO L137 encePairwiseOnDemand]: 570/573 looper letters, 78 selfloop transitions, 1 changer transitions 0/79 dead transitions. [2022-12-13 19:51:21,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 79 transitions, 486 flow [2022-12-13 19:51:21,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:51:21,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:51:21,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 744 transitions. [2022-12-13 19:51:21,442 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4328097731239092 [2022-12-13 19:51:21,442 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 744 transitions. [2022-12-13 19:51:21,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 744 transitions. [2022-12-13 19:51:21,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:51:21,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 744 transitions. [2022-12-13 19:51:21,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.0) internal successors, (744), 3 states have internal predecessors, (744), 0 states have call successors, (0), 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 19:51:21,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 573.0) internal successors, (2292), 4 states have internal predecessors, (2292), 0 states have call successors, (0), 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 19:51:21,446 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 573.0) internal successors, (2292), 4 states have internal predecessors, (2292), 0 states have call successors, (0), 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 19:51:21,446 INFO L175 Difference]: Start difference. First operand has 71 places, 81 transitions, 332 flow. Second operand 3 states and 744 transitions. [2022-12-13 19:51:21,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 79 transitions, 486 flow [2022-12-13 19:51:21,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 79 transitions, 483 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:51:21,450 INFO L231 Difference]: Finished difference. Result has 70 places, 79 transitions, 327 flow [2022-12-13 19:51:21,450 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=327, PETRI_PLACES=70, PETRI_TRANSITIONS=79} [2022-12-13 19:51:21,450 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 1 predicate places. [2022-12-13 19:51:21,450 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 79 transitions, 327 flow [2022-12-13 19:51:21,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 230.5) internal successors, (922), 4 states have internal predecessors, (922), 0 states have call successors, (0), 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 19:51:21,451 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:51:21,451 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 19:51:21,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:51:21,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:51:21,653 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 19:51:21,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:51:21,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1298068465, now seen corresponding path program 1 times [2022-12-13 19:51:21,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:51:21,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527691734] [2022-12-13 19:51:21,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:51:21,656 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 19:51:21,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:51:21,659 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:51:21,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:51:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:21,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 19:51:21,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:51:21,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:51:21,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:51:21,921 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-12-13 19:51:21,921 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 19:51:21,937 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 19:51:21,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:51:21,983 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 19:51:22,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:51:22,001 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 19:51:22,038 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 19:51:22,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:51:22,038 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:51:22,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527691734] [2022-12-13 19:51:22,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1527691734] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:51:22,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:51:22,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:51:22,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706942365] [2022-12-13 19:51:22,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:51:22,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:51:22,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:51:22,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:51:22,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:51:22,243 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 573 [2022-12-13 19:51:22,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 79 transitions, 327 flow. Second operand has 4 states, 4 states have (on average 230.5) internal successors, (922), 4 states have internal predecessors, (922), 0 states have call successors, (0), 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 19:51:22,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:51:22,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 573 [2022-12-13 19:51:22,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:51:24,370 INFO L130 PetriNetUnfolder]: 13201/18967 cut-off events. [2022-12-13 19:51:24,370 INFO L131 PetriNetUnfolder]: For 1650/1650 co-relation queries the response was YES. [2022-12-13 19:51:24,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41743 conditions, 18967 events. 13201/18967 cut-off events. For 1650/1650 co-relation queries the response was YES. Maximal size of possible extension queue 1196. Compared 115989 event pairs, 10866 based on Foata normal form. 0/9545 useless extension candidates. Maximal degree in co-relation 41725. Up to 18967 conditions per place. [2022-12-13 19:51:24,436 INFO L137 encePairwiseOnDemand]: 570/573 looper letters, 76 selfloop transitions, 1 changer transitions 0/77 dead transitions. [2022-12-13 19:51:24,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 77 transitions, 477 flow [2022-12-13 19:51:24,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:51:24,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:51:24,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 742 transitions. [2022-12-13 19:51:24,438 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4316463059918557 [2022-12-13 19:51:24,439 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 742 transitions. [2022-12-13 19:51:24,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 742 transitions. [2022-12-13 19:51:24,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:51:24,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 742 transitions. [2022-12-13 19:51:24,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.33333333333334) internal successors, (742), 3 states have internal predecessors, (742), 0 states have call successors, (0), 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 19:51:24,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 573.0) internal successors, (2292), 4 states have internal predecessors, (2292), 0 states have call successors, (0), 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 19:51:24,442 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 573.0) internal successors, (2292), 4 states have internal predecessors, (2292), 0 states have call successors, (0), 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 19:51:24,442 INFO L175 Difference]: Start difference. First operand has 70 places, 79 transitions, 327 flow. Second operand 3 states and 742 transitions. [2022-12-13 19:51:24,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 77 transitions, 477 flow [2022-12-13 19:51:24,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 77 transitions, 476 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:51:24,444 INFO L231 Difference]: Finished difference. Result has 69 places, 77 transitions, 324 flow [2022-12-13 19:51:24,444 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=69, PETRI_TRANSITIONS=77} [2022-12-13 19:51:24,445 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 0 predicate places. [2022-12-13 19:51:24,445 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 77 transitions, 324 flow [2022-12-13 19:51:24,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 230.5) internal successors, (922), 4 states have internal predecessors, (922), 0 states have call successors, (0), 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 19:51:24,445 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:51:24,445 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 19:51:24,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:51:24,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:51:24,647 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 19:51:24,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:51:24,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1343882295, now seen corresponding path program 2 times [2022-12-13 19:51:24,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:51:24,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1353774631] [2022-12-13 19:51:24,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:51:24,650 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 19:51:24,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:51:24,653 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:51:24,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:51:24,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:51:24,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:51:24,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 19:51:24,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:51:24,846 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:51:24,846 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 19:51:24,966 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 19:51:24,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:51:25,484 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 19:51:25,484 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:51:25,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1353774631] [2022-12-13 19:51:25,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1353774631] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:51:25,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:51:25,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 19:51:25,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038703777] [2022-12-13 19:51:25,484 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:51:25,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:51:25,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:51:25,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:51:25,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 19:51:30,280 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 573 [2022-12-13 19:51:30,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 77 transitions, 324 flow. Second operand has 12 states, 12 states have (on average 211.0) internal successors, (2532), 12 states have internal predecessors, (2532), 0 states have call successors, (0), 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 19:51:30,282 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:51:30,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 573 [2022-12-13 19:51:30,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:51:32,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:51:34,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:51:37,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:51:38,595 WARN L539 Checker$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 19:51:41,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:51:43,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:51:45,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:51:47,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:51:51,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:51:54,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:52:07,324 INFO L130 PetriNetUnfolder]: 43984/63182 cut-off events. [2022-12-13 19:52:07,324 INFO L131 PetriNetUnfolder]: For 5526/5526 co-relation queries the response was YES. [2022-12-13 19:52:07,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138941 conditions, 63182 events. 43984/63182 cut-off events. For 5526/5526 co-relation queries the response was YES. Maximal size of possible extension queue 2201. Compared 423198 event pairs, 36220 based on Foata normal form. 16/31784 useless extension candidates. Maximal degree in co-relation 138922. Up to 11391 conditions per place. [2022-12-13 19:52:07,579 INFO L137 encePairwiseOnDemand]: 563/573 looper letters, 469 selfloop transitions, 53 changer transitions 0/522 dead transitions. [2022-12-13 19:52:07,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 522 transitions, 2660 flow [2022-12-13 19:52:07,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 19:52:07,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 19:52:07,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3668 transitions. [2022-12-13 19:52:07,587 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42675974403723094 [2022-12-13 19:52:07,587 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3668 transitions. [2022-12-13 19:52:07,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3668 transitions. [2022-12-13 19:52:07,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:52:07,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3668 transitions. [2022-12-13 19:52:07,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 244.53333333333333) internal successors, (3668), 15 states have internal predecessors, (3668), 0 states have call successors, (0), 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 19:52:07,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 573.0) internal successors, (9168), 16 states have internal predecessors, (9168), 0 states have call successors, (0), 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 19:52:07,603 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 573.0) internal successors, (9168), 16 states have internal predecessors, (9168), 0 states have call successors, (0), 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 19:52:07,603 INFO L175 Difference]: Start difference. First operand has 69 places, 77 transitions, 324 flow. Second operand 15 states and 3668 transitions. [2022-12-13 19:52:07,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 522 transitions, 2660 flow [2022-12-13 19:52:07,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 522 transitions, 2659 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:52:07,610 INFO L231 Difference]: Finished difference. Result has 92 places, 109 transitions, 721 flow [2022-12-13 19:52:07,610 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=721, PETRI_PLACES=92, PETRI_TRANSITIONS=109} [2022-12-13 19:52:07,610 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 23 predicate places. [2022-12-13 19:52:07,610 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 109 transitions, 721 flow [2022-12-13 19:52:07,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 211.0) internal successors, (2532), 12 states have internal predecessors, (2532), 0 states have call successors, (0), 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 19:52:07,611 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:52:07,611 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:52:07,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:52:07,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:52:07,813 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 19:52:07,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:52:07,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1903243249, now seen corresponding path program 1 times [2022-12-13 19:52:07,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:52:07,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [766327269] [2022-12-13 19:52:07,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:07,814 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 19:52:07,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:52:07,815 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:52:07,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:52:07,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:07,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 19:52:07,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:52:07,984 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 19:52:07,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:52:07,984 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:52:07,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [766327269] [2022-12-13 19:52:07,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [766327269] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:52:07,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:52:07,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:52:07,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222235885] [2022-12-13 19:52:07,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:52:07,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:52:07,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:52:07,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:52:07,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:52:07,990 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 573 [2022-12-13 19:52:07,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 109 transitions, 721 flow. Second operand has 3 states, 3 states have (on average 235.66666666666666) internal successors, (707), 3 states have internal predecessors, (707), 0 states have call successors, (0), 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 19:52:07,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:52:07,992 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 573 [2022-12-13 19:52:07,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:52:14,842 INFO L130 PetriNetUnfolder]: 39804/57262 cut-off events. [2022-12-13 19:52:14,843 INFO L131 PetriNetUnfolder]: For 3957/3957 co-relation queries the response was YES. [2022-12-13 19:52:14,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125697 conditions, 57262 events. 39804/57262 cut-off events. For 3957/3957 co-relation queries the response was YES. Maximal size of possible extension queue 1790. Compared 376514 event pairs, 14150 based on Foata normal form. 1440/31700 useless extension candidates. Maximal degree in co-relation 125667. Up to 48391 conditions per place. [2022-12-13 19:52:15,233 INFO L137 encePairwiseOnDemand]: 568/573 looper letters, 130 selfloop transitions, 2 changer transitions 0/132 dead transitions. [2022-12-13 19:52:15,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 132 transitions, 1046 flow [2022-12-13 19:52:15,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:52:15,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:52:15,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 779 transitions. [2022-12-13 19:52:15,236 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45317044793484584 [2022-12-13 19:52:15,236 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 779 transitions. [2022-12-13 19:52:15,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 779 transitions. [2022-12-13 19:52:15,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:52:15,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 779 transitions. [2022-12-13 19:52:15,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 259.6666666666667) internal successors, (779), 3 states have internal predecessors, (779), 0 states have call successors, (0), 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 19:52:15,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 573.0) internal successors, (2292), 4 states have internal predecessors, (2292), 0 states have call successors, (0), 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 19:52:15,240 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 573.0) internal successors, (2292), 4 states have internal predecessors, (2292), 0 states have call successors, (0), 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 19:52:15,240 INFO L175 Difference]: Start difference. First operand has 92 places, 109 transitions, 721 flow. Second operand 3 states and 779 transitions. [2022-12-13 19:52:15,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 132 transitions, 1046 flow [2022-12-13 19:52:15,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 132 transitions, 944 flow, removed 25 selfloop flow, removed 4 redundant places. [2022-12-13 19:52:15,245 INFO L231 Difference]: Finished difference. Result has 91 places, 109 transitions, 631 flow [2022-12-13 19:52:15,245 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=631, PETRI_PLACES=91, PETRI_TRANSITIONS=109} [2022-12-13 19:52:15,245 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 22 predicate places. [2022-12-13 19:52:15,245 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 109 transitions, 631 flow [2022-12-13 19:52:15,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 235.66666666666666) internal successors, (707), 3 states have internal predecessors, (707), 0 states have call successors, (0), 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 19:52:15,246 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:52:15,246 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:52:15,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:52:15,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:52:15,448 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 19:52:15,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:52:15,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1903243183, now seen corresponding path program 1 times [2022-12-13 19:52:15,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:52:15,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [567026625] [2022-12-13 19:52:15,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:15,451 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 19:52:15,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:52:15,454 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:52:15,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:52:15,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:15,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 19:52:15,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:52:15,659 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-13 19:52:15,659 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 19:52:15,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:52:15,693 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 19:52:15,724 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 19:52:15,724 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 19:52:15,774 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 19:52:15,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:52:15,774 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:52:15,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [567026625] [2022-12-13 19:52:15,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [567026625] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:52:15,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:52:15,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:52:15,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753167125] [2022-12-13 19:52:15,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:52:15,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:52:15,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:52:15,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:52:15,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:52:15,982 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 573 [2022-12-13 19:52:15,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 109 transitions, 631 flow. Second operand has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 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 19:52:15,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:52:15,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 573 [2022-12-13 19:52:15,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:52:23,206 INFO L130 PetriNetUnfolder]: 39584/56822 cut-off events. [2022-12-13 19:52:23,206 INFO L131 PetriNetUnfolder]: For 8033/8033 co-relation queries the response was YES. [2022-12-13 19:52:23,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132147 conditions, 56822 events. 39584/56822 cut-off events. For 8033/8033 co-relation queries the response was YES. Maximal size of possible extension queue 1670. Compared 381734 event pairs, 34280 based on Foata normal form. 0/32102 useless extension candidates. Maximal degree in co-relation 132115. Up to 56822 conditions per place. [2022-12-13 19:52:23,526 INFO L137 encePairwiseOnDemand]: 570/573 looper letters, 106 selfloop transitions, 1 changer transitions 0/107 dead transitions. [2022-12-13 19:52:23,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 107 transitions, 841 flow [2022-12-13 19:52:23,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:52:23,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:52:23,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 728 transitions. [2022-12-13 19:52:23,528 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4235020360674811 [2022-12-13 19:52:23,528 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 728 transitions. [2022-12-13 19:52:23,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 728 transitions. [2022-12-13 19:52:23,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:52:23,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 728 transitions. [2022-12-13 19:52:23,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 0 states have call successors, (0), 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 19:52:23,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 573.0) internal successors, (2292), 4 states have internal predecessors, (2292), 0 states have call successors, (0), 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 19:52:23,532 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 573.0) internal successors, (2292), 4 states have internal predecessors, (2292), 0 states have call successors, (0), 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 19:52:23,532 INFO L175 Difference]: Start difference. First operand has 91 places, 109 transitions, 631 flow. Second operand 3 states and 728 transitions. [2022-12-13 19:52:23,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 107 transitions, 841 flow [2022-12-13 19:52:23,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 107 transitions, 839 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:52:23,537 INFO L231 Difference]: Finished difference. Result has 90 places, 107 transitions, 627 flow [2022-12-13 19:52:23,537 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=627, PETRI_PLACES=90, PETRI_TRANSITIONS=107} [2022-12-13 19:52:23,537 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 21 predicate places. [2022-12-13 19:52:23,537 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 107 transitions, 627 flow [2022-12-13 19:52:23,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 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 19:52:23,538 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:52:23,538 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:52:23,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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)] Forceful destruction successful, exit code 0 [2022-12-13 19:52:23,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:52:23,739 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 19:52:23,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:52:23,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1903243182, now seen corresponding path program 1 times [2022-12-13 19:52:23,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:52:23,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2022616091] [2022-12-13 19:52:23,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:23,742 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 19:52:23,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:52:23,745 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:52:23,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:52:23,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:23,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 19:52:23,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:52:23,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:52:23,986 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-12-13 19:52:23,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-12-13 19:52:23,999 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 120 treesize of output 116 [2022-12-13 19:52:24,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:52:24,035 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 19:52:24,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:52:24,062 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 19:52:24,113 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 19:52:24,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:52:24,114 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:52:24,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2022616091] [2022-12-13 19:52:24,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2022616091] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:52:24,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:52:24,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:52:24,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685734061] [2022-12-13 19:52:24,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:52:24,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:52:24,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:52:24,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:52:24,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:52:24,320 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 573 [2022-12-13 19:52:24,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 107 transitions, 627 flow. Second operand has 5 states, 5 states have (on average 228.6) internal successors, (1143), 5 states have internal predecessors, (1143), 0 states have call successors, (0), 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 19:52:24,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:52:24,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 573 [2022-12-13 19:52:24,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:52:31,906 INFO L130 PetriNetUnfolder]: 39364/56382 cut-off events. [2022-12-13 19:52:31,906 INFO L131 PetriNetUnfolder]: For 8003/8003 co-relation queries the response was YES. [2022-12-13 19:52:32,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130958 conditions, 56382 events. 39364/56382 cut-off events. For 8003/8003 co-relation queries the response was YES. Maximal size of possible extension queue 1658. Compared 376861 event pairs, 34080 based on Foata normal form. 0/31982 useless extension candidates. Maximal degree in co-relation 130925. Up to 56382 conditions per place. [2022-12-13 19:52:32,206 INFO L137 encePairwiseOnDemand]: 570/573 looper letters, 104 selfloop transitions, 1 changer transitions 0/105 dead transitions. [2022-12-13 19:52:32,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 105 transitions, 833 flow [2022-12-13 19:52:32,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:52:32,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:52:32,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 732 transitions. [2022-12-13 19:52:32,208 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4258289703315881 [2022-12-13 19:52:32,208 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 732 transitions. [2022-12-13 19:52:32,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 732 transitions. [2022-12-13 19:52:32,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:52:32,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 732 transitions. [2022-12-13 19:52:32,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.0) internal successors, (732), 3 states have internal predecessors, (732), 0 states have call successors, (0), 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 19:52:32,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 573.0) internal successors, (2292), 4 states have internal predecessors, (2292), 0 states have call successors, (0), 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 19:52:32,211 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 573.0) internal successors, (2292), 4 states have internal predecessors, (2292), 0 states have call successors, (0), 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 19:52:32,211 INFO L175 Difference]: Start difference. First operand has 90 places, 107 transitions, 627 flow. Second operand 3 states and 732 transitions. [2022-12-13 19:52:32,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 105 transitions, 833 flow [2022-12-13 19:52:32,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 105 transitions, 832 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:52:32,216 INFO L231 Difference]: Finished difference. Result has 89 places, 105 transitions, 624 flow [2022-12-13 19:52:32,216 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=624, PETRI_PLACES=89, PETRI_TRANSITIONS=105} [2022-12-13 19:52:32,216 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 20 predicate places. [2022-12-13 19:52:32,216 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 105 transitions, 624 flow [2022-12-13 19:52:32,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 228.6) internal successors, (1143), 5 states have internal predecessors, (1143), 0 states have call successors, (0), 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 19:52:32,217 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:52:32,217 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:52:32,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:52:32,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:52:32,418 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 19:52:32,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:52:32,419 INFO L85 PathProgramCache]: Analyzing trace with hash 639403048, now seen corresponding path program 1 times [2022-12-13 19:52:32,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:52:32,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214800246] [2022-12-13 19:52:32,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:32,421 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 19:52:32,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:52:32,424 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:52:32,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:52:32,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:32,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 19:52:32,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:52:32,568 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 19:52:32,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:52:32,568 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:52:32,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1214800246] [2022-12-13 19:52:32,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1214800246] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:52:32,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:52:32,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:52:32,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742655419] [2022-12-13 19:52:32,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:52:32,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:52:32,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:52:32,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:52:32,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:52:32,661 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 573 [2022-12-13 19:52:32,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 105 transitions, 624 flow. Second operand has 4 states, 4 states have (on average 225.5) internal successors, (902), 4 states have internal predecessors, (902), 0 states have call successors, (0), 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 19:52:32,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:52:32,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 573 [2022-12-13 19:52:32,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:52:39,999 INFO L130 PetriNetUnfolder]: 39746/57210 cut-off events. [2022-12-13 19:52:39,999 INFO L131 PetriNetUnfolder]: For 8242/8242 co-relation queries the response was YES. [2022-12-13 19:52:40,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132834 conditions, 57210 events. 39746/57210 cut-off events. For 8242/8242 co-relation queries the response was YES. Maximal size of possible extension queue 1671. Compared 384965 event pairs, 34450 based on Foata normal form. 140/32950 useless extension candidates. Maximal degree in co-relation 132800. Up to 56381 conditions per place. [2022-12-13 19:52:40,357 INFO L137 encePairwiseOnDemand]: 567/573 looper letters, 137 selfloop transitions, 3 changer transitions 19/159 dead transitions. [2022-12-13 19:52:40,357 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 159 transitions, 1290 flow [2022-12-13 19:52:40,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:52:40,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:52:40,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 966 transitions. [2022-12-13 19:52:40,360 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4214659685863874 [2022-12-13 19:52:40,360 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 966 transitions. [2022-12-13 19:52:40,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 966 transitions. [2022-12-13 19:52:40,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:52:40,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 966 transitions. [2022-12-13 19:52:40,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 241.5) internal successors, (966), 4 states have internal predecessors, (966), 0 states have call successors, (0), 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 19:52:40,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 573.0) internal successors, (2865), 5 states have internal predecessors, (2865), 0 states have call successors, (0), 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 19:52:40,366 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 573.0) internal successors, (2865), 5 states have internal predecessors, (2865), 0 states have call successors, (0), 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 19:52:40,366 INFO L175 Difference]: Start difference. First operand has 89 places, 105 transitions, 624 flow. Second operand 4 states and 966 transitions. [2022-12-13 19:52:40,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 159 transitions, 1290 flow [2022-12-13 19:52:40,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 159 transitions, 1289 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:52:40,373 INFO L231 Difference]: Finished difference. Result has 92 places, 105 transitions, 636 flow [2022-12-13 19:52:40,373 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=636, PETRI_PLACES=92, PETRI_TRANSITIONS=105} [2022-12-13 19:52:40,374 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 23 predicate places. [2022-12-13 19:52:40,374 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 105 transitions, 636 flow [2022-12-13 19:52:40,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 225.5) internal successors, (902), 4 states have internal predecessors, (902), 0 states have call successors, (0), 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 19:52:40,374 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:52:40,374 INFO L209 CegarLoopForPetriNet]: trace histogram [8, 1, 1, 1] [2022-12-13 19:52:40,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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)] Forceful destruction successful, exit code 0 [2022-12-13 19:52:40,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:52:40,576 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 19:52:40,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:52:40,578 INFO L85 PathProgramCache]: Analyzing trace with hash 2053423229, now seen corresponding path program 1 times [2022-12-13 19:52:40,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:52:40,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075270259] [2022-12-13 19:52:40,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:40,580 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 19:52:40,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:52:40,583 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:52:40,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:52:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:40,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 19:52:40,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:52:40,718 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 19:52:40,981 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:40,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:52:42,794 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:42,794 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:52:42,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075270259] [2022-12-13 19:52:42,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075270259] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:52:42,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:52:42,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-12-13 19:52:42,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307363707] [2022-12-13 19:52:42,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:52:42,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 19:52:42,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:52:42,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 19:52:42,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-12-13 19:52:54,883 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 573 [2022-12-13 19:52:54,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 105 transitions, 636 flow. Second operand has 20 states, 20 states have (on average 211.05) internal successors, (4221), 20 states have internal predecessors, (4221), 0 states have call successors, (0), 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 19:52:54,885 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:52:54,885 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 573 [2022-12-13 19:52:54,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:52:58,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:53:00,732 WARN L539 Checker$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 19:53:02,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:53:04,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:53:06,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:53:07,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:53:09,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:53:11,696 WARN L539 Checker$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 19:53:17,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:53:19,055 WARN L539 Checker$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 19:53:21,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:53:22,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:53:24,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:53:26,625 WARN L539 Checker$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 19:53:28,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:53:30,630 WARN L539 Checker$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 19:53:47,327 INFO L130 PetriNetUnfolder]: 47703/68662 cut-off events. [2022-12-13 19:53:47,327 INFO L131 PetriNetUnfolder]: For 13396/13396 co-relation queries the response was YES. [2022-12-13 19:53:47,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165477 conditions, 68662 events. 47703/68662 cut-off events. For 13396/13396 co-relation queries the response was YES. Maximal size of possible extension queue 1888. Compared 468765 event pairs, 41340 based on Foata normal form. 23/42357 useless extension candidates. Maximal degree in co-relation 165441. Up to 12889 conditions per place. [2022-12-13 19:53:47,789 INFO L137 encePairwiseOnDemand]: 563/573 looper letters, 511 selfloop transitions, 71 changer transitions 0/582 dead transitions. [2022-12-13 19:53:47,789 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 582 transitions, 3331 flow [2022-12-13 19:53:47,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 19:53:47,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 19:53:47,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 5190 transitions. [2022-12-13 19:53:47,798 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4117087101380295 [2022-12-13 19:53:47,798 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 5190 transitions. [2022-12-13 19:53:47,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 5190 transitions. [2022-12-13 19:53:47,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:53:47,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 5190 transitions. [2022-12-13 19:53:47,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 235.9090909090909) internal successors, (5190), 22 states have internal predecessors, (5190), 0 states have call successors, (0), 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 19:53:47,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 573.0) internal successors, (13179), 23 states have internal predecessors, (13179), 0 states have call successors, (0), 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 19:53:47,815 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 573.0) internal successors, (13179), 23 states have internal predecessors, (13179), 0 states have call successors, (0), 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 19:53:47,815 INFO L175 Difference]: Start difference. First operand has 92 places, 105 transitions, 636 flow. Second operand 22 states and 5190 transitions. [2022-12-13 19:53:47,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 582 transitions, 3331 flow [2022-12-13 19:53:47,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 582 transitions, 3321 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-12-13 19:53:47,839 INFO L231 Difference]: Finished difference. Result has 124 places, 125 transitions, 986 flow [2022-12-13 19:53:47,839 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=986, PETRI_PLACES=124, PETRI_TRANSITIONS=125} [2022-12-13 19:53:47,840 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 55 predicate places. [2022-12-13 19:53:47,840 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 125 transitions, 986 flow [2022-12-13 19:53:47,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 211.05) internal successors, (4221), 20 states have internal predecessors, (4221), 0 states have call successors, (0), 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 19:53:47,840 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:53:47,841 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:53:47,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:53:48,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:53:48,042 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 19:53:48,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:53:48,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1503367578, now seen corresponding path program 1 times [2022-12-13 19:53:48,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:53:48,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1313668221] [2022-12-13 19:53:48,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:53:48,044 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 19:53:48,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:53:48,047 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:53:48,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:53:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:53:48,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 19:53:48,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:53:48,289 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 19:53:48,290 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 19:53:48,316 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 19:53:48,316 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 19:53:48,330 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 19:53:48,330 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 19:53:48,344 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 19:53:48,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:53:48,345 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:53:48,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1313668221] [2022-12-13 19:53:48,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1313668221] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:53:48,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:53:48,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:53:48,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128493892] [2022-12-13 19:53:48,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:53:48,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:53:48,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:53:48,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:53:48,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:53:48,496 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 573 [2022-12-13 19:53:48,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 125 transitions, 986 flow. Second operand has 4 states, 4 states have (on average 222.75) internal successors, (891), 4 states have internal predecessors, (891), 0 states have call successors, (0), 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 19:53:48,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:53:48,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 573 [2022-12-13 19:53:48,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:53:54,922 INFO L130 PetriNetUnfolder]: 31011/44986 cut-off events. [2022-12-13 19:53:54,922 INFO L131 PetriNetUnfolder]: For 9953/9953 co-relation queries the response was YES. [2022-12-13 19:53:55,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108224 conditions, 44986 events. 31011/44986 cut-off events. For 9953/9953 co-relation queries the response was YES. Maximal size of possible extension queue 1247. Compared 293531 event pairs, 26256 based on Foata normal form. 0/31258 useless extension candidates. Maximal degree in co-relation 108175. Up to 44972 conditions per place. [2022-12-13 19:53:55,208 INFO L137 encePairwiseOnDemand]: 567/573 looper letters, 108 selfloop transitions, 13 changer transitions 0/121 dead transitions. [2022-12-13 19:53:55,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 121 transitions, 1216 flow [2022-12-13 19:53:55,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:53:55,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:53:55,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 929 transitions. [2022-12-13 19:53:55,211 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40532286212914487 [2022-12-13 19:53:55,211 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 929 transitions. [2022-12-13 19:53:55,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 929 transitions. [2022-12-13 19:53:55,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:53:55,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 929 transitions. [2022-12-13 19:53:55,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 232.25) internal successors, (929), 4 states have internal predecessors, (929), 0 states have call successors, (0), 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 19:53:55,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 573.0) internal successors, (2865), 5 states have internal predecessors, (2865), 0 states have call successors, (0), 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 19:53:55,214 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 573.0) internal successors, (2865), 5 states have internal predecessors, (2865), 0 states have call successors, (0), 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 19:53:55,214 INFO L175 Difference]: Start difference. First operand has 124 places, 125 transitions, 986 flow. Second operand 4 states and 929 transitions. [2022-12-13 19:53:55,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 121 transitions, 1216 flow [2022-12-13 19:53:55,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 121 transitions, 1057 flow, removed 26 selfloop flow, removed 10 redundant places. [2022-12-13 19:53:55,223 INFO L231 Difference]: Finished difference. Result has 113 places, 121 transitions, 841 flow [2022-12-13 19:53:55,223 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=841, PETRI_PLACES=113, PETRI_TRANSITIONS=121} [2022-12-13 19:53:55,223 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 44 predicate places. [2022-12-13 19:53:55,223 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 121 transitions, 841 flow [2022-12-13 19:53:55,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 222.75) internal successors, (891), 4 states have internal predecessors, (891), 0 states have call successors, (0), 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 19:53:55,224 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:53:55,224 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:53:55,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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)] Ended with exit code 0 [2022-12-13 19:53:55,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:53:55,424 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 19:53:55,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:53:55,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1503367579, now seen corresponding path program 1 times [2022-12-13 19:53:55,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:53:55,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [208636235] [2022-12-13 19:53:55,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:53:55,425 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 19:53:55,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:53:55,426 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:53:55,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 (17)] Waiting until timeout for monitored process [2022-12-13 19:53:55,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:53:55,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 19:53:55,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:53:55,666 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:53:55,666 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 19:53:55,751 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 19:53:55,751 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 19:53:55,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:53:55,844 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 19:53:55,863 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 19:53:55,863 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 19:53:55,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:53:55,894 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 19:53:55,904 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 19:53:55,905 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 19:53:55,967 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 19:53:55,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:54:06,874 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 19:54:06,874 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:54:06,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [208636235] [2022-12-13 19:54:06,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [208636235] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:54:06,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:54:06,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 19:54:06,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819579484] [2022-12-13 19:54:06,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:54:06,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:54:06,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:54:06,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:54:06,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:54:13,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 19:54:20,345 WARN L539 Checker$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 19:54:27,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 19:54:31,579 WARN L539 Checker$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 19:54:34,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 19:54:37,104 WARN L539 Checker$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 19:54:41,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 19:54:47,543 WARN L539 Checker$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 19:54:50,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 19:54:50,586 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 573 [2022-12-13 19:54:50,587 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 121 transitions, 841 flow. Second operand has 10 states, 10 states have (on average 183.2) internal successors, (1832), 10 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:50,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:54:50,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 573 [2022-12-13 19:54:50,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:55:04,362 WARN L233 SmtUtils]: Spent 13.51s on a formula simplification. DAG size of input: 78 DAG size of output: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 19:55:12,931 WARN L233 SmtUtils]: Spent 6.17s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 19:55:24,799 WARN L233 SmtUtils]: Spent 10.59s on a formula simplification. DAG size of input: 73 DAG size of output: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 19:55:30,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 19:55:31,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 19:55:42,820 WARN L233 SmtUtils]: Spent 8.33s on a formula simplification. DAG size of input: 77 DAG size of output: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 19:55:45,558 WARN L539 Checker$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 19:56:05,941 INFO L130 PetriNetUnfolder]: 67673/98178 cut-off events. [2022-12-13 19:56:05,941 INFO L131 PetriNetUnfolder]: For 24441/24441 co-relation queries the response was YES. [2022-12-13 19:56:06,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235150 conditions, 98178 events. 67673/98178 cut-off events. For 24441/24441 co-relation queries the response was YES. Maximal size of possible extension queue 2430. Compared 699373 event pairs, 56208 based on Foata normal form. 3408/73554 useless extension candidates. Maximal degree in co-relation 235100. Up to 43908 conditions per place. [2022-12-13 19:56:06,690 INFO L137 encePairwiseOnDemand]: 559/573 looper letters, 249 selfloop transitions, 59 changer transitions 0/308 dead transitions. [2022-12-13 19:56:06,690 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 308 transitions, 2649 flow [2022-12-13 19:56:06,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 19:56:06,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 19:56:06,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2679 transitions. [2022-12-13 19:56:06,697 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.33395661929693343 [2022-12-13 19:56:06,697 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2679 transitions. [2022-12-13 19:56:06,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2679 transitions. [2022-12-13 19:56:06,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:56:06,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2679 transitions. [2022-12-13 19:56:06,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 191.35714285714286) internal successors, (2679), 14 states have internal predecessors, (2679), 0 states have call successors, (0), 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 19:56:06,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 573.0) internal successors, (8595), 15 states have internal predecessors, (8595), 0 states have call successors, (0), 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 19:56:06,707 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 573.0) internal successors, (8595), 15 states have internal predecessors, (8595), 0 states have call successors, (0), 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 19:56:06,707 INFO L175 Difference]: Start difference. First operand has 113 places, 121 transitions, 841 flow. Second operand 14 states and 2679 transitions. [2022-12-13 19:56:06,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 308 transitions, 2649 flow [2022-12-13 19:56:06,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 308 transitions, 2635 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:56:06,724 INFO L231 Difference]: Finished difference. Result has 130 places, 163 transitions, 1515 flow [2022-12-13 19:56:06,725 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1515, PETRI_PLACES=130, PETRI_TRANSITIONS=163} [2022-12-13 19:56:06,725 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 61 predicate places. [2022-12-13 19:56:06,725 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 163 transitions, 1515 flow [2022-12-13 19:56:06,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 183.2) internal successors, (1832), 10 states have internal predecessors, (1832), 0 states have call successors, (0), 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 19:56:06,726 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:56:06,726 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:56:06,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 (17)] Forceful destruction successful, exit code 0 [2022-12-13 19:56:06,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:56:06,927 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 19:56:06,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:56:06,929 INFO L85 PathProgramCache]: Analyzing trace with hash -640244201, now seen corresponding path program 1 times [2022-12-13 19:56:06,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:56:06,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [531304154] [2022-12-13 19:56:06,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:56:06,931 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 19:56:06,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:56:06,935 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:56:06,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 (18)] Waiting until timeout for monitored process [2022-12-13 19:56:07,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:56:07,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 19:56:07,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:56:07,075 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 19:56:07,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:56:07,075 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:56:07,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [531304154] [2022-12-13 19:56:07,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [531304154] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:56:07,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:56:07,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:56:07,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628532143] [2022-12-13 19:56:07,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:56:07,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:56:07,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:56:07,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:56:07,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:56:07,084 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 573 [2022-12-13 19:56:07,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 163 transitions, 1515 flow. Second operand has 3 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 0 states have call successors, (0), 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 19:56:07,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:56:07,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 573 [2022-12-13 19:56:07,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:56:20,781 INFO L130 PetriNetUnfolder]: 61241/89058 cut-off events. [2022-12-13 19:56:20,781 INFO L131 PetriNetUnfolder]: For 40919/40919 co-relation queries the response was YES. [2022-12-13 19:56:21,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225621 conditions, 89058 events. 61241/89058 cut-off events. For 40919/40919 co-relation queries the response was YES. Maximal size of possible extension queue 2369. Compared 617536 event pairs, 22056 based on Foata normal form. 2664/69570 useless extension candidates. Maximal degree in co-relation 225565. Up to 78481 conditions per place. [2022-12-13 19:56:21,541 INFO L137 encePairwiseOnDemand]: 568/573 looper letters, 183 selfloop transitions, 2 changer transitions 2/187 dead transitions. [2022-12-13 19:56:21,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 187 transitions, 1974 flow [2022-12-13 19:56:21,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:56:21,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:56:21,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 773 transitions. [2022-12-13 19:56:21,544 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44968004653868526 [2022-12-13 19:56:21,544 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 773 transitions. [2022-12-13 19:56:21,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 773 transitions. [2022-12-13 19:56:21,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:56:21,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 773 transitions. [2022-12-13 19:56:21,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 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 19:56:21,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 573.0) internal successors, (2292), 4 states have internal predecessors, (2292), 0 states have call successors, (0), 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 19:56:21,547 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 573.0) internal successors, (2292), 4 states have internal predecessors, (2292), 0 states have call successors, (0), 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 19:56:21,547 INFO L175 Difference]: Start difference. First operand has 130 places, 163 transitions, 1515 flow. Second operand 3 states and 773 transitions. [2022-12-13 19:56:21,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 187 transitions, 1974 flow [2022-12-13 19:56:21,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 187 transitions, 1959 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 19:56:21,597 INFO L231 Difference]: Finished difference. Result has 132 places, 164 transitions, 1516 flow [2022-12-13 19:56:21,597 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=1500, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1516, PETRI_PLACES=132, PETRI_TRANSITIONS=164} [2022-12-13 19:56:21,598 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 63 predicate places. [2022-12-13 19:56:21,598 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 164 transitions, 1516 flow [2022-12-13 19:56:21,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 0 states have call successors, (0), 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 19:56:21,598 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:56:21,598 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:56:21,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 (18)] Ended with exit code 0 [2022-12-13 19:56:21,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:56:21,799 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 19:56:21,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:56:21,801 INFO L85 PathProgramCache]: Analyzing trace with hash -640243986, now seen corresponding path program 1 times [2022-12-13 19:56:21,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:56:21,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [115091670] [2022-12-13 19:56:21,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:56:21,803 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 19:56:21,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:56:21,805 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:56:21,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 (19)] Waiting until timeout for monitored process [2022-12-13 19:56:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:56:22,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 19:56:22,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:56:22,075 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 19:56:22,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:56:22,075 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:56:22,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [115091670] [2022-12-13 19:56:22,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [115091670] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:56:22,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:56:22,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:56:22,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858375753] [2022-12-13 19:56:22,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:56:22,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:56:22,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:56:22,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:56:22,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:56:22,294 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 573 [2022-12-13 19:56:22,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 164 transitions, 1516 flow. Second operand has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 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 19:56:22,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:56:22,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 573 [2022-12-13 19:56:22,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:56:35,554 INFO L130 PetriNetUnfolder]: 56389/82140 cut-off events. [2022-12-13 19:56:35,554 INFO L131 PetriNetUnfolder]: For 41786/41786 co-relation queries the response was YES. [2022-12-13 19:56:36,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222240 conditions, 82140 events. 56389/82140 cut-off events. For 41786/41786 co-relation queries the response was YES. Maximal size of possible extension queue 2325. Compared 582146 event pairs, 46488 based on Foata normal form. 12/61846 useless extension candidates. Maximal degree in co-relation 222182. Up to 81475 conditions per place. [2022-12-13 19:56:36,361 INFO L137 encePairwiseOnDemand]: 566/573 looper letters, 136 selfloop transitions, 43 changer transitions 5/184 dead transitions. [2022-12-13 19:56:36,362 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 184 transitions, 1961 flow [2022-12-13 19:56:36,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:56:36,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:56:36,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1183 transitions. [2022-12-13 19:56:36,364 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41291448516579404 [2022-12-13 19:56:36,364 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1183 transitions. [2022-12-13 19:56:36,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1183 transitions. [2022-12-13 19:56:36,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:56:36,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1183 transitions. [2022-12-13 19:56:36,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 236.6) internal successors, (1183), 5 states have internal predecessors, (1183), 0 states have call successors, (0), 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 19:56:36,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 573.0) internal successors, (3438), 6 states have internal predecessors, (3438), 0 states have call successors, (0), 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 19:56:36,368 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 573.0) internal successors, (3438), 6 states have internal predecessors, (3438), 0 states have call successors, (0), 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 19:56:36,369 INFO L175 Difference]: Start difference. First operand has 132 places, 164 transitions, 1516 flow. Second operand 5 states and 1183 transitions. [2022-12-13 19:56:36,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 184 transitions, 1961 flow [2022-12-13 19:56:36,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 184 transitions, 1959 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:56:36,432 INFO L231 Difference]: Finished difference. Result has 137 places, 164 transitions, 1657 flow [2022-12-13 19:56:36,433 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=1514, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1657, PETRI_PLACES=137, PETRI_TRANSITIONS=164} [2022-12-13 19:56:36,433 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 68 predicate places. [2022-12-13 19:56:36,433 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 164 transitions, 1657 flow [2022-12-13 19:56:36,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 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 19:56:36,433 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:56:36,433 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 1, 1] [2022-12-13 19:56:36,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 (19)] Forceful destruction successful, exit code 0 [2022-12-13 19:56:36,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:56:36,635 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 19:56:36,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:56:36,636 INFO L85 PathProgramCache]: Analyzing trace with hash -618385541, now seen corresponding path program 3 times [2022-12-13 19:56:36,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:56:36,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669452998] [2022-12-13 19:56:36,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:56:36,637 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 19:56:36,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:56:36,640 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:56:36,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 (20)] Waiting until timeout for monitored process [2022-12-13 19:56:36,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-13 19:56:36,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:56:36,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 19:56:36,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:56:37,036 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:56:37,036 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 19:56:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:56:37,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:56:41,668 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:56:41,668 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:56:41,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669452998] [2022-12-13 19:56:41,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669452998] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:56:41,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:56:41,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2022-12-13 19:56:41,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961083596] [2022-12-13 19:56:41,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:56:41,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 19:56:41,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:56:41,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 19:56:41,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2022-12-13 19:57:20,237 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 573 [2022-12-13 19:57:20,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 164 transitions, 1657 flow. Second operand has 26 states, 26 states have (on average 211.0) internal successors, (5486), 26 states have internal predecessors, (5486), 0 states have call successors, (0), 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 19:57:20,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:57:20,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 573 [2022-12-13 19:57:20,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:57:36,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:57:38,447 WARN L539 Checker$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 19:57:40,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:57:42,453 WARN L539 Checker$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 19:57:44,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:57:46,446 WARN L539 Checker$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 19:57:48,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:57:50,428 WARN L539 Checker$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 19:57:52,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:57:54,478 WARN L539 Checker$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 19:57:56,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:58:03,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:58:05,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:58:07,361 WARN L539 Checker$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 19:58:09,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:58:11,367 WARN L539 Checker$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 19:58:13,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:58:15,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:58:17,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:58:19,294 WARN L539 Checker$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 19:58:21,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:58:23,301 WARN L539 Checker$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 19:58:55,029 INFO L130 PetriNetUnfolder]: 66439/96665 cut-off events. [2022-12-13 19:58:55,029 INFO L131 PetriNetUnfolder]: For 57236/57236 co-relation queries the response was YES. [2022-12-13 19:58:55,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266322 conditions, 96665 events. 66439/96665 cut-off events. For 57236/57236 co-relation queries the response was YES. Maximal size of possible extension queue 2416. Compared 692111 event pairs, 54737 based on Foata normal form. 25/75084 useless extension candidates. Maximal degree in co-relation 266261. Up to 18132 conditions per place. [2022-12-13 19:58:55,906 INFO L137 encePairwiseOnDemand]: 564/573 looper letters, 565 selfloop transitions, 123 changer transitions 3/691 dead transitions. [2022-12-13 19:58:55,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 691 transitions, 5408 flow [2022-12-13 19:58:55,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 19:58:55,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 19:58:55,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 6065 transitions. [2022-12-13 19:58:55,914 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4071016243791113 [2022-12-13 19:58:55,914 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 6065 transitions. [2022-12-13 19:58:55,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 6065 transitions. [2022-12-13 19:58:55,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:58:55,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 6065 transitions. [2022-12-13 19:58:55,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 233.26923076923077) internal successors, (6065), 26 states have internal predecessors, (6065), 0 states have call successors, (0), 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 19:58:55,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 573.0) internal successors, (15471), 27 states have internal predecessors, (15471), 0 states have call successors, (0), 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 19:58:55,931 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 573.0) internal successors, (15471), 27 states have internal predecessors, (15471), 0 states have call successors, (0), 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 19:58:55,931 INFO L175 Difference]: Start difference. First operand has 137 places, 164 transitions, 1657 flow. Second operand 26 states and 6065 transitions. [2022-12-13 19:58:55,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 691 transitions, 5408 flow [2022-12-13 19:58:56,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 691 transitions, 5357 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-12-13 19:58:56,073 INFO L231 Difference]: Finished difference. Result has 174 places, 196 transitions, 2302 flow [2022-12-13 19:58:56,073 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=1606, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2302, PETRI_PLACES=174, PETRI_TRANSITIONS=196} [2022-12-13 19:58:56,073 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 105 predicate places. [2022-12-13 19:58:56,073 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 196 transitions, 2302 flow [2022-12-13 19:58:56,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 211.0) internal successors, (5486), 26 states have internal predecessors, (5486), 0 states have call successors, (0), 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 19:58:56,074 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:58:56,074 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:58:56,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 (20)] Ended with exit code 0 [2022-12-13 19:58:56,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:58:56,275 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 19:58:56,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:58:56,275 INFO L85 PathProgramCache]: Analyzing trace with hash -798837760, now seen corresponding path program 1 times [2022-12-13 19:58:56,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:58:56,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [736870046] [2022-12-13 19:58:56,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:58:56,275 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:58:56,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:58:56,276 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:58:56,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 (21)] Waiting until timeout for monitored process [2022-12-13 19:58:56,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:58:56,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 19:58:56,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:58:56,434 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 19:58:56,682 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 19:58:56,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:58:57,826 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 19:58:57,826 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:58:57,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [736870046] [2022-12-13 19:58:57,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [736870046] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:58:57,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:58:57,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-12-13 19:58:57,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429054666] [2022-12-13 19:58:57,827 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:58:57,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 19:58:57,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:58:57,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 19:58:57,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-13 19:59:06,621 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 573 [2022-12-13 19:59:06,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 196 transitions, 2302 flow. Second operand has 8 states, 8 states have (on average 205.875) internal successors, (1647), 8 states have internal predecessors, (1647), 0 states have call successors, (0), 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 19:59:06,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:59:06,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 573 [2022-12-13 19:59:06,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:59:30,342 INFO L130 PetriNetUnfolder]: 62704/91364 cut-off events. [2022-12-13 19:59:30,342 INFO L131 PetriNetUnfolder]: For 54305/54305 co-relation queries the response was YES. [2022-12-13 19:59:31,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251447 conditions, 91364 events. 62704/91364 cut-off events. For 54305/54305 co-relation queries the response was YES. Maximal size of possible extension queue 2271. Compared 647582 event pairs, 51464 based on Foata normal form. 0/72188 useless extension candidates. Maximal degree in co-relation 251372. Up to 74174 conditions per place. [2022-12-13 19:59:31,341 INFO L137 encePairwiseOnDemand]: 562/573 looper letters, 197 selfloop transitions, 89 changer transitions 3/289 dead transitions. [2022-12-13 19:59:31,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 289 transitions, 3239 flow [2022-12-13 19:59:31,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 19:59:31,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 19:59:31,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2378 transitions. [2022-12-13 19:59:31,346 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3772806600031731 [2022-12-13 19:59:31,346 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2378 transitions. [2022-12-13 19:59:31,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2378 transitions. [2022-12-13 19:59:31,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:59:31,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2378 transitions. [2022-12-13 19:59:31,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 216.1818181818182) internal successors, (2378), 11 states have internal predecessors, (2378), 0 states have call successors, (0), 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 19:59:31,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 573.0) internal successors, (6876), 12 states have internal predecessors, (6876), 0 states have call successors, (0), 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 19:59:31,352 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 573.0) internal successors, (6876), 12 states have internal predecessors, (6876), 0 states have call successors, (0), 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 19:59:31,352 INFO L175 Difference]: Start difference. First operand has 174 places, 196 transitions, 2302 flow. Second operand 11 states and 2378 transitions. [2022-12-13 19:59:31,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 289 transitions, 3239 flow [2022-12-13 19:59:31,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 289 transitions, 2971 flow, removed 51 selfloop flow, removed 11 redundant places. [2022-12-13 19:59:31,445 INFO L231 Difference]: Finished difference. Result has 175 places, 199 transitions, 2263 flow [2022-12-13 19:59:31,445 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=2034, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2263, PETRI_PLACES=175, PETRI_TRANSITIONS=199} [2022-12-13 19:59:31,445 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 106 predicate places. [2022-12-13 19:59:31,446 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 199 transitions, 2263 flow [2022-12-13 19:59:31,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 205.875) internal successors, (1647), 8 states have internal predecessors, (1647), 0 states have call successors, (0), 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 19:59:31,446 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:59:31,446 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:59:31,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 (21)] Ended with exit code 0 [2022-12-13 19:59:31,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:59:31,647 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 19:59:31,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:59:31,649 INFO L85 PathProgramCache]: Analyzing trace with hash -798837759, now seen corresponding path program 1 times [2022-12-13 19:59:31,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:59:31,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134778942] [2022-12-13 19:59:31,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:59:31,650 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 19:59:31,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:59:31,653 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:59:31,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 (22)] Waiting until timeout for monitored process [2022-12-13 19:59:31,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:59:31,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 19:59:31,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:59:31,801 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 19:59:31,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 19:59:31,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:59:31,832 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:59:31,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134778942] [2022-12-13 19:59:31,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134778942] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:59:31,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:59:31,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:59:31,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066489605] [2022-12-13 19:59:31,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:59:31,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:59:31,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:59:31,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:59:31,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:59:32,056 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 573 [2022-12-13 19:59:32,056 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 199 transitions, 2263 flow. Second operand has 4 states, 4 states have (on average 223.25) internal successors, (893), 4 states have internal predecessors, (893), 0 states have call successors, (0), 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 19:59:32,056 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:59:32,056 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 573 [2022-12-13 19:59:32,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:59:44,131 INFO L130 PetriNetUnfolder]: 46999/69065 cut-off events. [2022-12-13 19:59:44,131 INFO L131 PetriNetUnfolder]: For 78866/78866 co-relation queries the response was YES. [2022-12-13 19:59:44,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197146 conditions, 69065 events. 46999/69065 cut-off events. For 78866/78866 co-relation queries the response was YES. Maximal size of possible extension queue 1760. Compared 478317 event pairs, 37725 based on Foata normal form. 6178/64863 useless extension candidates. Maximal degree in co-relation 197068. Up to 68793 conditions per place. [2022-12-13 19:59:44,852 INFO L137 encePairwiseOnDemand]: 569/573 looper letters, 171 selfloop transitions, 26 changer transitions 0/197 dead transitions. [2022-12-13 19:59:44,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 197 transitions, 2647 flow [2022-12-13 19:59:44,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:59:44,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:59:44,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 925 transitions. [2022-12-13 19:59:44,854 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40357766143106455 [2022-12-13 19:59:44,855 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 925 transitions. [2022-12-13 19:59:44,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 925 transitions. [2022-12-13 19:59:44,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:59:44,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 925 transitions. [2022-12-13 19:59:44,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 231.25) internal successors, (925), 4 states have internal predecessors, (925), 0 states have call successors, (0), 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 19:59:44,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 573.0) internal successors, (2865), 5 states have internal predecessors, (2865), 0 states have call successors, (0), 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 19:59:44,857 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 573.0) internal successors, (2865), 5 states have internal predecessors, (2865), 0 states have call successors, (0), 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 19:59:44,858 INFO L175 Difference]: Start difference. First operand has 175 places, 199 transitions, 2263 flow. Second operand 4 states and 925 transitions. [2022-12-13 19:59:44,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 197 transitions, 2647 flow [2022-12-13 19:59:44,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 197 transitions, 2442 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-12-13 19:59:44,981 INFO L231 Difference]: Finished difference. Result has 171 places, 197 transitions, 2100 flow [2022-12-13 19:59:44,981 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=2048, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2100, PETRI_PLACES=171, PETRI_TRANSITIONS=197} [2022-12-13 19:59:44,981 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 102 predicate places. [2022-12-13 19:59:44,981 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 197 transitions, 2100 flow [2022-12-13 19:59:44,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 223.25) internal successors, (893), 4 states have internal predecessors, (893), 0 states have call successors, (0), 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 19:59:44,982 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:59:44,982 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:59:44,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 (22)] Ended with exit code 0 [2022-12-13 19:59:45,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:59:45,183 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 19:59:45,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:59:45,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1808969559, now seen corresponding path program 2 times [2022-12-13 19:59:45,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:59:45,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1272861630] [2022-12-13 19:59:45,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:59:45,186 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 19:59:45,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:59:45,189 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 19:59:45,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 (23)] Waiting until timeout for monitored process [2022-12-13 19:59:45,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 19:59:45,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:59:45,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 19:59:45,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:59:45,568 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 19:59:45,568 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 19:59:45,726 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 19:59:45,727 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 19:59:45,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:59:45,854 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 19:59:45,886 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 19:59:45,886 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 19:59:45,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:59:45,944 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 16 treesize of output 18 [2022-12-13 19:59:45,964 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 19:59:45,964 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 19:59:46,284 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 19:59:46,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:59:46,284 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:59:46,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1272861630] [2022-12-13 19:59:46,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1272861630] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:59:46,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:59:46,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:59:46,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862599259] [2022-12-13 19:59:46,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:59:46,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 19:59:46,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:59:46,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 19:59:46,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:59:48,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:59:49,830 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 573 [2022-12-13 19:59:49,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 197 transitions, 2100 flow. Second operand has 6 states, 6 states have (on average 206.83333333333334) internal successors, (1241), 6 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:59:49,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:59:49,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 573 [2022-12-13 19:59:49,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:59:51,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:59:54,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:59:56,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:00:06,375 INFO L130 PetriNetUnfolder]: 37122/54962 cut-off events. [2022-12-13 20:00:06,375 INFO L131 PetriNetUnfolder]: For 60576/60576 co-relation queries the response was YES. [2022-12-13 20:00:06,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150363 conditions, 54962 events. 37122/54962 cut-off events. For 60576/60576 co-relation queries the response was YES. Maximal size of possible extension queue 1379. Compared 375415 event pairs, 29144 based on Foata normal form. 3464/49558 useless extension candidates. Maximal degree in co-relation 150286. Up to 54713 conditions per place. [2022-12-13 20:00:06,890 INFO L137 encePairwiseOnDemand]: 563/573 looper letters, 124 selfloop transitions, 68 changer transitions 17/209 dead transitions. [2022-12-13 20:00:06,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 209 transitions, 2534 flow [2022-12-13 20:00:06,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 20:00:06,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 20:00:06,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1295 transitions. [2022-12-13 20:00:06,893 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37667248400232695 [2022-12-13 20:00:06,893 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1295 transitions. [2022-12-13 20:00:06,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1295 transitions. [2022-12-13 20:00:06,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:00:06,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1295 transitions. [2022-12-13 20:00:06,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 215.83333333333334) internal successors, (1295), 6 states have internal predecessors, (1295), 0 states have call successors, (0), 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 20:00:06,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 573.0) internal successors, (4011), 7 states have internal predecessors, (4011), 0 states have call successors, (0), 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 20:00:06,897 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 573.0) internal successors, (4011), 7 states have internal predecessors, (4011), 0 states have call successors, (0), 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 20:00:06,897 INFO L175 Difference]: Start difference. First operand has 171 places, 197 transitions, 2100 flow. Second operand 6 states and 1295 transitions. [2022-12-13 20:00:06,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 209 transitions, 2534 flow [2022-12-13 20:00:06,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 209 transitions, 2499 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 20:00:06,950 INFO L231 Difference]: Finished difference. Result has 169 places, 192 transitions, 2164 flow [2022-12-13 20:00:06,951 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=2037, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2164, PETRI_PLACES=169, PETRI_TRANSITIONS=192} [2022-12-13 20:00:06,951 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 100 predicate places. [2022-12-13 20:00:06,951 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 192 transitions, 2164 flow [2022-12-13 20:00:06,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 206.83333333333334) internal successors, (1241), 6 states have internal predecessors, (1241), 0 states have call successors, (0), 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 20:00:06,951 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:00:06,951 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:00:06,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 (23)] Forceful destruction successful, exit code 0 [2022-12-13 20:00:07,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 20:00:07,153 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 20:00:07,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:00:07,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1116091163, now seen corresponding path program 1 times [2022-12-13 20:00:07,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:00:07,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1236044441] [2022-12-13 20:00:07,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:00:07,155 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 20:00:07,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:00:07,158 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 20:00:07,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 (24)] Waiting until timeout for monitored process [2022-12-13 20:00:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:00:07,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 20:00:07,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:00:07,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 25 [2022-12-13 20:00:07,602 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 9 treesize of output 7 [2022-12-13 20:00:07,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:00:07,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:00:07,708 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:00:07,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1236044441] [2022-12-13 20:00:07,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1236044441] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:00:07,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:00:07,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:00:07,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902091594] [2022-12-13 20:00:07,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:00:07,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:00:07,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:00:07,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:00:07,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:00:07,834 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 573 [2022-12-13 20:00:07,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 192 transitions, 2164 flow. Second operand has 5 states, 5 states have (on average 232.0) internal successors, (1160), 5 states have internal predecessors, (1160), 0 states have call successors, (0), 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 20:00:07,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:00:07,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 573 [2022-12-13 20:00:07,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:00:17,988 INFO L130 PetriNetUnfolder]: 37208/55282 cut-off events. [2022-12-13 20:00:17,988 INFO L131 PetriNetUnfolder]: For 46126/46126 co-relation queries the response was YES. [2022-12-13 20:00:18,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151400 conditions, 55282 events. 37208/55282 cut-off events. For 46126/46126 co-relation queries the response was YES. Maximal size of possible extension queue 1329. Compared 375376 event pairs, 21616 based on Foata normal form. 294/46708 useless extension candidates. Maximal degree in co-relation 151324. Up to 48502 conditions per place. [2022-12-13 20:00:18,557 INFO L137 encePairwiseOnDemand]: 565/573 looper letters, 198 selfloop transitions, 5 changer transitions 12/215 dead transitions. [2022-12-13 20:00:18,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 215 transitions, 2665 flow [2022-12-13 20:00:18,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:00:18,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 20:00:18,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1212 transitions. [2022-12-13 20:00:18,559 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42303664921465967 [2022-12-13 20:00:18,559 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1212 transitions. [2022-12-13 20:00:18,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1212 transitions. [2022-12-13 20:00:18,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:00:18,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1212 transitions. [2022-12-13 20:00:18,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 242.4) internal successors, (1212), 5 states have internal predecessors, (1212), 0 states have call successors, (0), 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 20:00:18,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 573.0) internal successors, (3438), 6 states have internal predecessors, (3438), 0 states have call successors, (0), 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 20:00:18,562 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 573.0) internal successors, (3438), 6 states have internal predecessors, (3438), 0 states have call successors, (0), 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 20:00:18,563 INFO L175 Difference]: Start difference. First operand has 169 places, 192 transitions, 2164 flow. Second operand 5 states and 1212 transitions. [2022-12-13 20:00:18,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 215 transitions, 2665 flow [2022-12-13 20:00:18,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 215 transitions, 2632 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-12-13 20:00:18,656 INFO L231 Difference]: Finished difference. Result has 169 places, 195 transitions, 2175 flow [2022-12-13 20:00:18,656 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=2133, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2175, PETRI_PLACES=169, PETRI_TRANSITIONS=195} [2022-12-13 20:00:18,657 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 100 predicate places. [2022-12-13 20:00:18,657 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 195 transitions, 2175 flow [2022-12-13 20:00:18,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 232.0) internal successors, (1160), 5 states have internal predecessors, (1160), 0 states have call successors, (0), 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 20:00:18,657 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:00:18,657 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:00:18,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 (24)] Ended with exit code 0 [2022-12-13 20:00:18,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 20:00:18,859 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 20:00:18,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:00:18,860 INFO L85 PathProgramCache]: Analyzing trace with hash 586832750, now seen corresponding path program 2 times [2022-12-13 20:00:18,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:00:18,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705458115] [2022-12-13 20:00:18,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:00:18,861 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 20:00:18,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:00:18,864 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 20:00:18,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 (25)] Waiting until timeout for monitored process [2022-12-13 20:00:19,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 20:00:19,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:00:19,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 20:00:19,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:00:19,086 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 20:00:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 20:00:19,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:00:19,227 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:00:19,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705458115] [2022-12-13 20:00:19,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705458115] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:00:19,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:00:19,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:00:19,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099022950] [2022-12-13 20:00:19,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:00:19,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:00:19,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:00:19,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:00:19,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:00:19,438 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 573 [2022-12-13 20:00:19,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 195 transitions, 2175 flow. Second operand has 4 states, 4 states have (on average 224.25) internal successors, (897), 4 states have internal predecessors, (897), 0 states have call successors, (0), 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 20:00:19,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:00:19,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 573 [2022-12-13 20:00:19,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:00:27,507 INFO L130 PetriNetUnfolder]: 27848/41902 cut-off events. [2022-12-13 20:00:27,507 INFO L131 PetriNetUnfolder]: For 49473/49473 co-relation queries the response was YES. [2022-12-13 20:00:27,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115593 conditions, 41902 events. 27848/41902 cut-off events. For 49473/49473 co-relation queries the response was YES. Maximal size of possible extension queue 1001. Compared 279348 event pairs, 21190 based on Foata normal form. 3720/38914 useless extension candidates. Maximal degree in co-relation 115516. Up to 41630 conditions per place. [2022-12-13 20:00:27,860 INFO L137 encePairwiseOnDemand]: 569/573 looper letters, 129 selfloop transitions, 63 changer transitions 0/192 dead transitions. [2022-12-13 20:00:27,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 192 transitions, 2529 flow [2022-12-13 20:00:27,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:00:27,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 20:00:27,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 923 transitions. [2022-12-13 20:00:27,863 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4027050610820244 [2022-12-13 20:00:27,863 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 923 transitions. [2022-12-13 20:00:27,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 923 transitions. [2022-12-13 20:00:27,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:00:27,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 923 transitions. [2022-12-13 20:00:27,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 230.75) internal successors, (923), 4 states have internal predecessors, (923), 0 states have call successors, (0), 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 20:00:27,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 573.0) internal successors, (2865), 5 states have internal predecessors, (2865), 0 states have call successors, (0), 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 20:00:27,865 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 573.0) internal successors, (2865), 5 states have internal predecessors, (2865), 0 states have call successors, (0), 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 20:00:27,865 INFO L175 Difference]: Start difference. First operand has 169 places, 195 transitions, 2175 flow. Second operand 4 states and 923 transitions. [2022-12-13 20:00:27,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 192 transitions, 2529 flow [2022-12-13 20:00:27,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 192 transitions, 2511 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-12-13 20:00:27,901 INFO L231 Difference]: Finished difference. Result has 166 places, 192 transitions, 2253 flow [2022-12-13 20:00:27,901 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=2127, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2253, PETRI_PLACES=166, PETRI_TRANSITIONS=192} [2022-12-13 20:00:27,902 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 97 predicate places. [2022-12-13 20:00:27,902 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 192 transitions, 2253 flow [2022-12-13 20:00:27,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 224.25) internal successors, (897), 4 states have internal predecessors, (897), 0 states have call successors, (0), 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 20:00:27,902 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:00:27,902 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:00:27,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 (25)] Forceful destruction successful, exit code 0 [2022-12-13 20:00:28,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 20:00:28,104 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 20:00:28,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:00:28,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1178051572, now seen corresponding path program 1 times [2022-12-13 20:00:28,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:00:28,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810888205] [2022-12-13 20:00:28,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:00:28,105 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 20:00:28,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:00:28,106 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 20:00:28,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 (26)] Waiting until timeout for monitored process [2022-12-13 20:00:28,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:00:28,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 20:00:28,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:00:28,645 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 20:00:28,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:00:29,026 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 20:00:29,026 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:00:29,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810888205] [2022-12-13 20:00:29,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810888205] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:00:29,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:00:29,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-12-13 20:00:29,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874572917] [2022-12-13 20:00:29,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:00:29,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 20:00:29,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:00:29,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 20:00:29,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-13 20:00:29,960 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 573 [2022-12-13 20:00:29,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 192 transitions, 2253 flow. Second operand has 10 states, 10 states have (on average 218.3) internal successors, (2183), 10 states have internal predecessors, (2183), 0 states have call successors, (0), 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 20:00:29,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:00:29,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 573 [2022-12-13 20:00:29,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:00:36,682 INFO L130 PetriNetUnfolder]: 19619/30085 cut-off events. [2022-12-13 20:00:36,682 INFO L131 PetriNetUnfolder]: For 18477/18477 co-relation queries the response was YES. [2022-12-13 20:00:36,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82739 conditions, 30085 events. 19619/30085 cut-off events. For 18477/18477 co-relation queries the response was YES. Maximal size of possible extension queue 712. Compared 195372 event pairs, 14768 based on Foata normal form. 26/25639 useless extension candidates. Maximal degree in co-relation 82665. Up to 27068 conditions per place. [2022-12-13 20:00:36,968 INFO L137 encePairwiseOnDemand]: 564/573 looper letters, 241 selfloop transitions, 26 changer transitions 55/322 dead transitions. [2022-12-13 20:00:36,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 322 transitions, 3973 flow [2022-12-13 20:00:36,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 20:00:36,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 20:00:36,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2028 transitions. [2022-12-13 20:00:36,972 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3932518906340896 [2022-12-13 20:00:36,972 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2028 transitions. [2022-12-13 20:00:36,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2028 transitions. [2022-12-13 20:00:36,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:00:36,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2028 transitions. [2022-12-13 20:00:36,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 225.33333333333334) internal successors, (2028), 9 states have internal predecessors, (2028), 0 states have call successors, (0), 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 20:00:36,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 573.0) internal successors, (5730), 10 states have internal predecessors, (5730), 0 states have call successors, (0), 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 20:00:36,977 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 573.0) internal successors, (5730), 10 states have internal predecessors, (5730), 0 states have call successors, (0), 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 20:00:36,977 INFO L175 Difference]: Start difference. First operand has 166 places, 192 transitions, 2253 flow. Second operand 9 states and 2028 transitions. [2022-12-13 20:00:36,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 322 transitions, 3973 flow [2022-12-13 20:00:37,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 322 transitions, 3827 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 20:00:37,019 INFO L231 Difference]: Finished difference. Result has 175 places, 186 transitions, 2199 flow [2022-12-13 20:00:37,019 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=2151, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2199, PETRI_PLACES=175, PETRI_TRANSITIONS=186} [2022-12-13 20:00:37,019 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 106 predicate places. [2022-12-13 20:00:37,019 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 186 transitions, 2199 flow [2022-12-13 20:00:37,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 218.3) internal successors, (2183), 10 states have internal predecessors, (2183), 0 states have call successors, (0), 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 20:00:37,020 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:00:37,020 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:00:37,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 (26)] Forceful destruction successful, exit code 0 [2022-12-13 20:00:37,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 20:00:37,221 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 20:00:37,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:00:37,222 INFO L85 PathProgramCache]: Analyzing trace with hash 452373082, now seen corresponding path program 2 times [2022-12-13 20:00:37,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:00:37,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2029261626] [2022-12-13 20:00:37,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:00:37,224 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 20:00:37,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:00:37,226 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 20:00:37,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 (27)] Waiting until timeout for monitored process [2022-12-13 20:00:37,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 20:00:37,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:00:37,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 20:00:37,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:00:37,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 20:00:37,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:00:37,546 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:00:37,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2029261626] [2022-12-13 20:00:37,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2029261626] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:00:37,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:00:37,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:00:37,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292930558] [2022-12-13 20:00:37,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:00:37,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:00:37,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:00:37,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:00:37,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:00:37,808 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 573 [2022-12-13 20:00:37,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 186 transitions, 2199 flow. Second operand has 4 states, 4 states have (on average 227.25) internal successors, (909), 4 states have internal predecessors, (909), 0 states have call successors, (0), 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 20:00:37,809 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:00:37,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 573 [2022-12-13 20:00:37,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:00:43,658 INFO L130 PetriNetUnfolder]: 20360/31514 cut-off events. [2022-12-13 20:00:43,658 INFO L131 PetriNetUnfolder]: For 22822/22822 co-relation queries the response was YES. [2022-12-13 20:00:43,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88008 conditions, 31514 events. 20360/31514 cut-off events. For 22822/22822 co-relation queries the response was YES. Maximal size of possible extension queue 786. Compared 210050 event pairs, 15782 based on Foata normal form. 156/27198 useless extension candidates. Maximal degree in co-relation 87930. Up to 27285 conditions per place. [2022-12-13 20:00:43,957 INFO L137 encePairwiseOnDemand]: 566/573 looper letters, 175 selfloop transitions, 31 changer transitions 37/243 dead transitions. [2022-12-13 20:00:43,957 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 243 transitions, 3288 flow [2022-12-13 20:00:43,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:00:43,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 20:00:43,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 957 transitions. [2022-12-13 20:00:43,959 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4175392670157068 [2022-12-13 20:00:43,959 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 957 transitions. [2022-12-13 20:00:43,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 957 transitions. [2022-12-13 20:00:43,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:00:43,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 957 transitions. [2022-12-13 20:00:43,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 239.25) internal successors, (957), 4 states have internal predecessors, (957), 0 states have call successors, (0), 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 20:00:43,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 573.0) internal successors, (2865), 5 states have internal predecessors, (2865), 0 states have call successors, (0), 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 20:00:43,962 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 573.0) internal successors, (2865), 5 states have internal predecessors, (2865), 0 states have call successors, (0), 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 20:00:43,962 INFO L175 Difference]: Start difference. First operand has 175 places, 186 transitions, 2199 flow. Second operand 4 states and 957 transitions. [2022-12-13 20:00:43,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 243 transitions, 3288 flow [2022-12-13 20:00:44,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 243 transitions, 3268 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-12-13 20:00:44,068 INFO L231 Difference]: Finished difference. Result has 173 places, 186 transitions, 2281 flow [2022-12-13 20:00:44,068 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=573, PETRI_DIFFERENCE_MINUEND_FLOW=2185, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2281, PETRI_PLACES=173, PETRI_TRANSITIONS=186} [2022-12-13 20:00:44,069 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, 104 predicate places. [2022-12-13 20:00:44,069 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 186 transitions, 2281 flow [2022-12-13 20:00:44,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 227.25) internal successors, (909), 4 states have internal predecessors, (909), 0 states have call successors, (0), 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 20:00:44,069 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:00:44,069 INFO L209 CegarLoopForPetriNet]: trace histogram [14, 1, 1, 1, 1] [2022-12-13 20:00:44,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 (27)] Ended with exit code 0 [2022-12-13 20:00:44,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 20:00:44,270 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-12-13 20:00:44,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:00:44,271 INFO L85 PathProgramCache]: Analyzing trace with hash -640417963, now seen corresponding path program 1 times [2022-12-13 20:00:44,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:00:44,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1101662819] [2022-12-13 20:00:44,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:00:44,273 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 20:00:44,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:00:44,276 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 20:00:44,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_894b2db0-6b62-45de-b16a-07c1d8ef27e3/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 (28)] Waiting until timeout for monitored process [2022-12-13 20:00:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:00:44,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 20:00:44,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:00:44,453 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 20:00:45,419 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:00:45,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:00:51,200 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:00:51,200 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:00:51,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1101662819] [2022-12-13 20:00:51,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1101662819] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:00:51,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:00:51,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2022-12-13 20:00:51,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738858634] [2022-12-13 20:00:51,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:00:51,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 20:00:51,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:00:51,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 20:00:51,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2022-12-13 20:01:50,383 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 573 [2022-12-13 20:01:50,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 186 transitions, 2281 flow. Second operand has 32 states, 32 states have (on average 211.0625) internal successors, (6754), 32 states have internal predecessors, (6754), 0 states have call successors, (0), 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 20:01:50,387 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:01:50,387 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 573 [2022-12-13 20:01:50,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:02:04,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:02:06,405 WARN L539 Checker$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 20:02:08,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:02:10,411 WARN L539 Checker$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 20:02:12,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:02:14,417 WARN L539 Checker$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 20:02:16,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:02:18,423 WARN L539 Checker$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 20:02:20,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:02:22,429 WARN L539 Checker$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 20:02:24,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:02:26,016 WARN L539 Checker$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 20:02:28,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:02:30,022 WARN L539 Checker$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 20:02:32,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:02:34,102 WARN L539 Checker$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 20:02:36,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:02:38,109 WARN L539 Checker$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 20:02:40,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:02:42,116 WARN L539 Checker$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 20:02:44,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:02:46,122 WARN L539 Checker$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 20:02:48,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:02:50,128 WARN L539 Checker$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 20:02:51,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:02:53,646 WARN L539 Checker$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 20:02:55,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:02:57,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []