./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-max-array.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_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 a87860dbf851812846995aa918799e2b576306268e8c461660702f868d3b2804 --- 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 11:35:50,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:35:50,229 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:35:50,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:35:50,247 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:35:50,248 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:35:50,249 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:35:50,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:35:50,252 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:35:50,253 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:35:50,254 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:35:50,255 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:35:50,255 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:35:50,256 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:35:50,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:35:50,258 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:35:50,259 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:35:50,260 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:35:50,261 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:35:50,263 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:35:50,264 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:35:50,266 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:35:50,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:35:50,267 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:35:50,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:35:50,271 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:35:50,271 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:35:50,272 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:35:50,272 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:35:50,273 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:35:50,273 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:35:50,274 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:35:50,275 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:35:50,275 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:35:50,276 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:35:50,276 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:35:50,277 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:35:50,277 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:35:50,277 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:35:50,278 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:35:50,279 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:35:50,279 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 11:35:50,298 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:35:50,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:35:50,298 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:35:50,299 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:35:50,299 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:35:50,304 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:35:50,305 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:35:50,305 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:35:50,305 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:35:50,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:35:50,306 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:35:50,306 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 11:35:50,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:35:50,306 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:35:50,307 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:35:50,307 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 11:35:50,307 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 11:35:50,307 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 11:35:50,307 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:35:50,307 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 11:35:50,308 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:35:50,308 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:35:50,308 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:35:50,308 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:35:50,308 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:35:50,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:35:50,309 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:35:50,309 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:35:50,309 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 11:35:50,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 11:35:50,310 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:35:50,310 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:35:50,310 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:35:50,310 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:35:50,310 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_1f535f8a-b674-4ea6-a2cf-1752103d1344/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a87860dbf851812846995aa918799e2b576306268e8c461660702f868d3b2804 [2022-12-13 11:35:50,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:35:50,501 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:35:50,503 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:35:50,504 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:35:50,504 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:35:50,505 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c [2022-12-13 11:35:53,116 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:35:53,238 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:35:53,238 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c [2022-12-13 11:35:53,243 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/data/8aef07dd9/01460fb75a0a4c7295197ff6309c17bc/FLAG78b0c9592 [2022-12-13 11:35:53,253 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/data/8aef07dd9/01460fb75a0a4c7295197ff6309c17bc [2022-12-13 11:35:53,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:35:53,256 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:35:53,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:35:53,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:35:53,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:35:53,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:35:53" (1/1) ... [2022-12-13 11:35:53,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e663dfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:35:53, skipping insertion in model container [2022-12-13 11:35:53,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:35:53" (1/1) ... [2022-12-13 11:35:53,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:35:53,286 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:35:53,396 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:35:53,397 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:35:53,400 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:35:53,401 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:35:53,402 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:35:53,403 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:35:53,408 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_1f535f8a-b674-4ea6-a2cf-1752103d1344/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c[2553,2566] [2022-12-13 11:35:53,415 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:35:53,423 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 11:35:53,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@68842d13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:35:53, skipping insertion in model container [2022-12-13 11:35:53,423 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:35:53,424 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 11:35:53,425 INFO L158 Benchmark]: Toolchain (without parser) took 168.02ms. Allocated memory is still 134.2MB. Free memory was 94.5MB in the beginning and 84.4MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 11:35:53,425 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 134.2MB. Free memory is still 104.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 11:35:53,426 INFO L158 Benchmark]: CACSL2BoogieTranslator took 166.35ms. Allocated memory is still 134.2MB. Free memory was 94.5MB in the beginning and 84.4MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 11:35:53,427 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 134.2MB. Free memory is still 104.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 166.35ms. Allocated memory is still 134.2MB. Free memory was 94.5MB in the beginning and 84.4MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 109]: 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_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 a87860dbf851812846995aa918799e2b576306268e8c461660702f868d3b2804 --- 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 11:35:54,842 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:35:54,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:35:54,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:35:54,857 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:35:54,857 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:35:54,858 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:35:54,859 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:35:54,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:35:54,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:35:54,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:35:54,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:35:54,863 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:35:54,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:35:54,864 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:35:54,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:35:54,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:35:54,880 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:35:54,883 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:35:54,887 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:35:54,888 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:35:54,889 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:35:54,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:35:54,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:35:54,893 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:35:54,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:35:54,893 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:35:54,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:35:54,894 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:35:54,895 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:35:54,895 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:35:54,895 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:35:54,896 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:35:54,896 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:35:54,897 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:35:54,897 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:35:54,897 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:35:54,897 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:35:54,898 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:35:54,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:35:54,899 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:35:54,899 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 11:35:54,914 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:35:54,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:35:54,915 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:35:54,915 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:35:54,915 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:35:54,915 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:35:54,916 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:35:54,916 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:35:54,916 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:35:54,916 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:35:54,916 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:35:54,916 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 11:35:54,916 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:35:54,917 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:35:54,917 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:35:54,917 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 11:35:54,917 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 11:35:54,917 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 11:35:54,917 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:35:54,917 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 11:35:54,917 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 11:35:54,917 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 11:35:54,917 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:35:54,917 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:35:54,918 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:35:54,918 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:35:54,918 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:35:54,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:35:54,918 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:35:54,918 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:35:54,918 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 11:35:54,918 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 11:35:54,918 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:35:54,918 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:35:54,918 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:35:54,919 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 11:35:54,919 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:35:54,919 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_1f535f8a-b674-4ea6-a2cf-1752103d1344/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a87860dbf851812846995aa918799e2b576306268e8c461660702f868d3b2804 [2022-12-13 11:35:55,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:35:55,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:35:55,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:35:55,147 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:35:55,147 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:35:55,148 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c [2022-12-13 11:35:57,854 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:35:58,031 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:35:58,032 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c [2022-12-13 11:35:58,039 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/data/16064bdbf/e96ccfe3bfa94642995383187e4d5350/FLAG956629cd4 [2022-12-13 11:35:58,053 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/data/16064bdbf/e96ccfe3bfa94642995383187e4d5350 [2022-12-13 11:35:58,055 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:35:58,057 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:35:58,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:35:58,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:35:58,061 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:35:58,062 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:35:58" (1/1) ... [2022-12-13 11:35:58,063 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a7649b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:35:58, skipping insertion in model container [2022-12-13 11:35:58,063 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:35:58" (1/1) ... [2022-12-13 11:35:58,070 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:35:58,088 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:35:58,212 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:35:58,213 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:35:58,215 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:35:58,217 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:35:58,218 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:35:58,219 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:35:58,225 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_1f535f8a-b674-4ea6-a2cf-1752103d1344/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c[2553,2566] [2022-12-13 11:35:58,235 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:35:58,246 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 11:35:58,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:35:58,253 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:35:58,254 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:35:58,256 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:35:58,257 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:35:58,257 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:35:58,258 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:35:58,262 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_1f535f8a-b674-4ea6-a2cf-1752103d1344/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c[2553,2566] [2022-12-13 11:35:58,265 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:35:58,269 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 11:35:58,281 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:35:58,282 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:35:58,283 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:35:58,283 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:35:58,284 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:35:58,285 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:35:58,288 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_1f535f8a-b674-4ea6-a2cf-1752103d1344/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c[2553,2566] [2022-12-13 11:35:58,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:35:58,301 INFO L208 MainTranslator]: Completed translation [2022-12-13 11:35:58,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:35:58 WrapperNode [2022-12-13 11:35:58,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:35:58,302 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 11:35:58,302 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 11:35:58,302 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 11:35:58,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:35:58" (1/1) ... [2022-12-13 11:35:58,316 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:35:58" (1/1) ... [2022-12-13 11:35:58,330 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 98 [2022-12-13 11:35:58,330 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 11:35:58,331 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 11:35:58,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 11:35:58,331 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 11:35:58,338 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:35:58" (1/1) ... [2022-12-13 11:35:58,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:35:58" (1/1) ... [2022-12-13 11:35:58,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:35:58" (1/1) ... [2022-12-13 11:35:58,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:35:58" (1/1) ... [2022-12-13 11:35:58,346 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:35:58" (1/1) ... [2022-12-13 11:35:58,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:35:58" (1/1) ... [2022-12-13 11:35:58,350 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:35:58" (1/1) ... [2022-12-13 11:35:58,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:35:58" (1/1) ... [2022-12-13 11:35:58,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 11:35:58,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 11:35:58,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 11:35:58,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 11:35:58,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:35:58" (1/1) ... [2022-12-13 11:35:58,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:35:58,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:35:58,382 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 11:35:58,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 11:35:58,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 11:35:58,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 11:35:58,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 11:35:58,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 11:35:58,418 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 11:35:58,418 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 11:35:58,418 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 11:35:58,418 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 11:35:58,418 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 11:35:58,418 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 11:35:58,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 11:35:58,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 11:35:58,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 11:35:58,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 11:35:58,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 11:35:58,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 11:35:58,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 11:35:58,420 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 11:35:58,510 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 11:35:58,511 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 11:35:58,933 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 11:35:59,017 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 11:35:59,017 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 11:35:59,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:35:59 BoogieIcfgContainer [2022-12-13 11:35:59,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 11:35:59,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 11:35:59,022 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 11:35:59,026 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 11:35:59,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 11:35:58" (1/3) ... [2022-12-13 11:35:59,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33d451fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:35:59, skipping insertion in model container [2022-12-13 11:35:59,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:35:58" (2/3) ... [2022-12-13 11:35:59,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33d451fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:35:59, skipping insertion in model container [2022-12-13 11:35:59,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:35:59" (3/3) ... [2022-12-13 11:35:59,028 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array.wvr.c [2022-12-13 11:35:59,048 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 11:35:59,048 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-12-13 11:35:59,048 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 11:35:59,127 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 11:35:59,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 180 transitions, 384 flow [2022-12-13 11:35:59,224 INFO L130 PetriNetUnfolder]: 12/177 cut-off events. [2022-12-13 11:35:59,224 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 11:35:59,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 177 events. 12/177 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 210 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 126. Up to 2 conditions per place. [2022-12-13 11:35:59,230 INFO L82 GeneralOperation]: Start removeDead. Operand has 178 places, 180 transitions, 384 flow [2022-12-13 11:35:59,235 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 172 transitions, 362 flow [2022-12-13 11:35:59,238 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:35:59,248 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 172 transitions, 362 flow [2022-12-13 11:35:59,251 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 172 transitions, 362 flow [2022-12-13 11:35:59,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 172 transitions, 362 flow [2022-12-13 11:35:59,287 INFO L130 PetriNetUnfolder]: 12/172 cut-off events. [2022-12-13 11:35:59,287 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 11:35:59,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 172 events. 12/172 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 210 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 126. Up to 2 conditions per place. [2022-12-13 11:35:59,290 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2022-12-13 11:36:18,470 INFO L134 LiptonReduction]: Checked pairs total: 3507 [2022-12-13 11:36:18,471 INFO L136 LiptonReduction]: Total number of compositions: 167 [2022-12-13 11:36:18,480 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:36:18,485 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;@7b9c3ca2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:36:18,485 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2022-12-13 11:36:18,486 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 11:36:18,486 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:36:18,486 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:36:18,487 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:36:18,487 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 11:36:18,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:36:18,490 INFO L85 PathProgramCache]: Analyzing trace with hash 22860, now seen corresponding path program 1 times [2022-12-13 11:36:18,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:36:18,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1354588252] [2022-12-13 11:36:18,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:36:18,499 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 11:36:18,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:36:18,500 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:18,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:36:18,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 11:36:18,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:36:18,654 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 11:36:18,655 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 11:36:18,676 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 11:36:18,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:36:18,677 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:36:18,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1354588252] [2022-12-13 11:36:18,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1354588252] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:36:18,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:36:18,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:36:18,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542389131] [2022-12-13 11:36:18,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:36:18,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:36:18,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:36:18,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:36:18,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:36:18,800 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 347 [2022-12-13 11:36:18,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 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 11:36:18,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:36:18,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 347 [2022-12-13 11:36:18,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:36:19,247 INFO L130 PetriNetUnfolder]: 2707/3454 cut-off events. [2022-12-13 11:36:19,248 INFO L131 PetriNetUnfolder]: For 47/47 co-relation queries the response was YES. [2022-12-13 11:36:19,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6975 conditions, 3454 events. 2707/3454 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 13961 event pairs, 1291 based on Foata normal form. 0/973 useless extension candidates. Maximal degree in co-relation 5975. Up to 3423 conditions per place. [2022-12-13 11:36:19,266 INFO L137 encePairwiseOnDemand]: 338/347 looper letters, 39 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2022-12-13 11:36:19,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 43 transitions, 184 flow [2022-12-13 11:36:19,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:36:19,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:36:19,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2022-12-13 11:36:19,276 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4755043227665706 [2022-12-13 11:36:19,277 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2022-12-13 11:36:19,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2022-12-13 11:36:19,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:36:19,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2022-12-13 11:36:19,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:36:19,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 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 11:36:19,288 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 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 11:36:19,289 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 120 flow. Second operand 3 states and 495 transitions. [2022-12-13 11:36:19,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 43 transitions, 184 flow [2022-12-13 11:36:19,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 11:36:19,296 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 94 flow [2022-12-13 11:36:19,297 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2022-12-13 11:36:19,300 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -12 predicate places. [2022-12-13 11:36:19,300 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 94 flow [2022-12-13 11:36:19,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 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 11:36:19,300 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:36:19,300 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:36:19,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:19,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:19,501 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 11:36:19,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:36:19,502 INFO L85 PathProgramCache]: Analyzing trace with hash 23008, now seen corresponding path program 1 times [2022-12-13 11:36:19,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:36:19,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1658529011] [2022-12-13 11:36:19,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:36:19,502 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 11:36:19,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:36:19,503 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:19,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:19,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:36:19,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:36:19,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:36:19,586 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 11:36:19,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:36:19,586 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:36:19,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1658529011] [2022-12-13 11:36:19,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1658529011] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:36:19,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:36:19,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:36:19,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597284074] [2022-12-13 11:36:19,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:36:19,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:36:19,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:36:19,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:36:19,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:36:19,640 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 347 [2022-12-13 11:36:19,641 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 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 11:36:19,641 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:36:19,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 347 [2022-12-13 11:36:19,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:36:20,063 INFO L130 PetriNetUnfolder]: 2707/3456 cut-off events. [2022-12-13 11:36:20,063 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 11:36:20,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6916 conditions, 3456 events. 2707/3456 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 14005 event pairs, 1291 based on Foata normal form. 0/974 useless extension candidates. Maximal degree in co-relation 6910. Up to 3424 conditions per place. [2022-12-13 11:36:20,075 INFO L137 encePairwiseOnDemand]: 342/347 looper letters, 40 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2022-12-13 11:36:20,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 182 flow [2022-12-13 11:36:20,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:36:20,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:36:20,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 498 transitions. [2022-12-13 11:36:20,077 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4783861671469741 [2022-12-13 11:36:20,077 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 498 transitions. [2022-12-13 11:36:20,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 498 transitions. [2022-12-13 11:36:20,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:36:20,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 498 transitions. [2022-12-13 11:36:20,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 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 11:36:20,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 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 11:36:20,081 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 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 11:36:20,081 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 94 flow. Second operand 3 states and 498 transitions. [2022-12-13 11:36:20,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 182 flow [2022-12-13 11:36:20,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 181 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:36:20,083 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 109 flow [2022-12-13 11:36:20,083 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2022-12-13 11:36:20,083 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -10 predicate places. [2022-12-13 11:36:20,083 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 109 flow [2022-12-13 11:36:20,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 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 11:36:20,084 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:36:20,084 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:36:20,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:20,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:20,285 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 11:36:20,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:36:20,286 INFO L85 PathProgramCache]: Analyzing trace with hash 22861, now seen corresponding path program 1 times [2022-12-13 11:36:20,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:36:20,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747294800] [2022-12-13 11:36:20,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:36:20,288 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 11:36:20,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:36:20,290 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:20,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:36:20,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:36:20,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:36:20,525 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:36:20,526 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 11:36:20,545 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 11:36:20,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:36:20,545 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:36:20,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747294800] [2022-12-13 11:36:20,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747294800] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:36:20,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:36:20,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:36:20,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435696178] [2022-12-13 11:36:20,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:36:20,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:36:20,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:36:20,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:36:20,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:36:20,672 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 347 [2022-12-13 11:36:20,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 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 11:36:20,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:36:20,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 347 [2022-12-13 11:36:20,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:36:21,103 INFO L130 PetriNetUnfolder]: 2707/3455 cut-off events. [2022-12-13 11:36:21,104 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 11:36:21,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6922 conditions, 3455 events. 2707/3455 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 13956 event pairs, 1291 based on Foata normal form. 1/976 useless extension candidates. Maximal degree in co-relation 6914. Up to 3424 conditions per place. [2022-12-13 11:36:21,126 INFO L137 encePairwiseOnDemand]: 344/347 looper letters, 39 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2022-12-13 11:36:21,126 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 44 transitions, 191 flow [2022-12-13 11:36:21,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:36:21,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:36:21,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 489 transitions. [2022-12-13 11:36:21,129 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4697406340057637 [2022-12-13 11:36:21,129 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 489 transitions. [2022-12-13 11:36:21,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 489 transitions. [2022-12-13 11:36:21,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:36:21,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 489 transitions. [2022-12-13 11:36:21,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 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 11:36:21,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 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 11:36:21,134 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 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 11:36:21,134 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 109 flow. Second operand 3 states and 489 transitions. [2022-12-13 11:36:21,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 44 transitions, 191 flow [2022-12-13 11:36:21,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 44 transitions, 187 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 11:36:21,136 INFO L231 Difference]: Finished difference. Result has 49 places, 44 transitions, 113 flow [2022-12-13 11:36:21,136 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=49, PETRI_TRANSITIONS=44} [2022-12-13 11:36:21,137 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -8 predicate places. [2022-12-13 11:36:21,137 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 44 transitions, 113 flow [2022-12-13 11:36:21,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 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 11:36:21,137 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:36:21,137 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 11:36:21,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:21,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:21,338 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 11:36:21,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:36:21,339 INFO L85 PathProgramCache]: Analyzing trace with hash 712975, now seen corresponding path program 1 times [2022-12-13 11:36:21,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:36:21,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2130971652] [2022-12-13 11:36:21,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:36:21,340 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 11:36:21,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:36:21,341 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:21,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:36:21,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 11:36:21,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:36:21,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:36:21,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:36:21,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:36:21,580 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-12-13 11:36:21,581 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 3 case distinctions, treesize of input 15 treesize of output 33 [2022-12-13 11:36:21,606 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 11:36:21,606 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 23 treesize of output 19 [2022-12-13 11:36:21,667 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 11:36:21,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:36:21,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:36:21,801 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:36:21,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2130971652] [2022-12-13 11:36:21,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2130971652] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 11:36:21,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 11:36:21,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2022-12-13 11:36:21,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465110099] [2022-12-13 11:36:21,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:36:21,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:36:21,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:36:21,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:36:21,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 11:36:22,206 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 347 [2022-12-13 11:36:22,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 113 flow. Second operand has 4 states, 4 states have (on average 141.75) internal successors, (567), 4 states have internal predecessors, (567), 0 states have call successors, (0), 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 11:36:22,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:36:22,207 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 347 [2022-12-13 11:36:22,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:36:22,574 INFO L130 PetriNetUnfolder]: 2132/2754 cut-off events. [2022-12-13 11:36:22,575 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 11:36:22,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5522 conditions, 2754 events. 2132/2754 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 11063 event pairs, 1016 based on Foata normal form. 0/825 useless extension candidates. Maximal degree in co-relation 5512. Up to 2723 conditions per place. [2022-12-13 11:36:22,585 INFO L137 encePairwiseOnDemand]: 344/347 looper letters, 38 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2022-12-13 11:36:22,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 42 transitions, 185 flow [2022-12-13 11:36:22,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:36:22,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:36:22,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 463 transitions. [2022-12-13 11:36:22,588 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4447646493756004 [2022-12-13 11:36:22,588 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 463 transitions. [2022-12-13 11:36:22,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 463 transitions. [2022-12-13 11:36:22,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:36:22,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 463 transitions. [2022-12-13 11:36:22,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 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 11:36:22,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 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 11:36:22,591 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 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 11:36:22,591 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 113 flow. Second operand 3 states and 463 transitions. [2022-12-13 11:36:22,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 42 transitions, 185 flow [2022-12-13 11:36:22,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 42 transitions, 181 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:36:22,592 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 105 flow [2022-12-13 11:36:22,592 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2022-12-13 11:36:22,593 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -10 predicate places. [2022-12-13 11:36:22,593 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 105 flow [2022-12-13 11:36:22,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 141.75) internal successors, (567), 4 states have internal predecessors, (567), 0 states have call successors, (0), 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 11:36:22,593 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:36:22,593 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 11:36:22,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:22,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:22,794 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 11:36:22,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:36:22,794 INFO L85 PathProgramCache]: Analyzing trace with hash 712974, now seen corresponding path program 1 times [2022-12-13 11:36:22,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:36:22,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1055541613] [2022-12-13 11:36:22,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:36:22,795 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 11:36:22,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:36:22,795 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:22,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:36:22,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:36:22,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:36:22,916 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2022-12-13 11:36:22,916 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 6 case distinctions, treesize of input 38 treesize of output 51 [2022-12-13 11:36:22,959 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 11:36:22,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:36:22,960 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:36:22,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1055541613] [2022-12-13 11:36:22,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1055541613] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:36:22,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:36:22,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:36:22,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368013209] [2022-12-13 11:36:22,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:36:22,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:36:22,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:36:22,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:36:22,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:36:23,084 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 347 [2022-12-13 11:36:23,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 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 11:36:23,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:36:23,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 347 [2022-12-13 11:36:23,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:36:23,388 INFO L130 PetriNetUnfolder]: 1557/2053 cut-off events. [2022-12-13 11:36:23,388 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-13 11:36:23,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4118 conditions, 2053 events. 1557/2053 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 8183 event pairs, 741 based on Foata normal form. 0/675 useless extension candidates. Maximal degree in co-relation 4108. Up to 2022 conditions per place. [2022-12-13 11:36:23,399 INFO L137 encePairwiseOnDemand]: 344/347 looper letters, 36 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2022-12-13 11:36:23,399 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 40 transitions, 173 flow [2022-12-13 11:36:23,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:36:23,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:36:23,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 485 transitions. [2022-12-13 11:36:23,401 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4658981748318924 [2022-12-13 11:36:23,401 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 485 transitions. [2022-12-13 11:36:23,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 485 transitions. [2022-12-13 11:36:23,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:36:23,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 485 transitions. [2022-12-13 11:36:23,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 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 11:36:23,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 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 11:36:23,406 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 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 11:36:23,406 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 105 flow. Second operand 3 states and 485 transitions. [2022-12-13 11:36:23,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 40 transitions, 173 flow [2022-12-13 11:36:23,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 40 transitions, 172 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:36:23,408 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 100 flow [2022-12-13 11:36:23,408 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2022-12-13 11:36:23,409 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -11 predicate places. [2022-12-13 11:36:23,409 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 100 flow [2022-12-13 11:36:23,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 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 11:36:23,409 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:36:23,409 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 11:36:23,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:23,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:23,610 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 11:36:23,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:36:23,610 INFO L85 PathProgramCache]: Analyzing trace with hash 712828, now seen corresponding path program 1 times [2022-12-13 11:36:23,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:36:23,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [392523293] [2022-12-13 11:36:23,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:36:23,611 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 11:36:23,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:36:23,612 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:23,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:36:23,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 11:36:23,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:36:23,764 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:36:23,764 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 11:36:23,820 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 11:36:23,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:36:23,999 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 11:36:23,999 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:36:23,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [392523293] [2022-12-13 11:36:23,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [392523293] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:36:23,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:36:23,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 11:36:24,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334224100] [2022-12-13 11:36:24,000 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:36:24,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 11:36:24,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:36:24,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 11:36:24,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 11:36:24,899 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 347 [2022-12-13 11:36:24,900 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 100 flow. Second operand has 6 states, 6 states have (on average 145.0) internal successors, (870), 6 states have internal predecessors, (870), 0 states have call successors, (0), 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 11:36:24,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:36:24,900 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 347 [2022-12-13 11:36:24,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:36:25,644 INFO L130 PetriNetUnfolder]: 3115/4107 cut-off events. [2022-12-13 11:36:25,645 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-12-13 11:36:25,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8233 conditions, 4107 events. 3115/4107 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 18502 event pairs, 1482 based on Foata normal form. 3/1352 useless extension candidates. Maximal degree in co-relation 8222. Up to 2021 conditions per place. [2022-12-13 11:36:25,657 INFO L137 encePairwiseOnDemand]: 343/347 looper letters, 68 selfloop transitions, 7 changer transitions 0/78 dead transitions. [2022-12-13 11:36:25,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 78 transitions, 344 flow [2022-12-13 11:36:25,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 11:36:25,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 11:36:25,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 942 transitions. [2022-12-13 11:36:25,660 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45244956772334294 [2022-12-13 11:36:25,660 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 942 transitions. [2022-12-13 11:36:25,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 942 transitions. [2022-12-13 11:36:25,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:36:25,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 942 transitions. [2022-12-13 11:36:25,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 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 11:36:25,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 347.0) internal successors, (2429), 7 states have internal predecessors, (2429), 0 states have call successors, (0), 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 11:36:25,664 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 347.0) internal successors, (2429), 7 states have internal predecessors, (2429), 0 states have call successors, (0), 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 11:36:25,664 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 100 flow. Second operand 6 states and 942 transitions. [2022-12-13 11:36:25,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 78 transitions, 344 flow [2022-12-13 11:36:25,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 78 transitions, 343 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:36:25,665 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 157 flow [2022-12-13 11:36:25,665 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=157, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2022-12-13 11:36:25,666 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -3 predicate places. [2022-12-13 11:36:25,666 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 157 flow [2022-12-13 11:36:25,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 145.0) internal successors, (870), 6 states have internal predecessors, (870), 0 states have call successors, (0), 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 11:36:25,666 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:36:25,666 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 11:36:25,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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)] Forceful destruction successful, exit code 0 [2022-12-13 11:36:25,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:25,867 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 11:36:25,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:36:25,867 INFO L85 PathProgramCache]: Analyzing trace with hash 685183747, now seen corresponding path program 1 times [2022-12-13 11:36:25,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:36:25,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721743106] [2022-12-13 11:36:25,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:36:25,868 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 11:36:25,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:36:25,869 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:25,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:25,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:36:25,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 11:36:25,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:36:25,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:36:25,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:36:26,044 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-12-13 11:36:26,044 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 3 case distinctions, treesize of input 17 treesize of output 38 [2022-12-13 11:36:26,054 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 14 treesize of output 12 [2022-12-13 11:36:26,213 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 11:36:26,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:36:26,392 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 11:36:26,392 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:36:26,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721743106] [2022-12-13 11:36:26,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721743106] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:36:26,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:36:26,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 11:36:26,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025016928] [2022-12-13 11:36:26,393 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:36:26,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 11:36:26,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:36:26,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 11:36:26,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 11:36:27,270 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 347 [2022-12-13 11:36:27,271 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 157 flow. Second operand has 8 states, 8 states have (on average 141.25) internal successors, (1130), 8 states have internal predecessors, (1130), 0 states have call successors, (0), 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 11:36:27,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:36:27,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 347 [2022-12-13 11:36:27,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:36:28,006 INFO L130 PetriNetUnfolder]: 2941/3873 cut-off events. [2022-12-13 11:36:28,006 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-12-13 11:36:28,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7789 conditions, 3873 events. 2941/3873 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 17193 event pairs, 1396 based on Foata normal form. 0/1309 useless extension candidates. Maximal degree in co-relation 7773. Up to 1908 conditions per place. [2022-12-13 11:36:28,017 INFO L137 encePairwiseOnDemand]: 343/347 looper letters, 68 selfloop transitions, 3 changer transitions 0/74 dead transitions. [2022-12-13 11:36:28,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 74 transitions, 369 flow [2022-12-13 11:36:28,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:36:28,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:36:28,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 771 transitions. [2022-12-13 11:36:28,019 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4443804034582133 [2022-12-13 11:36:28,019 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 771 transitions. [2022-12-13 11:36:28,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 771 transitions. [2022-12-13 11:36:28,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:36:28,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 771 transitions. [2022-12-13 11:36:28,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 154.2) internal successors, (771), 5 states have internal predecessors, (771), 0 states have call successors, (0), 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 11:36:28,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 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 11:36:28,022 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 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 11:36:28,022 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 157 flow. Second operand 5 states and 771 transitions. [2022-12-13 11:36:28,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 74 transitions, 369 flow [2022-12-13 11:36:28,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 74 transitions, 357 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-12-13 11:36:28,023 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 147 flow [2022-12-13 11:36:28,023 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=147, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2022-12-13 11:36:28,024 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2022-12-13 11:36:28,024 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 147 flow [2022-12-13 11:36:28,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 141.25) internal successors, (1130), 8 states have internal predecessors, (1130), 0 states have call successors, (0), 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 11:36:28,024 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:36:28,024 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 11:36:28,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:28,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:28,225 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 11:36:28,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:36:28,225 INFO L85 PathProgramCache]: Analyzing trace with hash 685183746, now seen corresponding path program 1 times [2022-12-13 11:36:28,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:36:28,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1575701859] [2022-12-13 11:36:28,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:36:28,226 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 11:36:28,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:36:28,226 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:28,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:28,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:36:28,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 11:36:28,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:36:28,362 INFO L321 Elim1Store]: treesize reduction 101, result has 20.5 percent of original size [2022-12-13 11:36:28,362 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 4 case distinctions, treesize of input 29 treesize of output 44 [2022-12-13 11:36:28,382 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 11:36:28,383 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:36:28,383 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:36:28,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1575701859] [2022-12-13 11:36:28,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1575701859] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:36:28,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:36:28,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:36:28,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600947329] [2022-12-13 11:36:28,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:36:28,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:36:28,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:36:28,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:36:28,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:36:28,445 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 347 [2022-12-13 11:36:28,446 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 43 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:36:28,446 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:36:28,446 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 347 [2022-12-13 11:36:28,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:36:28,811 INFO L130 PetriNetUnfolder]: 2767/3639 cut-off events. [2022-12-13 11:36:28,811 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-12-13 11:36:28,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7319 conditions, 3639 events. 2767/3639 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 16103 event pairs, 1310 based on Foata normal form. 0/1265 useless extension candidates. Maximal degree in co-relation 7302. Up to 3577 conditions per place. [2022-12-13 11:36:28,821 INFO L137 encePairwiseOnDemand]: 344/347 looper letters, 37 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2022-12-13 11:36:28,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 41 transitions, 219 flow [2022-12-13 11:36:28,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:36:28,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:36:28,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 472 transitions. [2022-12-13 11:36:28,822 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45341018251681076 [2022-12-13 11:36:28,822 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 472 transitions. [2022-12-13 11:36:28,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 472 transitions. [2022-12-13 11:36:28,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:36:28,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 472 transitions. [2022-12-13 11:36:28,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 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 11:36:28,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 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 11:36:28,824 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 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 11:36:28,824 INFO L175 Difference]: Start difference. First operand has 55 places, 43 transitions, 147 flow. Second operand 3 states and 472 transitions. [2022-12-13 11:36:28,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 41 transitions, 219 flow [2022-12-13 11:36:28,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 41 transitions, 214 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 11:36:28,825 INFO L231 Difference]: Finished difference. Result has 52 places, 41 transitions, 140 flow [2022-12-13 11:36:28,826 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=52, PETRI_TRANSITIONS=41} [2022-12-13 11:36:28,826 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -5 predicate places. [2022-12-13 11:36:28,826 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 41 transitions, 140 flow [2022-12-13 11:36:28,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:36:28,826 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:36:28,826 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 11:36:28,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:29,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:29,027 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 11:36:29,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:36:29,027 INFO L85 PathProgramCache]: Analyzing trace with hash -234145784, now seen corresponding path program 1 times [2022-12-13 11:36:29,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:36:29,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049887943] [2022-12-13 11:36:29,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:36:29,028 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 11:36:29,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:36:29,029 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:29,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:29,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:36:29,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 11:36:29,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:36:29,162 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 11:36:29,163 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 11:36:29,179 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 11:36:29,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:36:29,179 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:36:29,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049887943] [2022-12-13 11:36:29,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049887943] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:36:29,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:36:29,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:36:29,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330276755] [2022-12-13 11:36:29,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:36:29,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:36:29,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:36:29,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:36:29,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:36:29,281 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 347 [2022-12-13 11:36:29,281 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 41 transitions, 140 flow. Second operand has 4 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:36:29,281 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:36:29,281 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 347 [2022-12-13 11:36:29,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:36:29,548 INFO L130 PetriNetUnfolder]: 1427/1935 cut-off events. [2022-12-13 11:36:29,548 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-12-13 11:36:29,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3910 conditions, 1935 events. 1427/1935 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 8045 event pairs, 662 based on Foata normal form. 0/827 useless extension candidates. Maximal degree in co-relation 3893. Up to 1886 conditions per place. [2022-12-13 11:36:29,554 INFO L137 encePairwiseOnDemand]: 342/347 looper letters, 31 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2022-12-13 11:36:29,554 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 38 transitions, 204 flow [2022-12-13 11:36:29,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:36:29,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:36:29,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 608 transitions. [2022-12-13 11:36:29,556 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43804034582132567 [2022-12-13 11:36:29,557 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 608 transitions. [2022-12-13 11:36:29,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 608 transitions. [2022-12-13 11:36:29,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:36:29,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 608 transitions. [2022-12-13 11:36:29,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 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 11:36:29,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 347.0) internal successors, (1735), 5 states have internal predecessors, (1735), 0 states have call successors, (0), 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 11:36:29,561 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 347.0) internal successors, (1735), 5 states have internal predecessors, (1735), 0 states have call successors, (0), 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 11:36:29,561 INFO L175 Difference]: Start difference. First operand has 52 places, 41 transitions, 140 flow. Second operand 4 states and 608 transitions. [2022-12-13 11:36:29,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 38 transitions, 204 flow [2022-12-13 11:36:29,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 38 transitions, 203 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:36:29,563 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 141 flow [2022-12-13 11:36:29,563 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=141, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2022-12-13 11:36:29,563 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -6 predicate places. [2022-12-13 11:36:29,563 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 141 flow [2022-12-13 11:36:29,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:36:29,564 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:36:29,564 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 11:36:29,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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)] Forceful destruction successful, exit code 0 [2022-12-13 11:36:29,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:29,765 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 11:36:29,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:36:29,765 INFO L85 PathProgramCache]: Analyzing trace with hash -234869491, now seen corresponding path program 2 times [2022-12-13 11:36:29,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:36:29,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2066446934] [2022-12-13 11:36:29,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:36:29,765 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 11:36:29,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:36:29,766 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:29,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:29,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:36:29,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:36:29,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 11:36:29,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:36:29,923 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:36:29,923 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 11:36:30,021 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 11:36:30,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:36:30,493 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 11:36:30,493 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:36:30,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2066446934] [2022-12-13 11:36:30,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2066446934] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:36:30,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:36:30,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 11:36:30,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277511470] [2022-12-13 11:36:30,494 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:36:30,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:36:30,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:36:30,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:36:30,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:36:33,735 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 347 [2022-12-13 11:36:33,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 141 flow. Second operand has 12 states, 12 states have (on average 146.0) internal successors, (1752), 12 states have internal predecessors, (1752), 0 states have call successors, (0), 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 11:36:33,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:36:33,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 347 [2022-12-13 11:36:33,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:36:37,853 INFO L130 PetriNetUnfolder]: 6410/8681 cut-off events. [2022-12-13 11:36:37,853 INFO L131 PetriNetUnfolder]: For 97/97 co-relation queries the response was YES. [2022-12-13 11:36:37,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17431 conditions, 8681 events. 6410/8681 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 44368 event pairs, 2979 based on Foata normal form. 6/3701 useless extension candidates. Maximal degree in co-relation 17413. Up to 944 conditions per place. [2022-12-13 11:36:37,876 INFO L137 encePairwiseOnDemand]: 343/347 looper letters, 236 selfloop transitions, 12 changer transitions 0/251 dead transitions. [2022-12-13 11:36:37,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 251 transitions, 1167 flow [2022-12-13 11:36:37,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 11:36:37,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 11:36:37,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1994 transitions. [2022-12-13 11:36:37,880 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47886647454370795 [2022-12-13 11:36:37,880 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1994 transitions. [2022-12-13 11:36:37,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1994 transitions. [2022-12-13 11:36:37,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:36:37,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1994 transitions. [2022-12-13 11:36:37,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 166.16666666666666) internal successors, (1994), 12 states have internal predecessors, (1994), 0 states have call successors, (0), 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 11:36:37,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 347.0) internal successors, (4511), 13 states have internal predecessors, (4511), 0 states have call successors, (0), 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 11:36:37,887 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 347.0) internal successors, (4511), 13 states have internal predecessors, (4511), 0 states have call successors, (0), 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 11:36:37,887 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 141 flow. Second operand 12 states and 1994 transitions. [2022-12-13 11:36:37,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 251 transitions, 1167 flow [2022-12-13 11:36:37,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 251 transitions, 1155 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:36:37,893 INFO L231 Difference]: Finished difference. Result has 67 places, 45 transitions, 223 flow [2022-12-13 11:36:37,893 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=223, PETRI_PLACES=67, PETRI_TRANSITIONS=45} [2022-12-13 11:36:37,893 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 10 predicate places. [2022-12-13 11:36:37,894 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 45 transitions, 223 flow [2022-12-13 11:36:37,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 146.0) internal successors, (1752), 12 states have internal predecessors, (1752), 0 states have call successors, (0), 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 11:36:37,895 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:36:37,895 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 11:36:37,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:38,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:38,096 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 11:36:38,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:36:38,096 INFO L85 PathProgramCache]: Analyzing trace with hash -234145783, now seen corresponding path program 1 times [2022-12-13 11:36:38,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:36:38,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669840397] [2022-12-13 11:36:38,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:36:38,097 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 11:36:38,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:36:38,099 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:38,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:38,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:36:38,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:36:38,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:36:38,281 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 11:36:38,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:36:38,448 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 25 treesize of output 21 [2022-12-13 11:36:38,505 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 11:36:38,505 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:36:38,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669840397] [2022-12-13 11:36:38,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669840397] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:36:38,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:36:38,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 11:36:38,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385801748] [2022-12-13 11:36:38,506 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:36:38,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 11:36:38,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:36:38,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 11:36:38,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:36:39,922 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 347 [2022-12-13 11:36:39,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 45 transitions, 223 flow. Second operand has 10 states, 10 states have (on average 143.2) internal successors, (1432), 10 states have internal predecessors, (1432), 0 states have call successors, (0), 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 11:36:39,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:36:39,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 347 [2022-12-13 11:36:39,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:36:41,712 INFO L130 PetriNetUnfolder]: 9569/13190 cut-off events. [2022-12-13 11:36:41,712 INFO L131 PetriNetUnfolder]: For 186/186 co-relation queries the response was YES. [2022-12-13 11:36:41,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26604 conditions, 13190 events. 9569/13190 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 74627 event pairs, 2340 based on Foata normal form. 0/6096 useless extension candidates. Maximal degree in co-relation 26579. Up to 6985 conditions per place. [2022-12-13 11:36:41,760 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 104 selfloop transitions, 12 changer transitions 0/118 dead transitions. [2022-12-13 11:36:41,761 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 118 transitions, 624 flow [2022-12-13 11:36:41,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 11:36:41,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 11:36:41,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1385 transitions. [2022-12-13 11:36:41,764 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4434838296509766 [2022-12-13 11:36:41,765 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1385 transitions. [2022-12-13 11:36:41,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1385 transitions. [2022-12-13 11:36:41,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:36:41,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1385 transitions. [2022-12-13 11:36:41,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 153.88888888888889) internal successors, (1385), 9 states have internal predecessors, (1385), 0 states have call successors, (0), 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 11:36:41,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 347.0) internal successors, (3470), 10 states have internal predecessors, (3470), 0 states have call successors, (0), 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 11:36:41,771 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 347.0) internal successors, (3470), 10 states have internal predecessors, (3470), 0 states have call successors, (0), 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 11:36:41,771 INFO L175 Difference]: Start difference. First operand has 67 places, 45 transitions, 223 flow. Second operand 9 states and 1385 transitions. [2022-12-13 11:36:41,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 118 transitions, 624 flow [2022-12-13 11:36:41,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 118 transitions, 611 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-12-13 11:36:41,774 INFO L231 Difference]: Finished difference. Result has 73 places, 49 transitions, 261 flow [2022-12-13 11:36:41,774 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=261, PETRI_PLACES=73, PETRI_TRANSITIONS=49} [2022-12-13 11:36:41,774 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 16 predicate places. [2022-12-13 11:36:41,774 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 49 transitions, 261 flow [2022-12-13 11:36:41,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 143.2) internal successors, (1432), 10 states have internal predecessors, (1432), 0 states have call successors, (0), 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 11:36:41,775 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:36:41,775 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:36:41,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:41,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:41,976 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 11:36:41,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:36:41,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1331418322, now seen corresponding path program 1 times [2022-12-13 11:36:41,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:36:41,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1486432568] [2022-12-13 11:36:41,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:36:41,980 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 11:36:41,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:36:41,984 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:41,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:36:42,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 11:36:42,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:36:42,148 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:36:42,148 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 11:36:42,284 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 11:36:42,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:36:42,667 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 11:36:42,667 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:36:42,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1486432568] [2022-12-13 11:36:42,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1486432568] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:36:42,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:36:42,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 11:36:42,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86466567] [2022-12-13 11:36:42,667 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:36:42,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 11:36:42,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:36:42,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 11:36:42,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:36:44,905 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 347 [2022-12-13 11:36:44,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 49 transitions, 261 flow. Second operand has 10 states, 10 states have (on average 143.4) internal successors, (1434), 10 states have internal predecessors, (1434), 0 states have call successors, (0), 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 11:36:44,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:36:44,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 347 [2022-12-13 11:36:44,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:36:47,712 INFO L130 PetriNetUnfolder]: 14951/19922 cut-off events. [2022-12-13 11:36:47,712 INFO L131 PetriNetUnfolder]: For 2342/2342 co-relation queries the response was YES. [2022-12-13 11:36:47,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45903 conditions, 19922 events. 14951/19922 cut-off events. For 2342/2342 co-relation queries the response was YES. Maximal size of possible extension queue 917. Compared 111558 event pairs, 963 based on Foata normal form. 450/11543 useless extension candidates. Maximal degree in co-relation 45875. Up to 6057 conditions per place. [2022-12-13 11:36:47,784 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 98 selfloop transitions, 15 changer transitions 0/115 dead transitions. [2022-12-13 11:36:47,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 115 transitions, 642 flow [2022-12-13 11:36:47,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 11:36:47,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 11:36:47,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1237 transitions. [2022-12-13 11:36:47,788 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44560518731988474 [2022-12-13 11:36:47,788 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1237 transitions. [2022-12-13 11:36:47,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1237 transitions. [2022-12-13 11:36:47,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:36:47,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1237 transitions. [2022-12-13 11:36:47,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 154.625) internal successors, (1237), 8 states have internal predecessors, (1237), 0 states have call successors, (0), 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 11:36:47,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 347.0) internal successors, (3123), 9 states have internal predecessors, (3123), 0 states have call successors, (0), 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 11:36:47,792 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 347.0) internal successors, (3123), 9 states have internal predecessors, (3123), 0 states have call successors, (0), 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 11:36:47,792 INFO L175 Difference]: Start difference. First operand has 73 places, 49 transitions, 261 flow. Second operand 8 states and 1237 transitions. [2022-12-13 11:36:47,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 115 transitions, 642 flow [2022-12-13 11:36:47,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 115 transitions, 623 flow, removed 7 selfloop flow, removed 3 redundant places. [2022-12-13 11:36:47,798 INFO L231 Difference]: Finished difference. Result has 82 places, 54 transitions, 331 flow [2022-12-13 11:36:47,798 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=331, PETRI_PLACES=82, PETRI_TRANSITIONS=54} [2022-12-13 11:36:47,799 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 25 predicate places. [2022-12-13 11:36:47,799 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 54 transitions, 331 flow [2022-12-13 11:36:47,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 143.4) internal successors, (1434), 10 states have internal predecessors, (1434), 0 states have call successors, (0), 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 11:36:47,799 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:36:47,799 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:36:47,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:48,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:48,000 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 11:36:48,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:36:48,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1331599282, now seen corresponding path program 1 times [2022-12-13 11:36:48,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:36:48,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1004828783] [2022-12-13 11:36:48,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:36:48,004 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 11:36:48,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:36:48,007 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:48,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:48,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:36:48,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 11:36:48,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:36:48,176 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:36:48,177 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 11:36:48,316 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 11:36:48,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:36:48,492 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 11:36:48,492 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:36:48,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1004828783] [2022-12-13 11:36:48,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1004828783] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:36:48,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:36:48,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 11:36:48,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172082647] [2022-12-13 11:36:48,493 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:36:48,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 11:36:48,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:36:48,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 11:36:48,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 11:36:51,176 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 11:36:51,270 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 347 [2022-12-13 11:36:51,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 54 transitions, 331 flow. Second operand has 8 states, 8 states have (on average 141.75) internal successors, (1134), 8 states have internal predecessors, (1134), 0 states have call successors, (0), 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 11:36:51,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:36:51,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 347 [2022-12-13 11:36:51,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:36:53,229 INFO L130 PetriNetUnfolder]: 12144/16314 cut-off events. [2022-12-13 11:36:53,229 INFO L131 PetriNetUnfolder]: For 18494/19902 co-relation queries the response was YES. [2022-12-13 11:36:53,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45868 conditions, 16314 events. 12144/16314 cut-off events. For 18494/19902 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 88924 event pairs, 6316 based on Foata normal form. 1408/11082 useless extension candidates. Maximal degree in co-relation 45835. Up to 14340 conditions per place. [2022-12-13 11:36:53,295 INFO L137 encePairwiseOnDemand]: 343/347 looper letters, 73 selfloop transitions, 3 changer transitions 0/80 dead transitions. [2022-12-13 11:36:53,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 80 transitions, 595 flow [2022-12-13 11:36:53,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:36:53,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:36:53,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 757 transitions. [2022-12-13 11:36:53,298 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43631123919308357 [2022-12-13 11:36:53,298 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 757 transitions. [2022-12-13 11:36:53,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 757 transitions. [2022-12-13 11:36:53,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:36:53,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 757 transitions. [2022-12-13 11:36:53,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.4) internal successors, (757), 5 states have internal predecessors, (757), 0 states have call successors, (0), 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 11:36:53,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 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 11:36:53,301 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 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 11:36:53,301 INFO L175 Difference]: Start difference. First operand has 82 places, 54 transitions, 331 flow. Second operand 5 states and 757 transitions. [2022-12-13 11:36:53,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 80 transitions, 595 flow [2022-12-13 11:36:53,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 80 transitions, 556 flow, removed 14 selfloop flow, removed 3 redundant places. [2022-12-13 11:36:53,320 INFO L231 Difference]: Finished difference. Result has 81 places, 52 transitions, 308 flow [2022-12-13 11:36:53,320 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=81, PETRI_TRANSITIONS=52} [2022-12-13 11:36:53,320 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 24 predicate places. [2022-12-13 11:36:53,321 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 52 transitions, 308 flow [2022-12-13 11:36:53,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 141.75) internal successors, (1134), 8 states have internal predecessors, (1134), 0 states have call successors, (0), 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 11:36:53,322 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:36:53,322 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:36:53,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-12-13 11:36:53,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:53,523 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 11:36:53,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:36:53,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1331599281, now seen corresponding path program 1 times [2022-12-13 11:36:53,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:36:53,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1664645331] [2022-12-13 11:36:53,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:36:53,526 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 11:36:53,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:36:53,529 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:53,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:53,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:36:53,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 11:36:53,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:36:53,672 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-13 11:36:53,672 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 29 [2022-12-13 11:36:53,694 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 11:36:53,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:36:53,694 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:36:53,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1664645331] [2022-12-13 11:36:53,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1664645331] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:36:53,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:36:53,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:36:53,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301091614] [2022-12-13 11:36:53,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:36:53,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:36:53,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:36:53,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:36:53,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:36:53,763 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 347 [2022-12-13 11:36:53,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 52 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:36:53,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:36:53,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 347 [2022-12-13 11:36:53,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:36:55,239 INFO L130 PetriNetUnfolder]: 11054/14864 cut-off events. [2022-12-13 11:36:55,239 INFO L131 PetriNetUnfolder]: For 15995/17259 co-relation queries the response was YES. [2022-12-13 11:36:55,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39173 conditions, 14864 events. 11054/14864 cut-off events. For 15995/17259 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 80275 event pairs, 5724 based on Foata normal form. 1264/10270 useless extension candidates. Maximal degree in co-relation 39140. Up to 14621 conditions per place. [2022-12-13 11:36:55,294 INFO L137 encePairwiseOnDemand]: 344/347 looper letters, 45 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2022-12-13 11:36:55,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 50 transitions, 396 flow [2022-12-13 11:36:55,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:36:55,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:36:55,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 465 transitions. [2022-12-13 11:36:55,296 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44668587896253603 [2022-12-13 11:36:55,296 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 465 transitions. [2022-12-13 11:36:55,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 465 transitions. [2022-12-13 11:36:55,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:36:55,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 465 transitions. [2022-12-13 11:36:55,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 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 11:36:55,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 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 11:36:55,298 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 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 11:36:55,298 INFO L175 Difference]: Start difference. First operand has 81 places, 52 transitions, 308 flow. Second operand 3 states and 465 transitions. [2022-12-13 11:36:55,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 50 transitions, 396 flow [2022-12-13 11:36:55,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 50 transitions, 391 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 11:36:55,311 INFO L231 Difference]: Finished difference. Result has 78 places, 50 transitions, 301 flow [2022-12-13 11:36:55,311 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=301, PETRI_PLACES=78, PETRI_TRANSITIONS=50} [2022-12-13 11:36:55,311 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 21 predicate places. [2022-12-13 11:36:55,312 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 50 transitions, 301 flow [2022-12-13 11:36:55,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:36:55,312 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:36:55,312 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:36:55,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:55,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:55,513 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 11:36:55,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:36:55,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1670100015, now seen corresponding path program 1 times [2022-12-13 11:36:55,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:36:55,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [424783190] [2022-12-13 11:36:55,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:36:55,516 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 11:36:55,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:36:55,518 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:55,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:36:55,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:36:55,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:36:55,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:36:55,787 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 11:36:55,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:36:55,965 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 25 treesize of output 21 [2022-12-13 11:36:56,026 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 11:36:56,026 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:36:56,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [424783190] [2022-12-13 11:36:56,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [424783190] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:36:56,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:36:56,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 11:36:56,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630699580] [2022-12-13 11:36:56,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:36:56,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 11:36:56,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:36:56,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 11:36:56,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:36:57,387 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 347 [2022-12-13 11:36:57,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 50 transitions, 301 flow. Second operand has 10 states, 10 states have (on average 143.6) internal successors, (1436), 10 states have internal predecessors, (1436), 0 states have call successors, (0), 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 11:36:57,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:36:57,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 347 [2022-12-13 11:36:57,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:37:00,083 INFO L130 PetriNetUnfolder]: 15405/21123 cut-off events. [2022-12-13 11:37:00,083 INFO L131 PetriNetUnfolder]: For 24708/26800 co-relation queries the response was YES. [2022-12-13 11:37:00,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57064 conditions, 21123 events. 15405/21123 cut-off events. For 24708/26800 co-relation queries the response was YES. Maximal size of possible extension queue 995. Compared 122094 event pairs, 5175 based on Foata normal form. 2092/16269 useless extension candidates. Maximal degree in co-relation 57031. Up to 12297 conditions per place. [2022-12-13 11:37:00,171 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 108 selfloop transitions, 12 changer transitions 0/123 dead transitions. [2022-12-13 11:37:00,171 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 123 transitions, 829 flow [2022-12-13 11:37:00,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 11:37:00,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 11:37:00,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1365 transitions. [2022-12-13 11:37:00,174 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43707973102785785 [2022-12-13 11:37:00,174 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1365 transitions. [2022-12-13 11:37:00,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1365 transitions. [2022-12-13 11:37:00,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:37:00,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1365 transitions. [2022-12-13 11:37:00,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 151.66666666666666) internal successors, (1365), 9 states have internal predecessors, (1365), 0 states have call successors, (0), 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 11:37:00,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 347.0) internal successors, (3470), 10 states have internal predecessors, (3470), 0 states have call successors, (0), 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 11:37:00,178 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 347.0) internal successors, (3470), 10 states have internal predecessors, (3470), 0 states have call successors, (0), 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 11:37:00,178 INFO L175 Difference]: Start difference. First operand has 78 places, 50 transitions, 301 flow. Second operand 9 states and 1365 transitions. [2022-12-13 11:37:00,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 123 transitions, 829 flow [2022-12-13 11:37:00,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 123 transitions, 828 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:37:00,195 INFO L231 Difference]: Finished difference. Result has 87 places, 53 transitions, 342 flow [2022-12-13 11:37:00,195 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=342, PETRI_PLACES=87, PETRI_TRANSITIONS=53} [2022-12-13 11:37:00,195 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 30 predicate places. [2022-12-13 11:37:00,195 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 53 transitions, 342 flow [2022-12-13 11:37:00,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 143.6) internal successors, (1436), 10 states have internal predecessors, (1436), 0 states have call successors, (0), 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 11:37:00,195 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:37:00,195 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:37:00,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:37:00,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:37:00,396 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 11:37:00,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:37:00,397 INFO L85 PathProgramCache]: Analyzing trace with hash -233490332, now seen corresponding path program 1 times [2022-12-13 11:37:00,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:37:00,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1208829596] [2022-12-13 11:37:00,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:37:00,399 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 11:37:00,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:37:00,401 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:37:00,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:37:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:37:00,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 11:37:00,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:37:00,557 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:37:00,558 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 11:37:00,719 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 11:37:00,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:37:01,094 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 11:37:01,094 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:37:01,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1208829596] [2022-12-13 11:37:01,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1208829596] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:37:01,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:37:01,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 11:37:01,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876454059] [2022-12-13 11:37:01,095 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:37:01,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 11:37:01,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:37:01,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 11:37:01,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:37:03,411 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 347 [2022-12-13 11:37:03,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 53 transitions, 342 flow. Second operand has 10 states, 10 states have (on average 141.8) internal successors, (1418), 10 states have internal predecessors, (1418), 0 states have call successors, (0), 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 11:37:03,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:37:03,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 347 [2022-12-13 11:37:03,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:37:09,032 INFO L130 PetriNetUnfolder]: 29369/39767 cut-off events. [2022-12-13 11:37:09,032 INFO L131 PetriNetUnfolder]: For 55593/59485 co-relation queries the response was YES. [2022-12-13 11:37:09,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117325 conditions, 39767 events. 29369/39767 cut-off events. For 55593/59485 co-relation queries the response was YES. Maximal size of possible extension queue 1692. Compared 247535 event pairs, 4239 based on Foata normal form. 3892/34543 useless extension candidates. Maximal degree in co-relation 117289. Up to 9937 conditions per place. [2022-12-13 11:37:09,247 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 144 selfloop transitions, 15 changer transitions 0/162 dead transitions. [2022-12-13 11:37:09,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 162 transitions, 1146 flow [2022-12-13 11:37:09,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 11:37:09,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 11:37:09,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1364 transitions. [2022-12-13 11:37:09,252 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4367595260967019 [2022-12-13 11:37:09,252 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1364 transitions. [2022-12-13 11:37:09,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1364 transitions. [2022-12-13 11:37:09,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:37:09,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1364 transitions. [2022-12-13 11:37:09,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 151.55555555555554) internal successors, (1364), 9 states have internal predecessors, (1364), 0 states have call successors, (0), 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 11:37:09,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 347.0) internal successors, (3470), 10 states have internal predecessors, (3470), 0 states have call successors, (0), 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 11:37:09,258 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 347.0) internal successors, (3470), 10 states have internal predecessors, (3470), 0 states have call successors, (0), 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 11:37:09,258 INFO L175 Difference]: Start difference. First operand has 87 places, 53 transitions, 342 flow. Second operand 9 states and 1364 transitions. [2022-12-13 11:37:09,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 162 transitions, 1146 flow [2022-12-13 11:37:09,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 162 transitions, 1135 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 11:37:09,303 INFO L231 Difference]: Finished difference. Result has 95 places, 58 transitions, 413 flow [2022-12-13 11:37:09,303 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=413, PETRI_PLACES=95, PETRI_TRANSITIONS=58} [2022-12-13 11:37:09,304 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 38 predicate places. [2022-12-13 11:37:09,304 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 58 transitions, 413 flow [2022-12-13 11:37:09,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 141.8) internal successors, (1418), 10 states have internal predecessors, (1418), 0 states have call successors, (0), 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 11:37:09,304 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:37:09,304 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 11:37:09,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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)] Ended with exit code 0 [2022-12-13 11:37:09,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:37:09,505 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 11:37:09,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:37:09,506 INFO L85 PathProgramCache]: Analyzing trace with hash 263234121, now seen corresponding path program 2 times [2022-12-13 11:37:09,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:37:09,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [652137382] [2022-12-13 11:37:09,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:37:09,508 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:37:09,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:37:09,511 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:37:09,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:37:09,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:37:09,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:37:09,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 11:37:09,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:37:09,768 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:37:09,769 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 11:37:10,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:37:10,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:37:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:37:11,064 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:37:11,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [652137382] [2022-12-13 11:37:11,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [652137382] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:37:11,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:37:11,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-12-13 11:37:11,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736739416] [2022-12-13 11:37:11,065 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:37:11,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 11:37:11,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:37:11,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 11:37:11,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-12-13 11:37:20,490 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2022-12-13 11:37:20,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 58 transitions, 413 flow. Second operand has 18 states, 18 states have (on average 137.11111111111111) internal successors, (2468), 18 states have internal predecessors, (2468), 0 states have call successors, (0), 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 11:37:20,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:37:20,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2022-12-13 11:37:20,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:37:34,604 INFO L130 PetriNetUnfolder]: 30013/40935 cut-off events. [2022-12-13 11:37:34,604 INFO L131 PetriNetUnfolder]: For 107551/110368 co-relation queries the response was YES. [2022-12-13 11:37:34,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139351 conditions, 40935 events. 30013/40935 cut-off events. For 107551/110368 co-relation queries the response was YES. Maximal size of possible extension queue 1843. Compared 259142 event pairs, 9135 based on Foata normal form. 3123/35377 useless extension candidates. Maximal degree in co-relation 139311. Up to 15994 conditions per place. [2022-12-13 11:37:34,850 INFO L137 encePairwiseOnDemand]: 339/347 looper letters, 297 selfloop transitions, 24 changer transitions 0/324 dead transitions. [2022-12-13 11:37:34,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 324 transitions, 2437 flow [2022-12-13 11:37:34,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 11:37:34,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 11:37:34,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2810 transitions. [2022-12-13 11:37:34,857 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42620961625966935 [2022-12-13 11:37:34,857 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2810 transitions. [2022-12-13 11:37:34,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2810 transitions. [2022-12-13 11:37:34,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:37:34,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2810 transitions. [2022-12-13 11:37:34,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 147.89473684210526) internal successors, (2810), 19 states have internal predecessors, (2810), 0 states have call successors, (0), 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 11:37:34,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 347.0) internal successors, (6940), 20 states have internal predecessors, (6940), 0 states have call successors, (0), 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 11:37:34,866 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 347.0) internal successors, (6940), 20 states have internal predecessors, (6940), 0 states have call successors, (0), 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 11:37:34,866 INFO L175 Difference]: Start difference. First operand has 95 places, 58 transitions, 413 flow. Second operand 19 states and 2810 transitions. [2022-12-13 11:37:34,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 324 transitions, 2437 flow [2022-12-13 11:37:35,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 324 transitions, 2218 flow, removed 98 selfloop flow, removed 3 redundant places. [2022-12-13 11:37:35,022 INFO L231 Difference]: Finished difference. Result has 117 places, 70 transitions, 556 flow [2022-12-13 11:37:35,022 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=556, PETRI_PLACES=117, PETRI_TRANSITIONS=70} [2022-12-13 11:37:35,022 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 60 predicate places. [2022-12-13 11:37:35,023 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 70 transitions, 556 flow [2022-12-13 11:37:35,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 137.11111111111111) internal successors, (2468), 18 states have internal predecessors, (2468), 0 states have call successors, (0), 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 11:37:35,023 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:37:35,023 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:37:35,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:37:35,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:37:35,224 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 11:37:35,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:37:35,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1356719435, now seen corresponding path program 1 times [2022-12-13 11:37:35,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:37:35,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528890451] [2022-12-13 11:37:35,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:37:35,227 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 11:37:35,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:37:35,230 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:37:35,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:37:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:37:35,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 11:37:35,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:37:35,421 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:37:35,422 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 11:37:35,616 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 11:37:35,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:37:36,254 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 11:37:36,254 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:37:36,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528890451] [2022-12-13 11:37:36,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528890451] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:37:36,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:37:36,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 11:37:36,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317909578] [2022-12-13 11:37:36,255 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:37:36,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 11:37:36,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:37:36,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 11:37:36,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:37:40,901 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 347 [2022-12-13 11:37:40,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 70 transitions, 556 flow. Second operand has 10 states, 10 states have (on average 137.0) internal successors, (1370), 10 states have internal predecessors, (1370), 0 states have call successors, (0), 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 11:37:40,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:37:40,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 347 [2022-12-13 11:37:40,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:37:48,532 INFO L130 PetriNetUnfolder]: 27287/38781 cut-off events. [2022-12-13 11:37:48,533 INFO L131 PetriNetUnfolder]: For 139773/146580 co-relation queries the response was YES. [2022-12-13 11:37:48,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143638 conditions, 38781 events. 27287/38781 cut-off events. For 139773/146580 co-relation queries the response was YES. Maximal size of possible extension queue 1468. Compared 249360 event pairs, 17843 based on Foata normal form. 6807/40824 useless extension candidates. Maximal degree in co-relation 143591. Up to 22069 conditions per place. [2022-12-13 11:37:48,865 INFO L137 encePairwiseOnDemand]: 339/347 looper letters, 148 selfloop transitions, 15 changer transitions 0/168 dead transitions. [2022-12-13 11:37:48,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 168 transitions, 1392 flow [2022-12-13 11:37:48,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 11:37:48,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 11:37:48,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1590 transitions. [2022-12-13 11:37:48,869 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4165575058946817 [2022-12-13 11:37:48,869 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1590 transitions. [2022-12-13 11:37:48,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1590 transitions. [2022-12-13 11:37:48,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:37:48,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1590 transitions. [2022-12-13 11:37:48,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 144.54545454545453) internal successors, (1590), 11 states have internal predecessors, (1590), 0 states have call successors, (0), 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 11:37:48,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 347.0) internal successors, (4164), 12 states have internal predecessors, (4164), 0 states have call successors, (0), 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 11:37:48,874 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 347.0) internal successors, (4164), 12 states have internal predecessors, (4164), 0 states have call successors, (0), 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 11:37:48,874 INFO L175 Difference]: Start difference. First operand has 117 places, 70 transitions, 556 flow. Second operand 11 states and 1590 transitions. [2022-12-13 11:37:48,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 168 transitions, 1392 flow [2022-12-13 11:37:49,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 168 transitions, 1293 flow, removed 34 selfloop flow, removed 11 redundant places. [2022-12-13 11:37:49,081 INFO L231 Difference]: Finished difference. Result has 118 places, 74 transitions, 539 flow [2022-12-13 11:37:49,081 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=539, PETRI_PLACES=118, PETRI_TRANSITIONS=74} [2022-12-13 11:37:49,081 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 61 predicate places. [2022-12-13 11:37:49,082 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 74 transitions, 539 flow [2022-12-13 11:37:49,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 137.0) internal successors, (1370), 10 states have internal predecessors, (1370), 0 states have call successors, (0), 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 11:37:49,082 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:37:49,082 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:37:49,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:37:49,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:37:49,283 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 11:37:49,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:37:49,284 INFO L85 PathProgramCache]: Analyzing trace with hash -891366327, now seen corresponding path program 1 times [2022-12-13 11:37:49,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:37:49,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1423522121] [2022-12-13 11:37:49,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:37:49,286 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 11:37:49,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:37:49,289 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:37:49,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:37:49,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:37:49,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 11:37:49,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:37:49,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:37:49,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:37:49,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:37:49,770 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:37:49,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1423522121] [2022-12-13 11:37:49,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1423522121] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:37:49,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:37:49,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 11:37:49,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077133032] [2022-12-13 11:37:49,770 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:37:49,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:37:49,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:37:49,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:37:49,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:37:50,557 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 347 [2022-12-13 11:37:50,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 74 transitions, 539 flow. Second operand has 12 states, 12 states have (on average 143.83333333333334) internal successors, (1726), 12 states have internal predecessors, (1726), 0 states have call successors, (0), 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 11:37:50,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:37:50,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 347 [2022-12-13 11:37:50,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:37:56,175 INFO L130 PetriNetUnfolder]: 21755/30859 cut-off events. [2022-12-13 11:37:56,175 INFO L131 PetriNetUnfolder]: For 112065/117624 co-relation queries the response was YES. [2022-12-13 11:37:56,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123938 conditions, 30859 events. 21755/30859 cut-off events. For 112065/117624 co-relation queries the response was YES. Maximal size of possible extension queue 1122. Compared 191190 event pairs, 11742 based on Foata normal form. 5647/34869 useless extension candidates. Maximal degree in co-relation 123893. Up to 22588 conditions per place. [2022-12-13 11:37:56,395 INFO L137 encePairwiseOnDemand]: 339/347 looper letters, 143 selfloop transitions, 12 changer transitions 0/160 dead transitions. [2022-12-13 11:37:56,395 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 160 transitions, 1335 flow [2022-12-13 11:37:56,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 11:37:56,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 11:37:56,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1502 transitions. [2022-12-13 11:37:56,398 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4328530259365994 [2022-12-13 11:37:56,398 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1502 transitions. [2022-12-13 11:37:56,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1502 transitions. [2022-12-13 11:37:56,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:37:56,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1502 transitions. [2022-12-13 11:37:56,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 150.2) internal successors, (1502), 10 states have internal predecessors, (1502), 0 states have call successors, (0), 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 11:37:56,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 347.0) internal successors, (3817), 11 states have internal predecessors, (3817), 0 states have call successors, (0), 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 11:37:56,403 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 347.0) internal successors, (3817), 11 states have internal predecessors, (3817), 0 states have call successors, (0), 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 11:37:56,403 INFO L175 Difference]: Start difference. First operand has 118 places, 74 transitions, 539 flow. Second operand 10 states and 1502 transitions. [2022-12-13 11:37:56,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 160 transitions, 1335 flow [2022-12-13 11:37:56,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 160 transitions, 1314 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-12-13 11:37:56,727 INFO L231 Difference]: Finished difference. Result has 124 places, 75 transitions, 558 flow [2022-12-13 11:37:56,727 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=558, PETRI_PLACES=124, PETRI_TRANSITIONS=75} [2022-12-13 11:37:56,727 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 67 predicate places. [2022-12-13 11:37:56,727 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 75 transitions, 558 flow [2022-12-13 11:37:56,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 143.83333333333334) internal successors, (1726), 12 states have internal predecessors, (1726), 0 states have call successors, (0), 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 11:37:56,728 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:37:56,728 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:37:56,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:37:56,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:37:56,929 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 11:37:56,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:37:56,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1939101841, now seen corresponding path program 2 times [2022-12-13 11:37:56,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:37:56,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586427014] [2022-12-13 11:37:56,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:37:56,931 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 11:37:56,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:37:56,934 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:37:56,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:37:57,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:37:57,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:37:57,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 11:37:57,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:37:57,178 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:37:57,178 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 11:37:57,531 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:37:57,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:37:58,642 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:37:58,643 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:37:58,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586427014] [2022-12-13 11:37:58,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586427014] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:37:58,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:37:58,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-12-13 11:37:58,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46155552] [2022-12-13 11:37:58,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:37:58,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 11:37:58,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:37:58,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 11:37:58,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-12-13 11:38:07,936 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 347 [2022-12-13 11:38:07,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 75 transitions, 558 flow. Second operand has 18 states, 18 states have (on average 135.33333333333334) internal successors, (2436), 18 states have internal predecessors, (2436), 0 states have call successors, (0), 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 11:38:07,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:38:07,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 347 [2022-12-13 11:38:07,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:38:25,638 INFO L130 PetriNetUnfolder]: 25273/34866 cut-off events. [2022-12-13 11:38:25,638 INFO L131 PetriNetUnfolder]: For 130444/134150 co-relation queries the response was YES. [2022-12-13 11:38:25,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154000 conditions, 34866 events. 25273/34866 cut-off events. For 130444/134150 co-relation queries the response was YES. Maximal size of possible extension queue 1634. Compared 221863 event pairs, 8306 based on Foata normal form. 3908/35484 useless extension candidates. Maximal degree in co-relation 153953. Up to 15532 conditions per place. [2022-12-13 11:38:26,034 INFO L137 encePairwiseOnDemand]: 339/347 looper letters, 319 selfloop transitions, 24 changer transitions 0/349 dead transitions. [2022-12-13 11:38:26,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 349 transitions, 2921 flow [2022-12-13 11:38:26,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 11:38:26,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 11:38:26,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2766 transitions. [2022-12-13 11:38:26,041 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41953587137873505 [2022-12-13 11:38:26,041 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2766 transitions. [2022-12-13 11:38:26,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2766 transitions. [2022-12-13 11:38:26,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:38:26,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2766 transitions. [2022-12-13 11:38:26,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 145.57894736842104) internal successors, (2766), 19 states have internal predecessors, (2766), 0 states have call successors, (0), 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 11:38:26,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 347.0) internal successors, (6940), 20 states have internal predecessors, (6940), 0 states have call successors, (0), 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 11:38:26,052 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 347.0) internal successors, (6940), 20 states have internal predecessors, (6940), 0 states have call successors, (0), 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 11:38:26,053 INFO L175 Difference]: Start difference. First operand has 124 places, 75 transitions, 558 flow. Second operand 19 states and 2766 transitions. [2022-12-13 11:38:26,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 349 transitions, 2921 flow [2022-12-13 11:38:26,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 349 transitions, 2902 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-12-13 11:38:26,720 INFO L231 Difference]: Finished difference. Result has 143 places, 87 transitions, 698 flow [2022-12-13 11:38:26,721 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=698, PETRI_PLACES=143, PETRI_TRANSITIONS=87} [2022-12-13 11:38:26,721 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 86 predicate places. [2022-12-13 11:38:26,721 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 87 transitions, 698 flow [2022-12-13 11:38:26,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 135.33333333333334) internal successors, (2436), 18 states have internal predecessors, (2436), 0 states have call successors, (0), 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 11:38:26,721 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:38:26,721 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-12-13 11:38:26,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:38:26,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:38:26,922 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 11:38:26,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:38:26,923 INFO L85 PathProgramCache]: Analyzing trace with hash 418195117, now seen corresponding path program 3 times [2022-12-13 11:38:26,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:38:26,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886893353] [2022-12-13 11:38:26,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:38:26,925 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 11:38:26,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:38:26,928 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:38:26,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:38:27,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 11:38:27,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:38:27,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 11:38:27,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:38:27,251 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:38:27,252 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 11:38:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:27,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:38:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:38:30,212 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:38:30,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886893353] [2022-12-13 11:38:30,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1886893353] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:38:30,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:38:30,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 11:38:30,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491089348] [2022-12-13 11:38:30,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:38:30,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 11:38:30,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:38:30,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 11:38:30,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-12-13 11:38:47,654 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 347 [2022-12-13 11:38:47,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 87 transitions, 698 flow. Second operand has 24 states, 24 states have (on average 146.0) internal successors, (3504), 24 states have internal predecessors, (3504), 0 states have call successors, (0), 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 11:38:47,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:38:47,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 347 [2022-12-13 11:38:47,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:39:20,177 INFO L130 PetriNetUnfolder]: 63467/87425 cut-off events. [2022-12-13 11:39:20,178 INFO L131 PetriNetUnfolder]: For 425307/440409 co-relation queries the response was YES. [2022-12-13 11:39:20,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414259 conditions, 87425 events. 63467/87425 cut-off events. For 425307/440409 co-relation queries the response was YES. Maximal size of possible extension queue 2186. Compared 571057 event pairs, 41701 based on Foata normal form. 15114/94317 useless extension candidates. Maximal degree in co-relation 414206. Up to 25269 conditions per place. [2022-12-13 11:39:20,953 INFO L137 encePairwiseOnDemand]: 343/347 looper letters, 716 selfloop transitions, 24 changer transitions 0/749 dead transitions. [2022-12-13 11:39:20,953 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 749 transitions, 6579 flow [2022-12-13 11:39:20,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 11:39:20,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 11:39:20,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3976 transitions. [2022-12-13 11:39:20,959 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47742555235350626 [2022-12-13 11:39:20,959 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3976 transitions. [2022-12-13 11:39:20,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3976 transitions. [2022-12-13 11:39:20,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:39:20,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3976 transitions. [2022-12-13 11:39:20,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 165.66666666666666) internal successors, (3976), 24 states have internal predecessors, (3976), 0 states have call successors, (0), 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 11:39:20,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 347.0) internal successors, (8675), 25 states have internal predecessors, (8675), 0 states have call successors, (0), 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 11:39:20,969 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 347.0) internal successors, (8675), 25 states have internal predecessors, (8675), 0 states have call successors, (0), 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 11:39:20,969 INFO L175 Difference]: Start difference. First operand has 143 places, 87 transitions, 698 flow. Second operand 24 states and 3976 transitions. [2022-12-13 11:39:20,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 749 transitions, 6579 flow [2022-12-13 11:39:24,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 749 transitions, 6517 flow, removed 24 selfloop flow, removed 5 redundant places. [2022-12-13 11:39:24,619 INFO L231 Difference]: Finished difference. Result has 174 places, 100 transitions, 829 flow [2022-12-13 11:39:24,619 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=829, PETRI_PLACES=174, PETRI_TRANSITIONS=100} [2022-12-13 11:39:24,619 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 117 predicate places. [2022-12-13 11:39:24,620 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 100 transitions, 829 flow [2022-12-13 11:39:24,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 146.0) internal successors, (3504), 24 states have internal predecessors, (3504), 0 states have call successors, (0), 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 11:39:24,620 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:39:24,620 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:39:24,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:39:24,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:39:24,821 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 11:39:24,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:39:24,822 INFO L85 PathProgramCache]: Analyzing trace with hash -902303238, now seen corresponding path program 2 times [2022-12-13 11:39:24,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:39:24,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1662207491] [2022-12-13 11:39:24,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:39:24,823 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 11:39:24,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:39:24,826 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:39:24,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:39:25,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:39:25,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:39:25,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 11:39:25,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:39:25,168 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:39:25,168 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 11:39:25,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:25,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:39:27,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:39:27,151 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:39:27,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1662207491] [2022-12-13 11:39:27,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1662207491] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:39:27,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:39:27,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-12-13 11:39:27,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008300426] [2022-12-13 11:39:27,152 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:39:27,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 11:39:27,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:39:27,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 11:39:27,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-12-13 11:39:40,003 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 347 [2022-12-13 11:39:40,004 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 100 transitions, 829 flow. Second operand has 14 states, 14 states have (on average 135.71428571428572) internal successors, (1900), 14 states have internal predecessors, (1900), 0 states have call successors, (0), 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 11:39:40,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:39:40,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 347 [2022-12-13 11:39:40,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:40:00,818 INFO L130 PetriNetUnfolder]: 64177/90237 cut-off events. [2022-12-13 11:40:00,818 INFO L131 PetriNetUnfolder]: For 457819/474111 co-relation queries the response was YES. [2022-12-13 11:40:01,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413485 conditions, 90237 events. 64177/90237 cut-off events. For 457819/474111 co-relation queries the response was YES. Maximal size of possible extension queue 1949. Compared 595679 event pairs, 29705 based on Foata normal form. 16692/102197 useless extension candidates. Maximal degree in co-relation 413418. Up to 46260 conditions per place. [2022-12-13 11:40:01,924 INFO L137 encePairwiseOnDemand]: 339/347 looper letters, 396 selfloop transitions, 25 changer transitions 0/427 dead transitions. [2022-12-13 11:40:01,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 427 transitions, 3920 flow [2022-12-13 11:40:01,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 11:40:01,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 11:40:01,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2737 transitions. [2022-12-13 11:40:01,932 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41513726679811924 [2022-12-13 11:40:01,932 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2737 transitions. [2022-12-13 11:40:01,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2737 transitions. [2022-12-13 11:40:01,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:40:01,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2737 transitions. [2022-12-13 11:40:01,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 144.05263157894737) internal successors, (2737), 19 states have internal predecessors, (2737), 0 states have call successors, (0), 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 11:40:01,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 347.0) internal successors, (6940), 20 states have internal predecessors, (6940), 0 states have call successors, (0), 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 11:40:01,942 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 347.0) internal successors, (6940), 20 states have internal predecessors, (6940), 0 states have call successors, (0), 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 11:40:01,942 INFO L175 Difference]: Start difference. First operand has 174 places, 100 transitions, 829 flow. Second operand 19 states and 2737 transitions. [2022-12-13 11:40:01,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 427 transitions, 3920 flow [2022-12-13 11:40:05,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 427 transitions, 3896 flow, removed 1 selfloop flow, removed 10 redundant places. [2022-12-13 11:40:05,717 INFO L231 Difference]: Finished difference. Result has 186 places, 111 transitions, 980 flow [2022-12-13 11:40:05,718 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=980, PETRI_PLACES=186, PETRI_TRANSITIONS=111} [2022-12-13 11:40:05,718 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 129 predicate places. [2022-12-13 11:40:05,718 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 111 transitions, 980 flow [2022-12-13 11:40:05,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 135.71428571428572) internal successors, (1900), 14 states have internal predecessors, (1900), 0 states have call successors, (0), 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 11:40:05,718 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:40:05,718 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2022-12-13 11:40:05,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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)] Ended with exit code 0 [2022-12-13 11:40:05,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:40:05,919 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 11:40:05,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:40:05,920 INFO L85 PathProgramCache]: Analyzing trace with hash -440610749, now seen corresponding path program 3 times [2022-12-13 11:40:05,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:40:05,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [984650574] [2022-12-13 11:40:05,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:40:05,920 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 11:40:05,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:40:05,921 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:40:05,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:40:06,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 11:40:06,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:40:06,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 11:40:06,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:40:06,213 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:40:06,214 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 11:40:06,529 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:40:06,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:40:06,541 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 8 treesize of output 6 [2022-12-13 11:40:06,557 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 11:40:06,558 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 11:40:07,767 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:40:07,768 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:40:07,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [984650574] [2022-12-13 11:40:07,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [984650574] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:40:07,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:40:07,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-12-13 11:40:07,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956006518] [2022-12-13 11:40:07,768 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:40:07,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 11:40:07,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:40:07,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 11:40:07,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-12-13 11:40:16,564 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 347 [2022-12-13 11:40:16,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 111 transitions, 980 flow. Second operand has 20 states, 20 states have (on average 141.15) internal successors, (2823), 20 states have internal predecessors, (2823), 0 states have call successors, (0), 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 11:40:16,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:40:16,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 347 [2022-12-13 11:40:16,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:40:43,421 INFO L130 PetriNetUnfolder]: 69901/96580 cut-off events. [2022-12-13 11:40:43,421 INFO L131 PetriNetUnfolder]: For 691003/700850 co-relation queries the response was YES. [2022-12-13 11:40:44,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 502260 conditions, 96580 events. 69901/96580 cut-off events. For 691003/700850 co-relation queries the response was YES. Maximal size of possible extension queue 2552. Compared 654543 event pairs, 32957 based on Foata normal form. 10277/104965 useless extension candidates. Maximal degree in co-relation 502188. Up to 69255 conditions per place. [2022-12-13 11:40:44,571 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 445 selfloop transitions, 27 changer transitions 0/480 dead transitions. [2022-12-13 11:40:44,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 480 transitions, 4422 flow [2022-12-13 11:40:44,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 11:40:44,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 11:40:44,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3181 transitions. [2022-12-13 11:40:44,577 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43653080828873336 [2022-12-13 11:40:44,577 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3181 transitions. [2022-12-13 11:40:44,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3181 transitions. [2022-12-13 11:40:44,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:40:44,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3181 transitions. [2022-12-13 11:40:44,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 151.47619047619048) internal successors, (3181), 21 states have internal predecessors, (3181), 0 states have call successors, (0), 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 11:40:44,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 347.0) internal successors, (7634), 22 states have internal predecessors, (7634), 0 states have call successors, (0), 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 11:40:44,585 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 347.0) internal successors, (7634), 22 states have internal predecessors, (7634), 0 states have call successors, (0), 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 11:40:44,585 INFO L175 Difference]: Start difference. First operand has 186 places, 111 transitions, 980 flow. Second operand 21 states and 3181 transitions. [2022-12-13 11:40:44,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 480 transitions, 4422 flow [2022-12-13 11:40:49,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 480 transitions, 4315 flow, removed 42 selfloop flow, removed 9 redundant places. [2022-12-13 11:40:49,394 INFO L231 Difference]: Finished difference. Result has 204 places, 118 transitions, 1099 flow [2022-12-13 11:40:49,394 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=919, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1099, PETRI_PLACES=204, PETRI_TRANSITIONS=118} [2022-12-13 11:40:49,394 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 147 predicate places. [2022-12-13 11:40:49,394 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 118 transitions, 1099 flow [2022-12-13 11:40:49,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 141.15) internal successors, (2823), 20 states have internal predecessors, (2823), 0 states have call successors, (0), 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 11:40:49,395 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:40:49,395 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:40:49,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:40:49,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:40:49,596 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 11:40:49,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:40:49,597 INFO L85 PathProgramCache]: Analyzing trace with hash -517635174, now seen corresponding path program 2 times [2022-12-13 11:40:49,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:40:49,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1356609908] [2022-12-13 11:40:49,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:40:49,599 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 11:40:49,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:40:49,601 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:40:49,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:40:49,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 11:40:49,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:40:49,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 11:40:49,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:40:49,928 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:40:49,928 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 11:40:50,108 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 11:40:50,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:40:50,109 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:40:50,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1356609908] [2022-12-13 11:40:50,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1356609908] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:40:50,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:40:50,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:40:50,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258608565] [2022-12-13 11:40:50,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:40:50,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:40:50,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:40:50,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:40:50,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:40:50,505 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 347 [2022-12-13 11:40:50,506 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 118 transitions, 1099 flow. Second operand has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 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 11:40:50,506 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:40:50,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 347 [2022-12-13 11:40:50,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:41:05,001 INFO L130 PetriNetUnfolder]: 67125/94577 cut-off events. [2022-12-13 11:41:05,002 INFO L131 PetriNetUnfolder]: For 708604/725940 co-relation queries the response was YES. [2022-12-13 11:41:05,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 487432 conditions, 94577 events. 67125/94577 cut-off events. For 708604/725940 co-relation queries the response was YES. Maximal size of possible extension queue 1963. Compared 630742 event pairs, 41073 based on Foata normal form. 25656/120132 useless extension candidates. Maximal degree in co-relation 487354. Up to 78587 conditions per place. [2022-12-13 11:41:06,138 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 143 selfloop transitions, 19 changer transitions 0/170 dead transitions. [2022-12-13 11:41:06,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 170 transitions, 1871 flow [2022-12-13 11:41:06,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:41:06,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:41:06,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 740 transitions. [2022-12-13 11:41:06,140 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4265129682997118 [2022-12-13 11:41:06,141 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 740 transitions. [2022-12-13 11:41:06,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 740 transitions. [2022-12-13 11:41:06,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:41:06,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 740 transitions. [2022-12-13 11:41:06,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 148.0) internal successors, (740), 5 states have internal predecessors, (740), 0 states have call successors, (0), 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 11:41:06,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 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 11:41:06,143 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 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 11:41:06,143 INFO L175 Difference]: Start difference. First operand has 204 places, 118 transitions, 1099 flow. Second operand 5 states and 740 transitions. [2022-12-13 11:41:06,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 170 transitions, 1871 flow [2022-12-13 11:41:11,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 170 transitions, 1835 flow, removed 8 selfloop flow, removed 7 redundant places. [2022-12-13 11:41:11,184 INFO L231 Difference]: Finished difference. Result has 201 places, 118 transitions, 1124 flow [2022-12-13 11:41:11,184 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=1058, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1124, PETRI_PLACES=201, PETRI_TRANSITIONS=118} [2022-12-13 11:41:11,184 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 144 predicate places. [2022-12-13 11:41:11,184 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 118 transitions, 1124 flow [2022-12-13 11:41:11,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 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 11:41:11,185 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:41:11,185 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-12-13 11:41:11,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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)] Ended with exit code 0 [2022-12-13 11:41:11,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:41:11,386 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 11:41:11,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:41:11,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1611120488, now seen corresponding path program 4 times [2022-12-13 11:41:11,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:41:11,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2006040272] [2022-12-13 11:41:11,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:41:11,388 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 11:41:11,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:41:11,391 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:41:11,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:41:11,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:41:11,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:41:11,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 11:41:11,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:41:11,610 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:41:11,610 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 11:41:11,928 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:41:11,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:41:13,660 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:41:13,660 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:41:13,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2006040272] [2022-12-13 11:41:13,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2006040272] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:41:13,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:41:13,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 11:41:13,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510003665] [2022-12-13 11:41:13,661 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:41:13,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 11:41:13,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:41:13,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 11:41:13,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-12-13 11:41:28,182 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 347 [2022-12-13 11:41:28,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 118 transitions, 1124 flow. Second operand has 24 states, 24 states have (on average 139.08333333333334) internal successors, (3338), 24 states have internal predecessors, (3338), 0 states have call successors, (0), 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 11:41:28,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:41:28,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 347 [2022-12-13 11:41:28,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:42:10,605 INFO L130 PetriNetUnfolder]: 90365/125111 cut-off events. [2022-12-13 11:42:10,605 INFO L131 PetriNetUnfolder]: For 1133694/1163919 co-relation queries the response was YES. [2022-12-13 11:42:11,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 694740 conditions, 125111 events. 90365/125111 cut-off events. For 1133694/1163919 co-relation queries the response was YES. Maximal size of possible extension queue 2383. Compared 843255 event pairs, 9643 based on Foata normal form. 46499/171438 useless extension candidates. Maximal degree in co-relation 694660. Up to 26536 conditions per place. [2022-12-13 11:42:12,156 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 699 selfloop transitions, 50 changer transitions 0/757 dead transitions. [2022-12-13 11:42:12,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 757 transitions, 7115 flow [2022-12-13 11:42:12,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 11:42:12,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-13 11:42:12,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5533 transitions. [2022-12-13 11:42:12,164 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4309525663992523 [2022-12-13 11:42:12,164 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5533 transitions. [2022-12-13 11:42:12,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5533 transitions. [2022-12-13 11:42:12,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:42:12,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5533 transitions. [2022-12-13 11:42:12,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 149.54054054054055) internal successors, (5533), 37 states have internal predecessors, (5533), 0 states have call successors, (0), 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 11:42:12,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 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 11:42:12,178 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 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 11:42:12,178 INFO L175 Difference]: Start difference. First operand has 201 places, 118 transitions, 1124 flow. Second operand 37 states and 5533 transitions. [2022-12-13 11:42:12,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 757 transitions, 7115 flow [2022-12-13 11:42:18,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 757 transitions, 6803 flow, removed 105 selfloop flow, removed 6 redundant places. [2022-12-13 11:42:18,773 INFO L231 Difference]: Finished difference. Result has 237 places, 129 transitions, 1282 flow [2022-12-13 11:42:18,773 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=1018, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1282, PETRI_PLACES=237, PETRI_TRANSITIONS=129} [2022-12-13 11:42:18,773 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 180 predicate places. [2022-12-13 11:42:18,773 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 129 transitions, 1282 flow [2022-12-13 11:42:18,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 139.08333333333334) internal successors, (3338), 24 states have internal predecessors, (3338), 0 states have call successors, (0), 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 11:42:18,774 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:42:18,774 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:42:18,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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)] Ended with exit code 0 [2022-12-13 11:42:18,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:42:18,975 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 11:42:18,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:42:18,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1937819371, now seen corresponding path program 3 times [2022-12-13 11:42:18,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:42:18,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1577322676] [2022-12-13 11:42:18,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:42:18,978 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 11:42:18,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:42:18,980 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:42:18,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:42:19,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 11:42:19,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:42:19,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 11:42:19,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:42:19,342 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:42:19,342 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 11:42:19,387 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 15 treesize of output 11 [2022-12-13 11:42:19,535 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 11:42:19,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:42:19,894 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 11:42:19,894 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:42:19,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1577322676] [2022-12-13 11:42:19,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1577322676] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:42:19,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:42:19,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-12-13 11:42:19,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513988161] [2022-12-13 11:42:19,894 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:42:19,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 11:42:19,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:42:19,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 11:42:19,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-12-13 11:42:23,814 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2022-12-13 11:42:23,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 129 transitions, 1282 flow. Second operand has 14 states, 14 states have (on average 137.57142857142858) internal successors, (1926), 14 states have internal predecessors, (1926), 0 states have call successors, (0), 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 11:42:23,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:42:23,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2022-12-13 11:42:23,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:42:47,211 INFO L130 PetriNetUnfolder]: 91946/126993 cut-off events. [2022-12-13 11:42:47,212 INFO L131 PetriNetUnfolder]: For 1196202/1223693 co-relation queries the response was YES. [2022-12-13 11:42:48,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 710043 conditions, 126993 events. 91946/126993 cut-off events. For 1196202/1223693 co-relation queries the response was YES. Maximal size of possible extension queue 2239. Compared 834136 event pairs, 40581 based on Foata normal form. 27543/154415 useless extension candidates. Maximal degree in co-relation 709960. Up to 76579 conditions per place. [2022-12-13 11:42:48,988 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 230 selfloop transitions, 21 changer transitions 0/261 dead transitions. [2022-12-13 11:42:48,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 261 transitions, 2697 flow [2022-12-13 11:42:48,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 11:42:48,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 11:42:48,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2034 transitions. [2022-12-13 11:42:48,991 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41869081926718815 [2022-12-13 11:42:48,991 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2034 transitions. [2022-12-13 11:42:48,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2034 transitions. [2022-12-13 11:42:48,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:42:48,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2034 transitions. [2022-12-13 11:42:48,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 145.28571428571428) internal successors, (2034), 14 states have internal predecessors, (2034), 0 states have call successors, (0), 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 11:42:48,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 347.0) internal successors, (5205), 15 states have internal predecessors, (5205), 0 states have call successors, (0), 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 11:42:48,997 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 347.0) internal successors, (5205), 15 states have internal predecessors, (5205), 0 states have call successors, (0), 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 11:42:48,997 INFO L175 Difference]: Start difference. First operand has 237 places, 129 transitions, 1282 flow. Second operand 14 states and 2034 transitions. [2022-12-13 11:42:48,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 261 transitions, 2697 flow [2022-12-13 11:43:18,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 261 transitions, 2254 flow, removed 95 selfloop flow, removed 28 redundant places. [2022-12-13 11:43:18,979 INFO L231 Difference]: Finished difference. Result has 226 places, 133 transitions, 1153 flow [2022-12-13 11:43:18,979 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=1055, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1153, PETRI_PLACES=226, PETRI_TRANSITIONS=133} [2022-12-13 11:43:18,980 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 169 predicate places. [2022-12-13 11:43:18,980 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 133 transitions, 1153 flow [2022-12-13 11:43:18,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 137.57142857142858) internal successors, (1926), 14 states have internal predecessors, (1926), 0 states have call successors, (0), 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 11:43:18,980 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:43:18,980 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:43:18,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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)] Forceful destruction successful, exit code 0 [2022-12-13 11:43:19,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:43:19,182 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 11:43:19,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:43:19,183 INFO L85 PathProgramCache]: Analyzing trace with hash 172937963, now seen corresponding path program 3 times [2022-12-13 11:43:19,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:43:19,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1356756602] [2022-12-13 11:43:19,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:43:19,184 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 11:43:19,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:43:19,187 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:43:19,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:43:19,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 11:43:19,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:43:19,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 11:43:19,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:43:19,641 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:43:19,641 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 11:43:20,000 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 7 treesize of output 5 [2022-12-13 11:43:20,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 90 [2022-12-13 11:43:20,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 11:43:20,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:43:20,601 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 8 treesize of output 6 [2022-12-13 11:43:20,714 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 11:43:22,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 11:43:22,824 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:43:22,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1356756602] [2022-12-13 11:43:22,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1356756602] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:43:22,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:43:22,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 11:43:22,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604444198] [2022-12-13 11:43:22,825 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:43:22,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:43:22,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:43:22,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:43:22,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:43:26,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:43:35,383 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 347 [2022-12-13 11:43:35,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 133 transitions, 1153 flow. Second operand has 12 states, 12 states have (on average 130.0) internal successors, (1560), 12 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:43:35,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:43:35,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 347 [2022-12-13 11:43:35,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:43:38,601 WARN L539 Checker$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 11:43:40,861 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 11:44:06,496 INFO L130 PetriNetUnfolder]: 115291/159455 cut-off events. [2022-12-13 11:44:06,497 INFO L131 PetriNetUnfolder]: For 1323860/1343822 co-relation queries the response was YES. [2022-12-13 11:44:07,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 801331 conditions, 159455 events. 115291/159455 cut-off events. For 1323860/1343822 co-relation queries the response was YES. Maximal size of possible extension queue 2851. Compared 1089283 event pairs, 17415 based on Foata normal form. 31550/190904 useless extension candidates. Maximal degree in co-relation 801250. Up to 53176 conditions per place. [2022-12-13 11:44:08,598 INFO L137 encePairwiseOnDemand]: 342/347 looper letters, 302 selfloop transitions, 21 changer transitions 0/332 dead transitions. [2022-12-13 11:44:08,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 332 transitions, 3352 flow [2022-12-13 11:44:08,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 11:44:08,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 11:44:08,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 961 transitions. [2022-12-13 11:44:08,602 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39563606422396047 [2022-12-13 11:44:08,602 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 961 transitions. [2022-12-13 11:44:08,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 961 transitions. [2022-12-13 11:44:08,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:44:08,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 961 transitions. [2022-12-13 11:44:08,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 137.28571428571428) internal successors, (961), 7 states have internal predecessors, (961), 0 states have call successors, (0), 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 11:44:08,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 347.0) internal successors, (2776), 8 states have internal predecessors, (2776), 0 states have call successors, (0), 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 11:44:08,605 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 347.0) internal successors, (2776), 8 states have internal predecessors, (2776), 0 states have call successors, (0), 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 11:44:08,605 INFO L175 Difference]: Start difference. First operand has 226 places, 133 transitions, 1153 flow. Second operand 7 states and 961 transitions. [2022-12-13 11:44:08,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 332 transitions, 3352 flow [2022-12-13 11:44:51,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 332 transitions, 3334 flow, removed 3 selfloop flow, removed 6 redundant places. [2022-12-13 11:44:51,567 INFO L231 Difference]: Finished difference. Result has 226 places, 133 transitions, 1188 flow [2022-12-13 11:44:51,567 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=1127, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1188, PETRI_PLACES=226, PETRI_TRANSITIONS=133} [2022-12-13 11:44:51,567 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 169 predicate places. [2022-12-13 11:44:51,568 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 133 transitions, 1188 flow [2022-12-13 11:44:51,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 130.0) internal successors, (1560), 12 states have internal predecessors, (1560), 0 states have call successors, (0), 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 11:44:51,568 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:44:51,568 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:44:51,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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)] Ended with exit code 0 [2022-12-13 11:44:51,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:44:51,769 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 11:44:51,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:44:51,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1341820476, now seen corresponding path program 4 times [2022-12-13 11:44:51,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:44:51,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [190168002] [2022-12-13 11:44:51,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:44:51,772 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 11:44:51,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:44:51,774 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:44:51,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 (29)] Waiting until timeout for monitored process [2022-12-13 11:44:51,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:44:51,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:44:51,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 11:44:51,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:44:52,024 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:44:52,024 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 11:44:52,590 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:44:52,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:44:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:44:54,587 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:44:54,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [190168002] [2022-12-13 11:44:54,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [190168002] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:44:54,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:44:54,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 11:44:54,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247808509] [2022-12-13 11:44:54,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:44:54,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 11:44:54,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:44:54,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 11:44:54,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-12-13 11:45:18,116 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 347 [2022-12-13 11:45:18,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 133 transitions, 1188 flow. Second operand has 23 states, 23 states have (on average 135.30434782608697) internal successors, (3112), 23 states have internal predecessors, (3112), 0 states have call successors, (0), 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 11:45:18,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:45:18,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 347 [2022-12-13 11:45:18,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:46:07,794 INFO L130 PetriNetUnfolder]: 113882/157874 cut-off events. [2022-12-13 11:46:07,794 INFO L131 PetriNetUnfolder]: For 1460668/1483829 co-relation queries the response was YES. [2022-12-13 11:46:09,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 823765 conditions, 157874 events. 113882/157874 cut-off events. For 1460668/1483829 co-relation queries the response was YES. Maximal size of possible extension queue 2867. Compared 1075197 event pairs, 40540 based on Foata normal form. 23955/181803 useless extension candidates. Maximal degree in co-relation 823683. Up to 68982 conditions per place. [2022-12-13 11:46:09,942 INFO L137 encePairwiseOnDemand]: 339/347 looper letters, 719 selfloop transitions, 39 changer transitions 0/768 dead transitions. [2022-12-13 11:46:09,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 768 transitions, 7298 flow [2022-12-13 11:46:09,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 11:46:09,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-13 11:46:09,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4630 transitions. [2022-12-13 11:46:09,950 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41696685878962536 [2022-12-13 11:46:09,950 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4630 transitions. [2022-12-13 11:46:09,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4630 transitions. [2022-12-13 11:46:09,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:46:09,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4630 transitions. [2022-12-13 11:46:09,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 144.6875) internal successors, (4630), 32 states have internal predecessors, (4630), 0 states have call successors, (0), 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 11:46:09,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 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 11:46:09,963 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 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 11:46:09,963 INFO L175 Difference]: Start difference. First operand has 226 places, 133 transitions, 1188 flow. Second operand 32 states and 4630 transitions. [2022-12-13 11:46:09,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 768 transitions, 7298 flow [2022-12-13 11:47:02,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 768 transitions, 7171 flow, removed 30 selfloop flow, removed 6 redundant places. [2022-12-13 11:47:02,310 INFO L231 Difference]: Finished difference. Result has 255 places, 143 transitions, 1376 flow [2022-12-13 11:47:02,311 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1376, PETRI_PLACES=255, PETRI_TRANSITIONS=143} [2022-12-13 11:47:02,311 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 198 predicate places. [2022-12-13 11:47:02,311 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 143 transitions, 1376 flow [2022-12-13 11:47:02,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 135.30434782608697) internal successors, (3112), 23 states have internal predecessors, (3112), 0 states have call successors, (0), 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 11:47:02,311 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:47:02,312 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:47:02,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 (29)] Forceful destruction successful, exit code 0 [2022-12-13 11:47:02,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:47:02,512 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 11:47:02,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:47:02,512 INFO L85 PathProgramCache]: Analyzing trace with hash 275619616, now seen corresponding path program 5 times [2022-12-13 11:47:02,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:47:02,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [764445177] [2022-12-13 11:47:02,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:47:02,513 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 11:47:02,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:47:02,513 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 11:47:02,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f535f8a-b674-4ea6-a2cf-1752103d1344/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 (30)] Waiting until timeout for monitored process [2022-12-13 11:47:02,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 11:47:02,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:47:02,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 11:47:02,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:47:02,817 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 11:47:02,818 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 11:47:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:03,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:47:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:05,754 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:47:05,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [764445177] [2022-12-13 11:47:05,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [764445177] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:47:05,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:47:05,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 11:47:05,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403478547] [2022-12-13 11:47:05,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:47:05,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 11:47:05,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:47:05,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 11:47:05,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-12-13 11:47:24,118 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 347 [2022-12-13 11:47:24,120 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 143 transitions, 1376 flow. Second operand has 24 states, 24 states have (on average 136.25) internal successors, (3270), 24 states have internal predecessors, (3270), 0 states have call successors, (0), 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 11:47:24,120 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:47:24,120 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 347 [2022-12-13 11:47:24,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:48:33,625 INFO L130 PetriNetUnfolder]: 190450/258844 cut-off events. [2022-12-13 11:48:33,625 INFO L131 PetriNetUnfolder]: For 2314457/2350795 co-relation queries the response was YES. [2022-12-13 11:48:36,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1445094 conditions, 258844 events. 190450/258844 cut-off events. For 2314457/2350795 co-relation queries the response was YES. Maximal size of possible extension queue 4348. Compared 1762131 event pairs, 18208 based on Foata normal form. 55360/314109 useless extension candidates. Maximal degree in co-relation 1445007. Up to 53621 conditions per place. [2022-12-13 11:48:37,779 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 708 selfloop transitions, 55 changer transitions 0/773 dead transitions. [2022-12-13 11:48:37,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 773 transitions, 7290 flow [2022-12-13 11:48:37,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 11:48:37,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-13 11:48:37,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4813 transitions. [2022-12-13 11:48:37,784 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.420312636450965 [2022-12-13 11:48:37,784 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4813 transitions. [2022-12-13 11:48:37,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4813 transitions. [2022-12-13 11:48:37,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:48:37,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4813 transitions. [2022-12-13 11:48:37,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 145.84848484848484) internal successors, (4813), 33 states have internal predecessors, (4813), 0 states have call successors, (0), 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 11:48:37,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 347.0) internal successors, (11798), 34 states have internal predecessors, (11798), 0 states have call successors, (0), 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 11:48:37,796 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 347.0) internal successors, (11798), 34 states have internal predecessors, (11798), 0 states have call successors, (0), 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 11:48:37,797 INFO L175 Difference]: Start difference. First operand has 255 places, 143 transitions, 1376 flow. Second operand 33 states and 4813 transitions. [2022-12-13 11:48:37,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 773 transitions, 7290 flow