./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-counter-fun.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_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/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_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/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_6fd783ad-9ac3-4701-910f-27adbe72ac71/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 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 --- 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 17:44:32,220 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:44:32,221 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:44:32,233 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:44:32,233 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:44:32,234 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:44:32,235 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:44:32,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:44:32,237 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:44:32,237 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:44:32,238 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:44:32,238 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:44:32,239 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:44:32,239 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:44:32,240 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:44:32,241 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:44:32,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:44:32,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:44:32,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:44:32,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:44:32,245 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:44:32,245 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:44:32,246 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:44:32,247 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:44:32,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:44:32,249 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:44:32,249 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:44:32,250 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:44:32,250 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:44:32,251 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:44:32,251 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:44:32,251 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:44:32,252 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:44:32,252 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:44:32,253 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:44:32,253 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:44:32,253 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:44:32,253 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:44:32,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:44:32,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:44:32,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:44:32,255 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 17:44:32,268 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:44:32,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:44:32,269 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:44:32,269 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:44:32,269 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:44:32,269 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:44:32,270 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:44:32,270 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:44:32,270 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:44:32,270 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:44:32,270 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:44:32,271 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 17:44:32,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:44:32,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:44:32,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:44:32,276 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 17:44:32,276 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 17:44:32,276 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 17:44:32,277 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:44:32,277 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 17:44:32,277 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:44:32,277 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:44:32,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:44:32,277 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:44:32,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:44:32,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:44:32,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:44:32,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:44:32,278 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 17:44:32,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 17:44:32,278 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:44:32,278 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:44:32,278 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:44:32,278 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:44:32,279 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_6fd783ad-9ac3-4701-910f-27adbe72ac71/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 [2022-12-13 17:44:32,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:44:32,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:44:32,474 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:44:32,475 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:44:32,476 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:44:32,476 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2022-12-13 17:44:35,155 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:44:35,284 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:44:35,284 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2022-12-13 17:44:35,289 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/data/6d39570af/f86a47b028ae43a6b6732011329f4bb7/FLAG59dbcda15 [2022-12-13 17:44:35,299 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/data/6d39570af/f86a47b028ae43a6b6732011329f4bb7 [2022-12-13 17:44:35,301 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:44:35,302 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:44:35,303 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:44:35,303 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:44:35,305 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:44:35,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:44:35" (1/1) ... [2022-12-13 17:44:35,307 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@474ee195 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:35, skipping insertion in model container [2022-12-13 17:44:35,307 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:44:35" (1/1) ... [2022-12-13 17:44:35,312 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:44:35,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:44:35,430 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:44:35,432 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:44:35,435 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:44:35,437 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:44:35,441 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_6fd783ad-9ac3-4701-910f-27adbe72ac71/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2681,2694] [2022-12-13 17:44:35,448 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:44:35,456 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 17:44:35,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1791d08a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:35, skipping insertion in model container [2022-12-13 17:44:35,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:44:35,457 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 17:44:35,458 INFO L158 Benchmark]: Toolchain (without parser) took 155.62ms. Allocated memory is still 121.6MB. Free memory was 85.0MB in the beginning and 75.1MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 17:44:35,458 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 121.6MB. Free memory was 90.5MB in the beginning and 90.4MB in the end (delta: 134.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 17:44:35,459 INFO L158 Benchmark]: CACSL2BoogieTranslator took 154.06ms. Allocated memory is still 121.6MB. Free memory was 84.6MB in the beginning and 75.1MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 17:44:35,460 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 121.6MB. Free memory was 90.5MB in the beginning and 90.4MB in the end (delta: 134.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 154.06ms. Allocated memory is still 121.6MB. Free memory was 84.6MB in the beginning and 75.1MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 97]: 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_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/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_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/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_6fd783ad-9ac3-4701-910f-27adbe72ac71/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 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 --- 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 17:44:36,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:44:36,832 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:44:36,850 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:44:36,851 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:44:36,852 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:44:36,853 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:44:36,855 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:44:36,856 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:44:36,857 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:44:36,858 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:44:36,859 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:44:36,859 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:44:36,860 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:44:36,861 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:44:36,862 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:44:36,863 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:44:36,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:44:36,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:44:36,889 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:44:36,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:44:36,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:44:36,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:44:36,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:44:36,897 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:44:36,897 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:44:36,897 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:44:36,898 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:44:36,899 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:44:36,899 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:44:36,900 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:44:36,900 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:44:36,901 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:44:36,902 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:44:36,903 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:44:36,903 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:44:36,903 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:44:36,904 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:44:36,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:44:36,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:44:36,905 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:44:36,906 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 17:44:36,927 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:44:36,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:44:36,928 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:44:36,928 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:44:36,929 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:44:36,929 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:44:36,930 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:44:36,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:44:36,930 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:44:36,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:44:36,930 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:44:36,930 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 17:44:36,931 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:44:36,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:44:36,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:44:36,931 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 17:44:36,931 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 17:44:36,931 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 17:44:36,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:44:36,932 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 17:44:36,932 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 17:44:36,932 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 17:44:36,932 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:44:36,932 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:44:36,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:44:36,933 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:44:36,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:44:36,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:44:36,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:44:36,934 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:44:36,934 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 17:44:36,934 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 17:44:36,934 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:44:36,934 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:44:36,934 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:44:36,934 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 17:44:36,935 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:44:36,935 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_6fd783ad-9ac3-4701-910f-27adbe72ac71/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 [2022-12-13 17:44:37,174 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:44:37,192 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:44:37,194 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:44:37,194 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:44:37,195 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:44:37,196 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2022-12-13 17:44:39,769 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:44:39,901 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:44:39,901 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2022-12-13 17:44:39,906 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/data/6a7494744/d0c9276c23d64d9b8d3c6060e0004e30/FLAGe30093b72 [2022-12-13 17:44:39,917 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/data/6a7494744/d0c9276c23d64d9b8d3c6060e0004e30 [2022-12-13 17:44:39,919 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:44:39,920 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:44:39,921 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:44:39,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:44:39,924 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:44:39,925 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:44:39" (1/1) ... [2022-12-13 17:44:39,926 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 05:44:39, skipping insertion in model container [2022-12-13 17:44:39,926 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:44:39" (1/1) ... [2022-12-13 17:44:39,931 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:44:39,944 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:44:40,055 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:44:40,058 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:44:40,061 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:44:40,063 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:44:40,067 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_6fd783ad-9ac3-4701-910f-27adbe72ac71/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2681,2694] [2022-12-13 17:44:40,075 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:44:40,084 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 17:44:40,087 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:44:40,090 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:44:40,092 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:44:40,093 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:44:40,095 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:44:40,097 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_6fd783ad-9ac3-4701-910f-27adbe72ac71/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2681,2694] [2022-12-13 17:44:40,099 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:44:40,103 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:44:40,113 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:44:40,115 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:44:40,116 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 17:44:40,117 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 17:44:40,120 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_6fd783ad-9ac3-4701-910f-27adbe72ac71/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2681,2694] [2022-12-13 17:44:40,122 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:44:40,134 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:44:40,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:40 WrapperNode [2022-12-13 17:44:40,135 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:44:40,135 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:44:40,135 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:44:40,136 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:44:40,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:40" (1/1) ... [2022-12-13 17:44:40,149 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:40" (1/1) ... [2022-12-13 17:44:40,166 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 188 [2022-12-13 17:44:40,166 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:44:40,167 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:44:40,167 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:44:40,167 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:44:40,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:40" (1/1) ... [2022-12-13 17:44:40,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:40" (1/1) ... [2022-12-13 17:44:40,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:40" (1/1) ... [2022-12-13 17:44:40,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:40" (1/1) ... [2022-12-13 17:44:40,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:40" (1/1) ... [2022-12-13 17:44:40,188 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:40" (1/1) ... [2022-12-13 17:44:40,189 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:40" (1/1) ... [2022-12-13 17:44:40,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:40" (1/1) ... [2022-12-13 17:44:40,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:44:40,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:44:40,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:44:40,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:44:40,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:40" (1/1) ... [2022-12-13 17:44:40,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:44:40,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:44:40,218 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:44:40,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:44:40,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 17:44:40,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 17:44:40,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 17:44:40,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 17:44:40,261 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 17:44:40,262 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 17:44:40,262 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 17:44:40,262 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 17:44:40,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 17:44:40,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 17:44:40,263 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 17:44:40,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:44:40,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:44:40,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 17:44:40,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 17:44:40,265 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 17:44:40,351 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:44:40,353 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:44:40,858 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:44:41,077 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:44:41,078 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 17:44:41,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:44:41 BoogieIcfgContainer [2022-12-13 17:44:41,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:44:41,081 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:44:41,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:44:41,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:44:41,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:44:39" (1/3) ... [2022-12-13 17:44:41,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14772c85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:44:41, skipping insertion in model container [2022-12-13 17:44:41,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:44:40" (2/3) ... [2022-12-13 17:44:41,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14772c85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:44:41, skipping insertion in model container [2022-12-13 17:44:41,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:44:41" (3/3) ... [2022-12-13 17:44:41,085 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2022-12-13 17:44:41,099 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:44:41,099 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2022-12-13 17:44:41,099 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 17:44:41,186 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 17:44:41,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 196 transitions, 408 flow [2022-12-13 17:44:41,299 INFO L130 PetriNetUnfolder]: 13/194 cut-off events. [2022-12-13 17:44:41,299 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 17:44:41,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 194 events. 13/194 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 264 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 142. Up to 2 conditions per place. [2022-12-13 17:44:41,303 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 196 transitions, 408 flow [2022-12-13 17:44:41,307 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 189 transitions, 390 flow [2022-12-13 17:44:41,310 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:44:41,317 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 183 places, 189 transitions, 390 flow [2022-12-13 17:44:41,319 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 183 places, 189 transitions, 390 flow [2022-12-13 17:44:41,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 189 transitions, 390 flow [2022-12-13 17:44:41,346 INFO L130 PetriNetUnfolder]: 13/189 cut-off events. [2022-12-13 17:44:41,347 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 17:44:41,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 189 events. 13/189 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 267 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 142. Up to 2 conditions per place. [2022-12-13 17:44:41,348 INFO L119 LiptonReduction]: Number of co-enabled transitions 1720 [2022-12-13 17:45:05,283 INFO L134 LiptonReduction]: Checked pairs total: 2314 [2022-12-13 17:45:05,283 INFO L136 LiptonReduction]: Total number of compositions: 202 [2022-12-13 17:45:05,293 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:45:05,297 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;@661faf22, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:45:05,297 INFO L358 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2022-12-13 17:45:05,299 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 17:45:05,299 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:45:05,299 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:05,300 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 17:45:05,300 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:45:05,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:05,304 INFO L85 PathProgramCache]: Analyzing trace with hash 30238, now seen corresponding path program 1 times [2022-12-13 17:45:05,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:45:05,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733759411] [2022-12-13 17:45:05,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:05,313 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 17:45:05,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:45:05,314 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:05,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:05,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 17:45:05,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:05,512 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 17:45:05,513 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 17:45:05,532 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 17:45:05,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:45:05,533 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:45:05,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733759411] [2022-12-13 17:45:05,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733759411] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:05,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:05,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:45:05,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951387153] [2022-12-13 17:45:05,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:05,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:45:05,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:45:05,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:45:05,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:45:05,674 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 398 [2022-12-13 17:45:05,676 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:05,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:05,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 398 [2022-12-13 17:45:05,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:05,944 INFO L130 PetriNetUnfolder]: 646/907 cut-off events. [2022-12-13 17:45:05,944 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-12-13 17:45:05,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1834 conditions, 907 events. 646/907 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 3922 event pairs, 306 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 1644. Up to 899 conditions per place. [2022-12-13 17:45:05,952 INFO L137 encePairwiseOnDemand]: 382/398 looper letters, 34 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2022-12-13 17:45:05,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 156 flow [2022-12-13 17:45:05,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:45:05,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:45:05,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 500 transitions. [2022-12-13 17:45:05,962 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4187604690117253 [2022-12-13 17:45:05,963 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 500 transitions. [2022-12-13 17:45:05,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 500 transitions. [2022-12-13 17:45:05,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:05,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 500 transitions. [2022-12-13 17:45:05,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:05,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:05,974 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:05,975 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 116 flow. Second operand 3 states and 500 transitions. [2022-12-13 17:45:05,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 156 flow [2022-12-13 17:45:05,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 37 transitions, 148 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 17:45:05,980 INFO L231 Difference]: Finished difference. Result has 38 places, 37 transitions, 80 flow [2022-12-13 17:45:05,982 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=38, PETRI_TRANSITIONS=37} [2022-12-13 17:45:05,985 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, -17 predicate places. [2022-12-13 17:45:05,985 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 37 transitions, 80 flow [2022-12-13 17:45:05,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:05,986 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:05,986 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 17:45:05,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:06,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:06,187 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:45:06,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:06,188 INFO L85 PathProgramCache]: Analyzing trace with hash 30239, now seen corresponding path program 1 times [2022-12-13 17:45:06,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:45:06,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1928830647] [2022-12-13 17:45:06,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:06,188 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 17:45:06,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:45:06,189 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:06,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:06,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:06,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 17:45:06,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:06,312 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 17:45:06,313 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 17:45:06,334 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 17:45:06,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:45:06,334 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:45:06,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1928830647] [2022-12-13 17:45:06,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1928830647] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:06,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:06,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:45:06,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481541868] [2022-12-13 17:45:06,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:06,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:45:06,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:45:06,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:45:06,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:45:06,498 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 398 [2022-12-13 17:45:06,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 37 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:06,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:06,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 398 [2022-12-13 17:45:06,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:06,969 INFO L130 PetriNetUnfolder]: 1291/1811 cut-off events. [2022-12-13 17:45:06,969 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 17:45:06,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3626 conditions, 1811 events. 1291/1811 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 8914 event pairs, 612 based on Foata normal form. 0/401 useless extension candidates. Maximal degree in co-relation 3620. Up to 900 conditions per place. [2022-12-13 17:45:06,977 INFO L137 encePairwiseOnDemand]: 392/398 looper letters, 63 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2022-12-13 17:45:06,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 69 transitions, 282 flow [2022-12-13 17:45:06,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:45:06,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:45:06,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 519 transitions. [2022-12-13 17:45:06,980 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43467336683417085 [2022-12-13 17:45:06,981 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 519 transitions. [2022-12-13 17:45:06,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 519 transitions. [2022-12-13 17:45:06,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:06,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 519 transitions. [2022-12-13 17:45:06,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:06,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:06,986 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:06,986 INFO L175 Difference]: Start difference. First operand has 38 places, 37 transitions, 80 flow. Second operand 3 states and 519 transitions. [2022-12-13 17:45:06,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 69 transitions, 282 flow [2022-12-13 17:45:06,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 69 transitions, 281 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:45:06,987 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 111 flow [2022-12-13 17:45:06,988 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2022-12-13 17:45:06,988 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, -14 predicate places. [2022-12-13 17:45:06,988 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 111 flow [2022-12-13 17:45:06,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:06,989 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:06,989 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 17:45:06,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:07,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:07,190 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:45:07,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:07,190 INFO L85 PathProgramCache]: Analyzing trace with hash 942403, now seen corresponding path program 1 times [2022-12-13 17:45:07,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:45:07,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92414948] [2022-12-13 17:45:07,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:07,191 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 17:45:07,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:45:07,192 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:07,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:07,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:07,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 17:45:07,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:07,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:45:07,291 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-13 17:45:07,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2022-12-13 17:45:07,335 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 17:45:07,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 17:45:07,344 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 17:45:07,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:45:07,344 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:45:07,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92414948] [2022-12-13 17:45:07,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [92414948] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:07,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:07,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:45:07,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492714271] [2022-12-13 17:45:07,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:07,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:45:07,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:45:07,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:45:07,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:45:07,474 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 398 [2022-12-13 17:45:07,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:07,475 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:07,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 398 [2022-12-13 17:45:07,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:07,775 INFO L130 PetriNetUnfolder]: 969/1389 cut-off events. [2022-12-13 17:45:07,775 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 17:45:07,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2796 conditions, 1389 events. 969/1389 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 6775 event pairs, 458 based on Foata normal form. 0/349 useless extension candidates. Maximal degree in co-relation 2787. Up to 1373 conditions per place. [2022-12-13 17:45:07,780 INFO L137 encePairwiseOnDemand]: 395/398 looper letters, 35 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2022-12-13 17:45:07,780 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 179 flow [2022-12-13 17:45:07,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:45:07,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:45:07,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 494 transitions. [2022-12-13 17:45:07,782 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4137353433835846 [2022-12-13 17:45:07,782 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 494 transitions. [2022-12-13 17:45:07,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 494 transitions. [2022-12-13 17:45:07,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:07,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 494 transitions. [2022-12-13 17:45:07,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:07,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:07,786 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:07,786 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 111 flow. Second operand 3 states and 494 transitions. [2022-12-13 17:45:07,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 179 flow [2022-12-13 17:45:07,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 171 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:45:07,787 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 101 flow [2022-12-13 17:45:07,787 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2022-12-13 17:45:07,787 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, -16 predicate places. [2022-12-13 17:45:07,787 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 101 flow [2022-12-13 17:45:07,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:07,788 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:07,788 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 17:45:07,799 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:07,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:07,989 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:45:07,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:07,990 INFO L85 PathProgramCache]: Analyzing trace with hash 942404, now seen corresponding path program 1 times [2022-12-13 17:45:07,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:45:07,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123900509] [2022-12-13 17:45:07,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:07,990 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 17:45:07,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:45:07,991 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:07,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:08,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:08,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 17:45:08,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:08,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:45:08,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:45:08,139 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 17:45:08,140 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 1 case distinctions, treesize of input 12 treesize of output 20 [2022-12-13 17:45:08,149 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 10 treesize of output 8 [2022-12-13 17:45:08,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:45:08,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 17:45:08,211 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 17:45:08,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:45:08,211 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:45:08,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123900509] [2022-12-13 17:45:08,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123900509] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:08,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:08,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:45:08,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416331313] [2022-12-13 17:45:08,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:08,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:45:08,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:45:08,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:45:08,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:45:08,388 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 398 [2022-12-13 17:45:08,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:08,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:08,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 398 [2022-12-13 17:45:08,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:08,660 INFO L130 PetriNetUnfolder]: 647/967 cut-off events. [2022-12-13 17:45:08,660 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 17:45:08,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1949 conditions, 967 events. 647/967 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 4687 event pairs, 304 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 1940. Up to 951 conditions per place. [2022-12-13 17:45:08,664 INFO L137 encePairwiseOnDemand]: 395/398 looper letters, 33 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2022-12-13 17:45:08,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 36 transitions, 165 flow [2022-12-13 17:45:08,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:45:08,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:45:08,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 492 transitions. [2022-12-13 17:45:08,666 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4120603015075377 [2022-12-13 17:45:08,666 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 492 transitions. [2022-12-13 17:45:08,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 492 transitions. [2022-12-13 17:45:08,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:08,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 492 transitions. [2022-12-13 17:45:08,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:08,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:08,669 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:08,669 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 101 flow. Second operand 3 states and 492 transitions. [2022-12-13 17:45:08,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 36 transitions, 165 flow [2022-12-13 17:45:08,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 36 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:45:08,670 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 98 flow [2022-12-13 17:45:08,670 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2022-12-13 17:45:08,671 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, -17 predicate places. [2022-12-13 17:45:08,671 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 98 flow [2022-12-13 17:45:08,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:08,672 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:08,672 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 17:45:08,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:08,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:08,873 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:45:08,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:08,873 INFO L85 PathProgramCache]: Analyzing trace with hash 941205, now seen corresponding path program 1 times [2022-12-13 17:45:08,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:45:08,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1766220343] [2022-12-13 17:45:08,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:08,874 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 17:45:08,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:45:08,875 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:08,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:08,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:08,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 17:45:08,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:08,974 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 17:45:08,975 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 17:45:09,018 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 17:45:09,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:09,192 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 17:45:09,192 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:45:09,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1766220343] [2022-12-13 17:45:09,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1766220343] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:09,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:45:09,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 17:45:09,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24772247] [2022-12-13 17:45:09,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:09,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 17:45:09,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:45:09,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 17:45:09,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 17:45:09,787 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 398 [2022-12-13 17:45:09,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 98 flow. Second operand has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:09,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:09,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 398 [2022-12-13 17:45:09,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:11,113 INFO L130 PetriNetUnfolder]: 974/1457 cut-off events. [2022-12-13 17:45:11,114 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 17:45:11,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2939 conditions, 1457 events. 974/1457 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 7497 event pairs, 456 based on Foata normal form. 0/442 useless extension candidates. Maximal degree in co-relation 2929. Up to 477 conditions per place. [2022-12-13 17:45:11,118 INFO L137 encePairwiseOnDemand]: 391/398 looper letters, 80 selfloop transitions, 15 changer transitions 0/97 dead transitions. [2022-12-13 17:45:11,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 97 transitions, 436 flow [2022-12-13 17:45:11,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:45:11,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:45:11,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 941 transitions. [2022-12-13 17:45:11,120 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3940536013400335 [2022-12-13 17:45:11,120 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 941 transitions. [2022-12-13 17:45:11,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 941 transitions. [2022-12-13 17:45:11,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:11,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 941 transitions. [2022-12-13 17:45:11,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 156.83333333333334) internal successors, (941), 6 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:11,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 398.0) internal successors, (2786), 7 states have internal predecessors, (2786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:11,124 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 398.0) internal successors, (2786), 7 states have internal predecessors, (2786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:11,125 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 98 flow. Second operand 6 states and 941 transitions. [2022-12-13 17:45:11,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 97 transitions, 436 flow [2022-12-13 17:45:11,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 97 transitions, 435 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:45:11,126 INFO L231 Difference]: Finished difference. Result has 46 places, 47 transitions, 210 flow [2022-12-13 17:45:11,126 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=46, PETRI_TRANSITIONS=47} [2022-12-13 17:45:11,126 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, -9 predicate places. [2022-12-13 17:45:11,127 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 47 transitions, 210 flow [2022-12-13 17:45:11,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:11,127 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:11,127 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 17:45:11,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-12-13 17:45:11,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:11,328 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:45:11,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:11,328 INFO L85 PathProgramCache]: Analyzing trace with hash 905674315, now seen corresponding path program 1 times [2022-12-13 17:45:11,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:45:11,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1448886200] [2022-12-13 17:45:11,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:11,329 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 17:45:11,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:45:11,329 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:11,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:11,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:11,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 17:45:11,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:11,415 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-12-13 17:45:11,416 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 2 case distinctions, treesize of input 26 treesize of output 33 [2022-12-13 17:45:11,439 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 17:45:11,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 17:45:11,450 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 17:45:11,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:45:11,450 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:45:11,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1448886200] [2022-12-13 17:45:11,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1448886200] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:11,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:11,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:45:11,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300321150] [2022-12-13 17:45:11,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:11,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:45:11,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:45:11,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:45:11,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:45:11,520 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 398 [2022-12-13 17:45:11,520 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:11,520 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:11,520 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 398 [2022-12-13 17:45:11,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:11,811 INFO L130 PetriNetUnfolder]: 905/1346 cut-off events. [2022-12-13 17:45:11,812 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-12-13 17:45:11,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2762 conditions, 1346 events. 905/1346 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 6801 event pairs, 423 based on Foata normal form. 0/436 useless extension candidates. Maximal degree in co-relation 2747. Up to 1322 conditions per place. [2022-12-13 17:45:11,818 INFO L137 encePairwiseOnDemand]: 395/398 looper letters, 42 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2022-12-13 17:45:11,818 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 292 flow [2022-12-13 17:45:11,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:45:11,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:45:11,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 484 transitions. [2022-12-13 17:45:11,820 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4053601340033501 [2022-12-13 17:45:11,820 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 484 transitions. [2022-12-13 17:45:11,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 484 transitions. [2022-12-13 17:45:11,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:11,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 484 transitions. [2022-12-13 17:45:11,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:11,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:11,822 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:11,822 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 210 flow. Second operand 3 states and 484 transitions. [2022-12-13 17:45:11,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 292 flow [2022-12-13 17:45:11,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 273 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 17:45:11,824 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 189 flow [2022-12-13 17:45:11,824 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2022-12-13 17:45:11,824 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, -10 predicate places. [2022-12-13 17:45:11,825 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 189 flow [2022-12-13 17:45:11,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:11,825 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:11,825 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 17:45:11,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-13 17:45:12,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:12,027 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:45:12,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:12,028 INFO L85 PathProgramCache]: Analyzing trace with hash 905674316, now seen corresponding path program 1 times [2022-12-13 17:45:12,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:45:12,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [910823196] [2022-12-13 17:45:12,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:12,030 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 17:45:12,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:45:12,034 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:12,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:12,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 17:45:12,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:12,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:45:12,239 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-12-13 17:45:12,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-12-13 17:45:12,248 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 42 treesize of output 38 [2022-12-13 17:45:12,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:45:12,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 17:45:12,326 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 17:45:12,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:45:12,327 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:45:12,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [910823196] [2022-12-13 17:45:12,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [910823196] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:12,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:12,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:45:12,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289836741] [2022-12-13 17:45:12,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:12,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:45:12,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:45:12,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:45:12,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:45:12,508 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 398 [2022-12-13 17:45:12,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 189 flow. Second operand has 4 states, 4 states have (on average 152.25) internal successors, (609), 4 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:12,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:12,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 398 [2022-12-13 17:45:12,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:12,800 INFO L130 PetriNetUnfolder]: 836/1235 cut-off events. [2022-12-13 17:45:12,800 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-12-13 17:45:12,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2531 conditions, 1235 events. 836/1235 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 6119 event pairs, 390 based on Foata normal form. 0/424 useless extension candidates. Maximal degree in co-relation 2515. Up to 1211 conditions per place. [2022-12-13 17:45:12,805 INFO L137 encePairwiseOnDemand]: 395/398 looper letters, 40 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2022-12-13 17:45:12,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 267 flow [2022-12-13 17:45:12,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:45:12,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:45:12,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 482 transitions. [2022-12-13 17:45:12,807 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4036850921273032 [2022-12-13 17:45:12,807 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 482 transitions. [2022-12-13 17:45:12,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 482 transitions. [2022-12-13 17:45:12,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:12,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 482 transitions. [2022-12-13 17:45:12,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:12,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:12,809 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:12,809 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 189 flow. Second operand 3 states and 482 transitions. [2022-12-13 17:45:12,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 267 flow [2022-12-13 17:45:12,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 266 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:45:12,810 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 186 flow [2022-12-13 17:45:12,810 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=42, 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=186, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2022-12-13 17:45:12,811 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, -11 predicate places. [2022-12-13 17:45:12,811 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 186 flow [2022-12-13 17:45:12,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 152.25) internal successors, (609), 4 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:12,811 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:12,811 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 17:45:12,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:13,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:13,013 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:45:13,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:13,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1988872977, now seen corresponding path program 1 times [2022-12-13 17:45:13,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:45:13,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [16751161] [2022-12-13 17:45:13,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:13,016 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 17:45:13,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:45:13,019 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:13,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:13,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:13,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 17:45:13,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:13,169 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 17:45:13,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:45:13,170 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:45:13,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [16751161] [2022-12-13 17:45:13,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [16751161] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:13,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:13,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:45:13,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623982958] [2022-12-13 17:45:13,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:13,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:45:13,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:45:13,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:45:13,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:45:13,241 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 398 [2022-12-13 17:45:13,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 186 flow. Second operand has 4 states, 4 states have (on average 151.25) internal successors, (605), 4 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:13,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:13,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 398 [2022-12-13 17:45:13,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:13,608 INFO L130 PetriNetUnfolder]: 901/1405 cut-off events. [2022-12-13 17:45:13,608 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-12-13 17:45:13,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2896 conditions, 1405 events. 901/1405 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 7617 event pairs, 453 based on Foata normal form. 3/561 useless extension candidates. Maximal degree in co-relation 2879. Up to 1210 conditions per place. [2022-12-13 17:45:13,612 INFO L137 encePairwiseOnDemand]: 386/398 looper letters, 56 selfloop transitions, 3 changer transitions 2/63 dead transitions. [2022-12-13 17:45:13,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 63 transitions, 392 flow [2022-12-13 17:45:13,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:45:13,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:45:13,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 652 transitions. [2022-12-13 17:45:13,614 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40954773869346733 [2022-12-13 17:45:13,614 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 652 transitions. [2022-12-13 17:45:13,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 652 transitions. [2022-12-13 17:45:13,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:13,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 652 transitions. [2022-12-13 17:45:13,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:13,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 398.0) internal successors, (1990), 5 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:13,617 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 398.0) internal successors, (1990), 5 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:13,617 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 186 flow. Second operand 4 states and 652 transitions. [2022-12-13 17:45:13,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 63 transitions, 392 flow [2022-12-13 17:45:13,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 63 transitions, 391 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:45:13,619 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 210 flow [2022-12-13 17:45:13,619 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=43, 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=4, PETRI_FLOW=210, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2022-12-13 17:45:13,619 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, -8 predicate places. [2022-12-13 17:45:13,619 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 210 flow [2022-12-13 17:45:13,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 151.25) internal successors, (605), 4 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:13,620 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:13,620 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 17:45:13,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:13,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:13,821 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:45:13,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:13,823 INFO L85 PathProgramCache]: Analyzing trace with hash -2021563489, now seen corresponding path program 2 times [2022-12-13 17:45:13,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:45:13,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1088556292] [2022-12-13 17:45:13,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:45:13,825 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 17:45:13,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:45:13,828 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:13,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:14,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:45:14,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:45:14,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 17:45:14,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:14,057 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 17:45:14,057 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 17:45:14,158 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 17:45:14,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:14,710 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 17:45:14,710 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:45:14,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1088556292] [2022-12-13 17:45:14,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1088556292] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:14,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:45:14,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 17:45:14,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963774989] [2022-12-13 17:45:14,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:14,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 17:45:14,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:45:14,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 17:45:14,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 17:45:17,867 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 398 [2022-12-13 17:45:17,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 210 flow. Second operand has 12 states, 12 states have (on average 143.0) internal successors, (1716), 12 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:17,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:17,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 398 [2022-12-13 17:45:17,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:21,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 17:45:23,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 17:45:25,721 WARN L539 Checker$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 17:45:27,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 17:45:31,332 INFO L130 PetriNetUnfolder]: 2795/4289 cut-off events. [2022-12-13 17:45:31,332 INFO L131 PetriNetUnfolder]: For 387/387 co-relation queries the response was YES. [2022-12-13 17:45:31,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10810 conditions, 4289 events. 2795/4289 cut-off events. For 387/387 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 26208 event pairs, 1368 based on Foata normal form. 14/2172 useless extension candidates. Maximal degree in co-relation 10791. Up to 2062 conditions per place. [2022-12-13 17:45:31,346 INFO L137 encePairwiseOnDemand]: 391/398 looper letters, 194 selfloop transitions, 32 changer transitions 0/228 dead transitions. [2022-12-13 17:45:31,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 228 transitions, 1312 flow [2022-12-13 17:45:31,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 17:45:31,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 17:45:31,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2224 transitions. [2022-12-13 17:45:31,351 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39913854989231873 [2022-12-13 17:45:31,351 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2224 transitions. [2022-12-13 17:45:31,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2224 transitions. [2022-12-13 17:45:31,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:31,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2224 transitions. [2022-12-13 17:45:31,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 158.85714285714286) internal successors, (2224), 14 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:31,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 398.0) internal successors, (5970), 15 states have internal predecessors, (5970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:31,359 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 398.0) internal successors, (5970), 15 states have internal predecessors, (5970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:31,359 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 210 flow. Second operand 14 states and 2224 transitions. [2022-12-13 17:45:31,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 228 transitions, 1312 flow [2022-12-13 17:45:31,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 228 transitions, 1306 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 17:45:31,362 INFO L231 Difference]: Finished difference. Result has 68 places, 62 transitions, 446 flow [2022-12-13 17:45:31,362 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=446, PETRI_PLACES=68, PETRI_TRANSITIONS=62} [2022-12-13 17:45:31,363 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2022-12-13 17:45:31,363 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 62 transitions, 446 flow [2022-12-13 17:45:31,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 143.0) internal successors, (1716), 12 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:31,363 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:31,363 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:31,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-13 17:45:31,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:31,565 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:45:31,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:31,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1788735592, now seen corresponding path program 1 times [2022-12-13 17:45:31,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:45:31,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639562250] [2022-12-13 17:45:31,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:31,568 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 17:45:31,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:45:31,570 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:31,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:31,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:31,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:45:31,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:31,685 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 17:45:31,685 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 17:45:31,702 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 17:45:31,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 17:45:31,715 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 17:45:31,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:45:31,715 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:45:31,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639562250] [2022-12-13 17:45:31,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639562250] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:31,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:31,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:45:31,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965113558] [2022-12-13 17:45:31,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:31,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:45:31,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:45:31,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:45:31,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:45:31,792 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 398 [2022-12-13 17:45:31,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 62 transitions, 446 flow. Second operand has 4 states, 4 states have (on average 149.5) internal successors, (598), 4 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:31,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:31,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 398 [2022-12-13 17:45:31,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:32,340 INFO L130 PetriNetUnfolder]: 2093/3317 cut-off events. [2022-12-13 17:45:32,340 INFO L131 PetriNetUnfolder]: For 360/360 co-relation queries the response was YES. [2022-12-13 17:45:32,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8281 conditions, 3317 events. 2093/3317 cut-off events. For 360/360 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 20091 event pairs, 1035 based on Foata normal form. 0/1885 useless extension candidates. Maximal degree in co-relation 8252. Up to 3223 conditions per place. [2022-12-13 17:45:32,352 INFO L137 encePairwiseOnDemand]: 394/398 looper letters, 46 selfloop transitions, 12 changer transitions 0/60 dead transitions. [2022-12-13 17:45:32,352 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 60 transitions, 554 flow [2022-12-13 17:45:32,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:45:32,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:45:32,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 619 transitions. [2022-12-13 17:45:32,354 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3888190954773869 [2022-12-13 17:45:32,354 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 619 transitions. [2022-12-13 17:45:32,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 619 transitions. [2022-12-13 17:45:32,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:32,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 619 transitions. [2022-12-13 17:45:32,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:32,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 398.0) internal successors, (1990), 5 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:32,356 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 398.0) internal successors, (1990), 5 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:32,356 INFO L175 Difference]: Start difference. First operand has 68 places, 62 transitions, 446 flow. Second operand 4 states and 619 transitions. [2022-12-13 17:45:32,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 60 transitions, 554 flow [2022-12-13 17:45:32,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 60 transitions, 488 flow, removed 17 selfloop flow, removed 4 redundant places. [2022-12-13 17:45:32,359 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 396 flow [2022-12-13 17:45:32,359 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=396, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2022-12-13 17:45:32,360 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 10 predicate places. [2022-12-13 17:45:32,360 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 396 flow [2022-12-13 17:45:32,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 149.5) internal successors, (598), 4 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:32,360 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:32,360 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:32,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:32,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:32,561 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:45:32,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:32,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1788735589, now seen corresponding path program 1 times [2022-12-13 17:45:32,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:45:32,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670800467] [2022-12-13 17:45:32,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:32,563 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 17:45:32,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:45:32,564 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:32,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:32,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:32,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 17:45:32,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:32,708 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 17:45:32,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:45:32,708 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:45:32,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670800467] [2022-12-13 17:45:32,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670800467] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:32,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:32,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:45:32,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709590517] [2022-12-13 17:45:32,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:32,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:45:32,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:45:32,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:45:32,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:45:32,803 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 398 [2022-12-13 17:45:32,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 396 flow. Second operand has 4 states, 4 states have (on average 151.5) internal successors, (606), 4 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:32,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:32,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 398 [2022-12-13 17:45:32,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:33,380 INFO L130 PetriNetUnfolder]: 1886/3028 cut-off events. [2022-12-13 17:45:33,380 INFO L131 PetriNetUnfolder]: For 454/454 co-relation queries the response was YES. [2022-12-13 17:45:33,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7514 conditions, 3028 events. 1886/3028 cut-off events. For 454/454 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 18554 event pairs, 944 based on Foata normal form. 8/1764 useless extension candidates. Maximal degree in co-relation 7484. Up to 2872 conditions per place. [2022-12-13 17:45:33,391 INFO L137 encePairwiseOnDemand]: 388/398 looper letters, 57 selfloop transitions, 13 changer transitions 0/72 dead transitions. [2022-12-13 17:45:33,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 72 transitions, 572 flow [2022-12-13 17:45:33,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:45:33,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:45:33,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 645 transitions. [2022-12-13 17:45:33,393 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40515075376884424 [2022-12-13 17:45:33,393 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 645 transitions. [2022-12-13 17:45:33,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 645 transitions. [2022-12-13 17:45:33,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:33,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 645 transitions. [2022-12-13 17:45:33,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 161.25) internal successors, (645), 4 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:33,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 398.0) internal successors, (1990), 5 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:33,397 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 398.0) internal successors, (1990), 5 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:33,397 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 396 flow. Second operand 4 states and 645 transitions. [2022-12-13 17:45:33,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 72 transitions, 572 flow [2022-12-13 17:45:33,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 72 transitions, 559 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:45:33,400 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 445 flow [2022-12-13 17:45:33,400 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=445, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2022-12-13 17:45:33,401 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2022-12-13 17:45:33,401 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 445 flow [2022-12-13 17:45:33,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 151.5) internal successors, (606), 4 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:33,401 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:33,401 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:33,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-13 17:45:33,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:33,602 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:45:33,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:33,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1788735593, now seen corresponding path program 1 times [2022-12-13 17:45:33,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:45:33,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902148466] [2022-12-13 17:45:33,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:33,605 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:45:33,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:45:33,608 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:33,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:33,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:33,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 17:45:33,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:33,793 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 17:45:33,794 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 17:45:33,849 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 17:45:33,849 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 17:45:33,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:45:33,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 17:45:33,948 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 17:45:33,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 17:45:34,015 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 17:45:34,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:36,434 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 17:45:36,434 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:45:36,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902148466] [2022-12-13 17:45:36,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [902148466] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:36,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:45:36,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 17:45:36,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666141697] [2022-12-13 17:45:36,435 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:36,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 17:45:36,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:45:36,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 17:45:36,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 17:45:38,802 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 398 [2022-12-13 17:45:38,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 445 flow. Second operand has 8 states, 8 states have (on average 134.5) internal successors, (1076), 8 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:38,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:38,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 398 [2022-12-13 17:45:38,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:48,045 INFO L130 PetriNetUnfolder]: 4598/7761 cut-off events. [2022-12-13 17:45:48,045 INFO L131 PetriNetUnfolder]: For 3258/3258 co-relation queries the response was YES. [2022-12-13 17:45:48,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23080 conditions, 7761 events. 4598/7761 cut-off events. For 3258/3258 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 58572 event pairs, 1716 based on Foata normal form. 408/5859 useless extension candidates. Maximal degree in co-relation 23049. Up to 4031 conditions per place. [2022-12-13 17:45:48,076 INFO L137 encePairwiseOnDemand]: 385/398 looper letters, 172 selfloop transitions, 55 changer transitions 27/256 dead transitions. [2022-12-13 17:45:48,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 256 transitions, 1837 flow [2022-12-13 17:45:48,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 17:45:48,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 17:45:48,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2479 transitions. [2022-12-13 17:45:48,080 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36639077741649423 [2022-12-13 17:45:48,080 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2479 transitions. [2022-12-13 17:45:48,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2479 transitions. [2022-12-13 17:45:48,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:48,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2479 transitions. [2022-12-13 17:45:48,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 145.8235294117647) internal successors, (2479), 17 states have internal predecessors, (2479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:48,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 398.0) internal successors, (7164), 18 states have internal predecessors, (7164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:48,089 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 398.0) internal successors, (7164), 18 states have internal predecessors, (7164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:48,089 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 445 flow. Second operand 17 states and 2479 transitions. [2022-12-13 17:45:48,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 256 transitions, 1837 flow [2022-12-13 17:45:48,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 256 transitions, 1782 flow, removed 12 selfloop flow, removed 2 redundant places. [2022-12-13 17:45:48,097 INFO L231 Difference]: Finished difference. Result has 96 places, 101 transitions, 967 flow [2022-12-13 17:45:48,097 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=967, PETRI_PLACES=96, PETRI_TRANSITIONS=101} [2022-12-13 17:45:48,098 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 41 predicate places. [2022-12-13 17:45:48,098 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 101 transitions, 967 flow [2022-12-13 17:45:48,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 134.5) internal successors, (1076), 8 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:48,098 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:48,098 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:48,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:48,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:48,299 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:45:48,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:48,300 INFO L85 PathProgramCache]: Analyzing trace with hash -381856810, now seen corresponding path program 1 times [2022-12-13 17:45:48,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:45:48,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383204853] [2022-12-13 17:45:48,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:48,301 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 17:45:48,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:45:48,303 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:48,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:48,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:48,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 17:45:48,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:48,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 17:45:48,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:45:48,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:45:48,467 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:45:48,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383204853] [2022-12-13 17:45:48,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383204853] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:45:48,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:45:48,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:45:48,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533346312] [2022-12-13 17:45:48,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:45:48,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:45:48,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:45:48,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:45:48,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:45:48,589 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 398 [2022-12-13 17:45:48,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 101 transitions, 967 flow. Second operand has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:48,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:48,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 398 [2022-12-13 17:45:48,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:49,471 INFO L130 PetriNetUnfolder]: 3008/5342 cut-off events. [2022-12-13 17:45:49,471 INFO L131 PetriNetUnfolder]: For 18636/18636 co-relation queries the response was YES. [2022-12-13 17:45:49,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19725 conditions, 5342 events. 3008/5342 cut-off events. For 18636/18636 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 40234 event pairs, 1776 based on Foata normal form. 0/5342 useless extension candidates. Maximal degree in co-relation 19680. Up to 5127 conditions per place. [2022-12-13 17:45:49,501 INFO L137 encePairwiseOnDemand]: 394/398 looper letters, 76 selfloop transitions, 19 changer transitions 0/97 dead transitions. [2022-12-13 17:45:49,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 97 transitions, 1123 flow [2022-12-13 17:45:49,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:45:49,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:45:49,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 617 transitions. [2022-12-13 17:45:49,503 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38756281407035176 [2022-12-13 17:45:49,503 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 617 transitions. [2022-12-13 17:45:49,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 617 transitions. [2022-12-13 17:45:49,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:45:49,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 617 transitions. [2022-12-13 17:45:49,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.25) internal successors, (617), 4 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:49,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 398.0) internal successors, (1990), 5 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:49,508 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 398.0) internal successors, (1990), 5 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:49,508 INFO L175 Difference]: Start difference. First operand has 96 places, 101 transitions, 967 flow. Second operand 4 states and 617 transitions. [2022-12-13 17:45:49,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 97 transitions, 1123 flow [2022-12-13 17:45:49,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 97 transitions, 1113 flow, removed 5 selfloop flow, removed 0 redundant places. [2022-12-13 17:45:49,547 INFO L231 Difference]: Finished difference. Result has 97 places, 97 transitions, 961 flow [2022-12-13 17:45:49,547 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=923, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=961, PETRI_PLACES=97, PETRI_TRANSITIONS=97} [2022-12-13 17:45:49,548 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 42 predicate places. [2022-12-13 17:45:49,548 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 97 transitions, 961 flow [2022-12-13 17:45:49,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:49,549 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:45:49,549 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:45:49,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-12-13 17:45:49,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:49,749 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:45:49,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:45:49,750 INFO L85 PathProgramCache]: Analyzing trace with hash -381856809, now seen corresponding path program 1 times [2022-12-13 17:45:49,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:45:49,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1944586688] [2022-12-13 17:45:49,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:45:49,750 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 17:45:49,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:45:49,751 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:49,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:45:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:45:49,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 17:45:49,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:45:49,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 17:45:49,976 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 17:45:49,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:45:49,988 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:45:49,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 62 [2022-12-13 17:45:50,653 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 17:45:50,653 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:45:50,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1944586688] [2022-12-13 17:45:50,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1944586688] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:45:50,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:45:50,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-12-13 17:45:50,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823377470] [2022-12-13 17:45:50,654 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:45:50,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 17:45:50,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:45:50,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 17:45:50,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-13 17:45:55,354 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 398 [2022-12-13 17:45:55,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 97 transitions, 961 flow. Second operand has 8 states, 8 states have (on average 137.5) internal successors, (1100), 8 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:45:55,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:45:55,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 398 [2022-12-13 17:45:55,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:45:59,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:46:01,427 INFO L130 PetriNetUnfolder]: 2693/4867 cut-off events. [2022-12-13 17:46:01,427 INFO L131 PetriNetUnfolder]: For 16814/16814 co-relation queries the response was YES. [2022-12-13 17:46:01,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17592 conditions, 4867 events. 2693/4867 cut-off events. For 16814/16814 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 36448 event pairs, 1467 based on Foata normal form. 208/5075 useless extension candidates. Maximal degree in co-relation 17545. Up to 3064 conditions per place. [2022-12-13 17:46:01,450 INFO L137 encePairwiseOnDemand]: 391/398 looper letters, 117 selfloop transitions, 49 changer transitions 0/168 dead transitions. [2022-12-13 17:46:01,450 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 168 transitions, 1780 flow [2022-12-13 17:46:01,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 17:46:01,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 17:46:01,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1441 transitions. [2022-12-13 17:46:01,453 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3620603015075377 [2022-12-13 17:46:01,454 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1441 transitions. [2022-12-13 17:46:01,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1441 transitions. [2022-12-13 17:46:01,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:46:01,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1441 transitions. [2022-12-13 17:46:01,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 144.1) internal successors, (1441), 10 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:01,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 398.0) internal successors, (4378), 11 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:01,459 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 398.0) internal successors, (4378), 11 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:01,459 INFO L175 Difference]: Start difference. First operand has 97 places, 97 transitions, 961 flow. Second operand 10 states and 1441 transitions. [2022-12-13 17:46:01,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 168 transitions, 1780 flow [2022-12-13 17:46:01,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 168 transitions, 1757 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:46:01,481 INFO L231 Difference]: Finished difference. Result has 106 places, 101 transitions, 1109 flow [2022-12-13 17:46:01,481 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=941, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1109, PETRI_PLACES=106, PETRI_TRANSITIONS=101} [2022-12-13 17:46:01,481 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 51 predicate places. [2022-12-13 17:46:01,481 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 101 transitions, 1109 flow [2022-12-13 17:46:01,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 137.5) internal successors, (1100), 8 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:01,482 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:46:01,482 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:46:01,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:46:01,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:46:01,683 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:46:01,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:46:01,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1047344040, now seen corresponding path program 1 times [2022-12-13 17:46:01,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:46:01,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711354759] [2022-12-13 17:46:01,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:46:01,684 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 17:46:01,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:46:01,685 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:46:01,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:46:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:46:01,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 17:46:01,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:46:01,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:46:01,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:46:01,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:46:01,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 19 [2022-12-13 17:46:02,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:46:02,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:46:02,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 62 [2022-12-13 17:46:02,122 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 53 treesize of output 49 [2022-12-13 17:46:03,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:46:03,246 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:46:03,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711354759] [2022-12-13 17:46:03,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711354759] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:46:03,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:46:03,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 17:46:03,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632266277] [2022-12-13 17:46:03,247 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:46:03,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 17:46:03,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:46:03,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 17:46:03,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-12-13 17:46:07,130 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 398 [2022-12-13 17:46:07,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 101 transitions, 1109 flow. Second operand has 10 states, 10 states have (on average 138.6) internal successors, (1386), 10 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:07,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:46:07,131 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 398 [2022-12-13 17:46:07,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:46:24,554 WARN L233 SmtUtils]: Spent 5.33s on a formula simplification. DAG size of input: 59 DAG size of output: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:46:33,908 INFO L130 PetriNetUnfolder]: 3778/6701 cut-off events. [2022-12-13 17:46:33,908 INFO L131 PetriNetUnfolder]: For 20448/20448 co-relation queries the response was YES. [2022-12-13 17:46:33,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26218 conditions, 6701 events. 3778/6701 cut-off events. For 20448/20448 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 51678 event pairs, 717 based on Foata normal form. 408/7109 useless extension candidates. Maximal degree in co-relation 26170. Up to 2905 conditions per place. [2022-12-13 17:46:33,961 INFO L137 encePairwiseOnDemand]: 385/398 looper letters, 162 selfloop transitions, 64 changer transitions 20/248 dead transitions. [2022-12-13 17:46:33,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 248 transitions, 2394 flow [2022-12-13 17:46:33,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 17:46:33,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 17:46:33,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2913 transitions. [2022-12-13 17:46:33,972 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3659547738693467 [2022-12-13 17:46:33,973 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2913 transitions. [2022-12-13 17:46:33,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2913 transitions. [2022-12-13 17:46:33,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:46:33,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2913 transitions. [2022-12-13 17:46:33,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 145.65) internal successors, (2913), 20 states have internal predecessors, (2913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:33,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 398.0) internal successors, (8358), 21 states have internal predecessors, (8358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:33,982 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 398.0) internal successors, (8358), 21 states have internal predecessors, (8358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:33,982 INFO L175 Difference]: Start difference. First operand has 106 places, 101 transitions, 1109 flow. Second operand 20 states and 2913 transitions. [2022-12-13 17:46:33,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 248 transitions, 2394 flow [2022-12-13 17:46:34,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 248 transitions, 2269 flow, removed 30 selfloop flow, removed 4 redundant places. [2022-12-13 17:46:34,036 INFO L231 Difference]: Finished difference. Result has 127 places, 118 transitions, 1415 flow [2022-12-13 17:46:34,037 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=999, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1415, PETRI_PLACES=127, PETRI_TRANSITIONS=118} [2022-12-13 17:46:34,037 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 72 predicate places. [2022-12-13 17:46:34,037 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 118 transitions, 1415 flow [2022-12-13 17:46:34,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 138.6) internal successors, (1386), 10 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:34,038 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:46:34,038 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:46:34,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:46:34,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:46:34,239 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:46:34,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:46:34,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1886044837, now seen corresponding path program 1 times [2022-12-13 17:46:34,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:46:34,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1087682512] [2022-12-13 17:46:34,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:46:34,241 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 17:46:34,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:46:34,244 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:46:34,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:46:34,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:46:34,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 17:46:34,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:46:34,473 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 17:46:34,474 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 17:46:34,560 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 17:46:34,561 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 17:46:34,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:46:34,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 17:46:34,691 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 17:46:34,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 17:46:34,825 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 17:46:34,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:46:34,839 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:46:34,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 62 [2022-12-13 17:46:40,396 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 17:46:40,396 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:46:40,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1087682512] [2022-12-13 17:46:40,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1087682512] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:46:40,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:46:40,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 17:46:40,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737769130] [2022-12-13 17:46:40,397 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:46:40,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 17:46:40,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:46:40,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 17:46:40,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-13 17:46:43,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:46:45,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:46:47,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:46:50,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:46:52,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:46:54,152 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 398 [2022-12-13 17:46:54,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 118 transitions, 1415 flow. Second operand has 8 states, 8 states have (on average 134.25) internal successors, (1074), 8 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:46:54,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:46:54,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 398 [2022-12-13 17:46:54,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:47:05,852 WARN L233 SmtUtils]: Spent 6.61s on a formula simplification. DAG size of input: 50 DAG size of output: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:47:07,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:47:16,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:47:19,066 INFO L130 PetriNetUnfolder]: 4261/7529 cut-off events. [2022-12-13 17:47:19,066 INFO L131 PetriNetUnfolder]: For 53107/53107 co-relation queries the response was YES. [2022-12-13 17:47:19,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33856 conditions, 7529 events. 4261/7529 cut-off events. For 53107/53107 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 58200 event pairs, 2234 based on Foata normal form. 270/7799 useless extension candidates. Maximal degree in co-relation 33802. Up to 3215 conditions per place. [2022-12-13 17:47:19,107 INFO L137 encePairwiseOnDemand]: 389/398 looper letters, 147 selfloop transitions, 45 changer transitions 0/194 dead transitions. [2022-12-13 17:47:19,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 194 transitions, 2338 flow [2022-12-13 17:47:19,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 17:47:19,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 17:47:19,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2073 transitions. [2022-12-13 17:47:19,111 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34723618090452263 [2022-12-13 17:47:19,111 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2073 transitions. [2022-12-13 17:47:19,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2073 transitions. [2022-12-13 17:47:19,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:47:19,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2073 transitions. [2022-12-13 17:47:19,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 138.2) internal successors, (2073), 15 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:19,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 398.0) internal successors, (6368), 16 states have internal predecessors, (6368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:19,116 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 398.0) internal successors, (6368), 16 states have internal predecessors, (6368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:19,116 INFO L175 Difference]: Start difference. First operand has 127 places, 118 transitions, 1415 flow. Second operand 15 states and 2073 transitions. [2022-12-13 17:47:19,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 194 transitions, 2338 flow [2022-12-13 17:47:19,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 194 transitions, 2294 flow, removed 19 selfloop flow, removed 2 redundant places. [2022-12-13 17:47:19,188 INFO L231 Difference]: Finished difference. Result has 142 places, 119 transitions, 1506 flow [2022-12-13 17:47:19,188 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=1371, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1506, PETRI_PLACES=142, PETRI_TRANSITIONS=119} [2022-12-13 17:47:19,188 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 87 predicate places. [2022-12-13 17:47:19,188 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 119 transitions, 1506 flow [2022-12-13 17:47:19,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 134.25) internal successors, (1074), 8 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:19,189 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:47:19,189 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:47:19,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:47:19,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:47:19,390 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:47:19,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:47:19,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1243923342, now seen corresponding path program 2 times [2022-12-13 17:47:19,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:47:19,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [901158984] [2022-12-13 17:47:19,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:47:19,393 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 17:47:19,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:47:19,396 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:47:19,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:47:19,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 17:47:19,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:47:19,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 17:47:19,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:47:19,557 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 17:47:19,557 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 17:47:19,639 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 17:47:19,640 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 17:47:19,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:47:19,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 17:47:19,745 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 17:47:19,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 17:47:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 17:47:19,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:47:19,842 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:47:19,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [901158984] [2022-12-13 17:47:19,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [901158984] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:47:19,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:47:19,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:47:19,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790488409] [2022-12-13 17:47:19,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:47:19,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:47:19,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:47:19,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:47:19,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:47:20,214 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 398 [2022-12-13 17:47:20,214 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 119 transitions, 1506 flow. Second operand has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:20,214 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:47:20,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 398 [2022-12-13 17:47:20,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:47:21,467 INFO L130 PetriNetUnfolder]: 3581/6437 cut-off events. [2022-12-13 17:47:21,467 INFO L131 PetriNetUnfolder]: For 50356/50356 co-relation queries the response was YES. [2022-12-13 17:47:21,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26798 conditions, 6437 events. 3581/6437 cut-off events. For 50356/50356 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 49644 event pairs, 2036 based on Foata normal form. 430/6867 useless extension candidates. Maximal degree in co-relation 26741. Up to 6262 conditions per place. [2022-12-13 17:47:21,499 INFO L137 encePairwiseOnDemand]: 394/398 looper letters, 102 selfloop transitions, 12 changer transitions 0/116 dead transitions. [2022-12-13 17:47:21,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 116 transitions, 1673 flow [2022-12-13 17:47:21,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:47:21,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:47:21,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 599 transitions. [2022-12-13 17:47:21,501 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37625628140703515 [2022-12-13 17:47:21,501 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 599 transitions. [2022-12-13 17:47:21,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 599 transitions. [2022-12-13 17:47:21,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:47:21,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 599 transitions. [2022-12-13 17:47:21,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:21,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 398.0) internal successors, (1990), 5 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:21,503 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 398.0) internal successors, (1990), 5 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:21,503 INFO L175 Difference]: Start difference. First operand has 142 places, 119 transitions, 1506 flow. Second operand 4 states and 599 transitions. [2022-12-13 17:47:21,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 116 transitions, 1673 flow [2022-12-13 17:47:21,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 116 transitions, 1554 flow, removed 3 selfloop flow, removed 15 redundant places. [2022-12-13 17:47:21,550 INFO L231 Difference]: Finished difference. Result has 128 places, 116 transitions, 1350 flow [2022-12-13 17:47:21,550 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=1326, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1350, PETRI_PLACES=128, PETRI_TRANSITIONS=116} [2022-12-13 17:47:21,550 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 73 predicate places. [2022-12-13 17:47:21,550 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 116 transitions, 1350 flow [2022-12-13 17:47:21,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:21,551 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:47:21,551 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:47:21,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:47:21,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:47:21,752 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:47:21,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:47:21,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1333247032, now seen corresponding path program 1 times [2022-12-13 17:47:21,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:47:21,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [552271388] [2022-12-13 17:47:21,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:47:21,755 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 17:47:21,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:47:21,758 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:47:21,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:47:21,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:47:21,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 17:47:21,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:47:22,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:22,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:47:22,232 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 35 treesize of output 31 [2022-12-13 17:47:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:22,515 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:47:22,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [552271388] [2022-12-13 17:47:22,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [552271388] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:47:22,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:47:22,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 17:47:22,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311513432] [2022-12-13 17:47:22,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:47:22,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 17:47:22,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:47:22,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 17:47:22,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-12-13 17:47:25,124 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 398 [2022-12-13 17:47:25,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 116 transitions, 1350 flow. Second operand has 12 states, 12 states have (on average 144.5) internal successors, (1734), 12 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:25,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:47:25,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 398 [2022-12-13 17:47:25,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:47:27,781 INFO L130 PetriNetUnfolder]: 2843/5343 cut-off events. [2022-12-13 17:47:27,781 INFO L131 PetriNetUnfolder]: For 23739/23739 co-relation queries the response was YES. [2022-12-13 17:47:27,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21288 conditions, 5343 events. 2843/5343 cut-off events. For 23739/23739 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 41057 event pairs, 912 based on Foata normal form. 447/5790 useless extension candidates. Maximal degree in co-relation 21237. Up to 2345 conditions per place. [2022-12-13 17:47:27,805 INFO L137 encePairwiseOnDemand]: 389/398 looper letters, 79 selfloop transitions, 81 changer transitions 20/182 dead transitions. [2022-12-13 17:47:27,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 182 transitions, 2021 flow [2022-12-13 17:47:27,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 17:47:27,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 17:47:27,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1825 transitions. [2022-12-13 17:47:27,808 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38211892797319935 [2022-12-13 17:47:27,808 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1825 transitions. [2022-12-13 17:47:27,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1825 transitions. [2022-12-13 17:47:27,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:47:27,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1825 transitions. [2022-12-13 17:47:27,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 152.08333333333334) internal successors, (1825), 12 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:27,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 398.0) internal successors, (5174), 13 states have internal predecessors, (5174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:27,815 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 398.0) internal successors, (5174), 13 states have internal predecessors, (5174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:27,815 INFO L175 Difference]: Start difference. First operand has 128 places, 116 transitions, 1350 flow. Second operand 12 states and 1825 transitions. [2022-12-13 17:47:27,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 182 transitions, 2021 flow [2022-12-13 17:47:27,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 182 transitions, 1944 flow, removed 32 selfloop flow, removed 2 redundant places. [2022-12-13 17:47:27,851 INFO L231 Difference]: Finished difference. Result has 143 places, 124 transitions, 1596 flow [2022-12-13 17:47:27,851 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=1301, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1596, PETRI_PLACES=143, PETRI_TRANSITIONS=124} [2022-12-13 17:47:27,852 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 88 predicate places. [2022-12-13 17:47:27,852 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 124 transitions, 1596 flow [2022-12-13 17:47:27,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 144.5) internal successors, (1734), 12 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:27,852 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:47:27,852 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 1, 1, 1] [2022-12-13 17:47:27,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:47:28,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:47:28,053 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:47:28,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:47:28,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1388455229, now seen corresponding path program 1 times [2022-12-13 17:47:28,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:47:28,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1808188303] [2022-12-13 17:47:28,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:47:28,056 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 17:47:28,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:47:28,058 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:47:28,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:47:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:47:28,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 17:47:28,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:47:28,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 17:47:28,785 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:28,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:47:30,847 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:47:30,847 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:47:30,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1808188303] [2022-12-13 17:47:30,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1808188303] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:47:30,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:47:30,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-12-13 17:47:30,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732918700] [2022-12-13 17:47:30,848 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:47:30,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 17:47:30,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:47:30,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 17:47:30,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-12-13 17:47:42,826 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 398 [2022-12-13 17:47:42,827 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 124 transitions, 1596 flow. Second operand has 18 states, 18 states have (on average 143.05555555555554) internal successors, (2575), 18 states have internal predecessors, (2575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:47:42,827 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:47:42,827 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 398 [2022-12-13 17:47:42,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:47:47,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 17:47:49,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 17:47:51,310 WARN L539 Checker$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 17:47:53,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 17:47:54,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 17:47:56,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 17:47:58,747 WARN L539 Checker$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 17:48:08,677 INFO L130 PetriNetUnfolder]: 5896/10826 cut-off events. [2022-12-13 17:48:08,677 INFO L131 PetriNetUnfolder]: For 64580/64580 co-relation queries the response was YES. [2022-12-13 17:48:08,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47485 conditions, 10826 events. 5896/10826 cut-off events. For 64580/64580 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 87692 event pairs, 3191 based on Foata normal form. 32/10858 useless extension candidates. Maximal degree in co-relation 47428. Up to 3147 conditions per place. [2022-12-13 17:48:08,735 INFO L137 encePairwiseOnDemand]: 392/398 looper letters, 556 selfloop transitions, 48 changer transitions 0/606 dead transitions. [2022-12-13 17:48:08,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 606 transitions, 7975 flow [2022-12-13 17:48:08,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 17:48:08,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 17:48:08,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2830 transitions. [2022-12-13 17:48:08,739 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39503070910106086 [2022-12-13 17:48:08,739 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2830 transitions. [2022-12-13 17:48:08,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2830 transitions. [2022-12-13 17:48:08,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:48:08,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2830 transitions. [2022-12-13 17:48:08,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 157.22222222222223) internal successors, (2830), 18 states have internal predecessors, (2830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:08,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 398.0) internal successors, (7562), 19 states have internal predecessors, (7562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:08,748 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 398.0) internal successors, (7562), 19 states have internal predecessors, (7562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:08,748 INFO L175 Difference]: Start difference. First operand has 143 places, 124 transitions, 1596 flow. Second operand 18 states and 2830 transitions. [2022-12-13 17:48:08,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 606 transitions, 7975 flow [2022-12-13 17:48:08,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 606 transitions, 7522 flow, removed 169 selfloop flow, removed 6 redundant places. [2022-12-13 17:48:08,965 INFO L231 Difference]: Finished difference. Result has 160 places, 134 transitions, 1777 flow [2022-12-13 17:48:08,965 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=1472, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1777, PETRI_PLACES=160, PETRI_TRANSITIONS=134} [2022-12-13 17:48:08,966 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 105 predicate places. [2022-12-13 17:48:08,966 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 134 transitions, 1777 flow [2022-12-13 17:48:08,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 143.05555555555554) internal successors, (2575), 18 states have internal predecessors, (2575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:08,966 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:48:08,966 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:48:08,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:48:09,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:48:09,167 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:48:09,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:48:09,168 INFO L85 PathProgramCache]: Analyzing trace with hash -921420571, now seen corresponding path program 2 times [2022-12-13 17:48:09,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:48:09,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [608462294] [2022-12-13 17:48:09,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:48:09,170 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 17:48:09,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:48:09,173 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:48:09,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:48:09,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 17:48:09,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:48:09,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 17:48:09,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:48:09,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 17:48:09,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 17:48:09,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:48:09,617 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:48:09,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [608462294] [2022-12-13 17:48:09,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [608462294] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:48:09,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:48:09,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:48:09,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54464701] [2022-12-13 17:48:09,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:48:09,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:48:09,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:48:09,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:48:09,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:48:09,869 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 398 [2022-12-13 17:48:09,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 134 transitions, 1777 flow. Second operand has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:09,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:48:09,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 398 [2022-12-13 17:48:09,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:48:11,294 INFO L130 PetriNetUnfolder]: 3720/6954 cut-off events. [2022-12-13 17:48:11,294 INFO L131 PetriNetUnfolder]: For 47764/47764 co-relation queries the response was YES. [2022-12-13 17:48:11,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26070 conditions, 6954 events. 3720/6954 cut-off events. For 47764/47764 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 52601 event pairs, 1995 based on Foata normal form. 1280/8234 useless extension candidates. Maximal degree in co-relation 26005. Up to 6633 conditions per place. [2022-12-13 17:48:11,351 INFO L137 encePairwiseOnDemand]: 394/398 looper letters, 89 selfloop transitions, 32 changer transitions 0/123 dead transitions. [2022-12-13 17:48:11,351 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 123 transitions, 1893 flow [2022-12-13 17:48:11,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:48:11,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 17:48:11,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 613 transitions. [2022-12-13 17:48:11,353 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3850502512562814 [2022-12-13 17:48:11,353 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 613 transitions. [2022-12-13 17:48:11,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 613 transitions. [2022-12-13 17:48:11,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:48:11,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 613 transitions. [2022-12-13 17:48:11,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 153.25) internal successors, (613), 4 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:11,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 398.0) internal successors, (1990), 5 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:11,355 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 398.0) internal successors, (1990), 5 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:11,355 INFO L175 Difference]: Start difference. First operand has 160 places, 134 transitions, 1777 flow. Second operand 4 states and 613 transitions. [2022-12-13 17:48:11,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 123 transitions, 1893 flow [2022-12-13 17:48:11,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 123 transitions, 1630 flow, removed 28 selfloop flow, removed 17 redundant places. [2022-12-13 17:48:11,471 INFO L231 Difference]: Finished difference. Result has 143 places, 123 transitions, 1452 flow [2022-12-13 17:48:11,471 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=1388, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1452, PETRI_PLACES=143, PETRI_TRANSITIONS=123} [2022-12-13 17:48:11,471 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 88 predicate places. [2022-12-13 17:48:11,472 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 123 transitions, 1452 flow [2022-12-13 17:48:11,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:11,472 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:48:11,472 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-12-13 17:48:11,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:48:11,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:48:11,673 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:48:11,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:48:11,674 INFO L85 PathProgramCache]: Analyzing trace with hash 741449695, now seen corresponding path program 3 times [2022-12-13 17:48:11,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:48:11,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1222316636] [2022-12-13 17:48:11,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:48:11,675 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 17:48:11,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:48:11,678 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:48:11,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:48:11,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 17:48:11,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:48:11,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 17:48:11,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:48:11,968 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 17:48:11,969 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 17:48:12,616 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 17:48:12,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:48:15,626 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 17:48:15,626 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:48:15,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1222316636] [2022-12-13 17:48:15,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1222316636] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:48:15,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:48:15,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 17:48:15,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399994909] [2022-12-13 17:48:15,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:48:15,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 17:48:15,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:48:15,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 17:48:15,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-12-13 17:48:34,195 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 398 [2022-12-13 17:48:34,197 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 123 transitions, 1452 flow. Second operand has 24 states, 24 states have (on average 143.0) internal successors, (3432), 24 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:48:34,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:48:34,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 398 [2022-12-13 17:48:34,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:48:45,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 17:48:47,563 WARN L539 Checker$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 17:48:49,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 17:48:51,569 WARN L539 Checker$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 17:48:53,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 17:48:55,575 WARN L539 Checker$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 17:48:57,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 17:48:59,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 17:49:01,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 17:49:03,282 WARN L539 Checker$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 17:49:12,108 INFO L130 PetriNetUnfolder]: 3732/6978 cut-off events. [2022-12-13 17:49:12,109 INFO L131 PetriNetUnfolder]: For 17113/17113 co-relation queries the response was YES. [2022-12-13 17:49:12,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21564 conditions, 6978 events. 3732/6978 cut-off events. For 17113/17113 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 52578 event pairs, 1995 based on Foata normal form. 12/6990 useless extension candidates. Maximal degree in co-relation 21508. Up to 1776 conditions per place. [2022-12-13 17:49:12,141 INFO L137 encePairwiseOnDemand]: 392/398 looper letters, 347 selfloop transitions, 72 changer transitions 0/421 dead transitions. [2022-12-13 17:49:12,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 421 transitions, 4584 flow [2022-12-13 17:49:12,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 17:49:12,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 17:49:12,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3640 transitions. [2022-12-13 17:49:12,146 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38107202680067004 [2022-12-13 17:49:12,146 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3640 transitions. [2022-12-13 17:49:12,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3640 transitions. [2022-12-13 17:49:12,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:49:12,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3640 transitions. [2022-12-13 17:49:12,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 151.66666666666666) internal successors, (3640), 24 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:12,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 398.0) internal successors, (9950), 25 states have internal predecessors, (9950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:12,154 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 398.0) internal successors, (9950), 25 states have internal predecessors, (9950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:12,154 INFO L175 Difference]: Start difference. First operand has 143 places, 123 transitions, 1452 flow. Second operand 24 states and 3640 transitions. [2022-12-13 17:49:12,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 421 transitions, 4584 flow [2022-12-13 17:49:12,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 421 transitions, 4496 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 17:49:12,179 INFO L231 Difference]: Finished difference. Result has 177 places, 150 transitions, 1938 flow [2022-12-13 17:49:12,179 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1938, PETRI_PLACES=177, PETRI_TRANSITIONS=150} [2022-12-13 17:49:12,180 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 122 predicate places. [2022-12-13 17:49:12,180 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 150 transitions, 1938 flow [2022-12-13 17:49:12,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 143.0) internal successors, (3432), 24 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:12,180 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:49:12,180 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:12,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:12,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:12,382 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:49:12,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:12,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1804888025, now seen corresponding path program 1 times [2022-12-13 17:49:12,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:49:12,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [529254318] [2022-12-13 17:49:12,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:12,385 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 17:49:12,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:49:12,388 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:12,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:12,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:49:12,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 17:49:12,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:12,650 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:49:12,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 133 treesize of output 28 [2022-12-13 17:49:12,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:49:12,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:49:12,869 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:49:12,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 135 treesize of output 30 [2022-12-13 17:49:13,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:49:13,117 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:49:13,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [529254318] [2022-12-13 17:49:13,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [529254318] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:49:13,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:49:13,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-12-13 17:49:13,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305676789] [2022-12-13 17:49:13,118 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:49:13,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 17:49:13,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:49:13,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 17:49:13,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 17:49:14,060 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 398 [2022-12-13 17:49:14,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 150 transitions, 1938 flow. Second operand has 10 states, 10 states have (on average 148.0) internal successors, (1480), 10 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:14,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:49:14,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 398 [2022-12-13 17:49:14,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:49:16,184 INFO L130 PetriNetUnfolder]: 3984/7227 cut-off events. [2022-12-13 17:49:16,184 INFO L131 PetriNetUnfolder]: For 14584/14584 co-relation queries the response was YES. [2022-12-13 17:49:16,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22628 conditions, 7227 events. 3984/7227 cut-off events. For 14584/14584 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 52917 event pairs, 559 based on Foata normal form. 3/7230 useless extension candidates. Maximal degree in co-relation 22558. Up to 5390 conditions per place. [2022-12-13 17:49:16,221 INFO L137 encePairwiseOnDemand]: 389/398 looper letters, 88 selfloop transitions, 80 changer transitions 11/181 dead transitions. [2022-12-13 17:49:16,221 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 181 transitions, 2419 flow [2022-12-13 17:49:16,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 17:49:16,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 17:49:16,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1503 transitions. [2022-12-13 17:49:16,224 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37763819095477386 [2022-12-13 17:49:16,224 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1503 transitions. [2022-12-13 17:49:16,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1503 transitions. [2022-12-13 17:49:16,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:49:16,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1503 transitions. [2022-12-13 17:49:16,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 150.3) internal successors, (1503), 10 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:16,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 398.0) internal successors, (4378), 11 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:16,227 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 398.0) internal successors, (4378), 11 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:16,227 INFO L175 Difference]: Start difference. First operand has 177 places, 150 transitions, 1938 flow. Second operand 10 states and 1503 transitions. [2022-12-13 17:49:16,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 181 transitions, 2419 flow [2022-12-13 17:49:16,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 181 transitions, 2278 flow, removed 30 selfloop flow, removed 9 redundant places. [2022-12-13 17:49:16,260 INFO L231 Difference]: Finished difference. Result has 179 places, 147 transitions, 1946 flow [2022-12-13 17:49:16,260 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=1797, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1946, PETRI_PLACES=179, PETRI_TRANSITIONS=147} [2022-12-13 17:49:16,260 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 124 predicate places. [2022-12-13 17:49:16,261 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 147 transitions, 1946 flow [2022-12-13 17:49:16,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 148.0) internal successors, (1480), 10 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:16,261 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:49:16,261 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:16,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:16,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:16,462 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:49:16,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:16,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1189749165, now seen corresponding path program 2 times [2022-12-13 17:49:16,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:49:16,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963738140] [2022-12-13 17:49:16,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:49:16,465 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 17:49:16,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:49:16,467 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:16,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:16,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:49:16,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:49:16,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 17:49:16,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 17:49:16,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:49:16,710 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:49:16,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1963738140] [2022-12-13 17:49:16,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1963738140] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:49:16,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:49:16,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 17:49:16,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530156477] [2022-12-13 17:49:16,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:49:16,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:49:16,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:49:16,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:49:16,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:49:16,764 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 398 [2022-12-13 17:49:16,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 147 transitions, 1946 flow. Second operand has 5 states, 5 states have (on average 155.6) internal successors, (778), 5 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:16,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:49:16,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 398 [2022-12-13 17:49:16,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:49:18,693 INFO L130 PetriNetUnfolder]: 4987/9468 cut-off events. [2022-12-13 17:49:18,694 INFO L131 PetriNetUnfolder]: For 22983/22983 co-relation queries the response was YES. [2022-12-13 17:49:18,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29334 conditions, 9468 events. 4987/9468 cut-off events. For 22983/22983 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 72082 event pairs, 2048 based on Foata normal form. 88/9556 useless extension candidates. Maximal degree in co-relation 29261. Up to 6217 conditions per place. [2022-12-13 17:49:18,743 INFO L137 encePairwiseOnDemand]: 393/398 looper letters, 168 selfloop transitions, 16 changer transitions 8/192 dead transitions. [2022-12-13 17:49:18,743 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 192 transitions, 2677 flow [2022-12-13 17:49:18,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:49:18,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:49:18,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 803 transitions. [2022-12-13 17:49:18,745 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4035175879396985 [2022-12-13 17:49:18,745 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 803 transitions. [2022-12-13 17:49:18,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 803 transitions. [2022-12-13 17:49:18,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:49:18,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 803 transitions. [2022-12-13 17:49:18,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 160.6) internal successors, (803), 5 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:18,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 398.0) internal successors, (2388), 6 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:18,747 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 398.0) internal successors, (2388), 6 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:18,748 INFO L175 Difference]: Start difference. First operand has 179 places, 147 transitions, 1946 flow. Second operand 5 states and 803 transitions. [2022-12-13 17:49:18,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 192 transitions, 2677 flow [2022-12-13 17:49:18,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 192 transitions, 2556 flow, removed 7 selfloop flow, removed 8 redundant places. [2022-12-13 17:49:18,822 INFO L231 Difference]: Finished difference. Result has 176 places, 151 transitions, 1972 flow [2022-12-13 17:49:18,822 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=1853, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1972, PETRI_PLACES=176, PETRI_TRANSITIONS=151} [2022-12-13 17:49:18,822 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 121 predicate places. [2022-12-13 17:49:18,823 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 151 transitions, 1972 flow [2022-12-13 17:49:18,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 155.6) internal successors, (778), 5 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:18,823 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:49:18,823 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:18,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:19,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:19,024 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:49:19,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:19,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1619457020, now seen corresponding path program 1 times [2022-12-13 17:49:19,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:49:19,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706480736] [2022-12-13 17:49:19,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:49:19,027 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 17:49:19,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:49:19,030 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:19,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:49:19,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 17:49:19,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:19,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 17:49:19,236 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:49:19,236 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:49:19,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706480736] [2022-12-13 17:49:19,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706480736] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:49:19,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:49:19,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 17:49:19,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35469074] [2022-12-13 17:49:19,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:49:19,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:49:19,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:49:19,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:49:19,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:49:19,327 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 398 [2022-12-13 17:49:19,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 151 transitions, 1972 flow. Second operand has 5 states, 5 states have (on average 155.6) internal successors, (778), 5 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:19,327 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:49:19,327 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 398 [2022-12-13 17:49:19,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:49:21,621 INFO L130 PetriNetUnfolder]: 5435/10396 cut-off events. [2022-12-13 17:49:21,621 INFO L131 PetriNetUnfolder]: For 29707/29707 co-relation queries the response was YES. [2022-12-13 17:49:21,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36878 conditions, 10396 events. 5435/10396 cut-off events. For 29707/29707 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 81705 event pairs, 1918 based on Foata normal form. 176/10572 useless extension candidates. Maximal degree in co-relation 36804. Up to 6163 conditions per place. [2022-12-13 17:49:21,689 INFO L137 encePairwiseOnDemand]: 393/398 looper letters, 171 selfloop transitions, 18 changer transitions 14/203 dead transitions. [2022-12-13 17:49:21,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 203 transitions, 2794 flow [2022-12-13 17:49:21,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:49:21,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:49:21,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 805 transitions. [2022-12-13 17:49:21,692 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4045226130653266 [2022-12-13 17:49:21,692 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 805 transitions. [2022-12-13 17:49:21,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 805 transitions. [2022-12-13 17:49:21,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:49:21,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 805 transitions. [2022-12-13 17:49:21,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 161.0) internal successors, (805), 5 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:21,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 398.0) internal successors, (2388), 6 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:21,695 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 398.0) internal successors, (2388), 6 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:21,695 INFO L175 Difference]: Start difference. First operand has 176 places, 151 transitions, 1972 flow. Second operand 5 states and 805 transitions. [2022-12-13 17:49:21,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 203 transitions, 2794 flow [2022-12-13 17:49:21,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 203 transitions, 2661 flow, removed 47 selfloop flow, removed 2 redundant places. [2022-12-13 17:49:21,831 INFO L231 Difference]: Finished difference. Result has 180 places, 154 transitions, 2014 flow [2022-12-13 17:49:21,831 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=1907, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2014, PETRI_PLACES=180, PETRI_TRANSITIONS=154} [2022-12-13 17:49:21,831 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 125 predicate places. [2022-12-13 17:49:21,831 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 154 transitions, 2014 flow [2022-12-13 17:49:21,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 155.6) internal successors, (778), 5 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:21,832 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:49:21,832 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:21,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:22,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:22,033 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:49:22,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:22,034 INFO L85 PathProgramCache]: Analyzing trace with hash 363261252, now seen corresponding path program 2 times [2022-12-13 17:49:22,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:49:22,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329970886] [2022-12-13 17:49:22,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:49:22,036 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 17:49:22,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:49:22,040 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:22,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:22,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:49:22,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:49:22,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:49:22,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:22,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 17:49:22,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:49:22,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 17:49:22,494 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:49:22,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329970886] [2022-12-13 17:49:22,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329970886] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:49:22,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:49:22,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-12-13 17:49:22,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988561456] [2022-12-13 17:49:22,494 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:49:22,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 17:49:22,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:49:22,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 17:49:22,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-12-13 17:49:22,602 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 398 [2022-12-13 17:49:22,603 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 154 transitions, 2014 flow. Second operand has 10 states, 10 states have (on average 152.4) internal successors, (1524), 10 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:22,603 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:49:22,603 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 398 [2022-12-13 17:49:22,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:49:26,416 INFO L130 PetriNetUnfolder]: 7632/14244 cut-off events. [2022-12-13 17:49:26,416 INFO L131 PetriNetUnfolder]: For 42336/42336 co-relation queries the response was YES. [2022-12-13 17:49:26,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55279 conditions, 14244 events. 7632/14244 cut-off events. For 42336/42336 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 113494 event pairs, 932 based on Foata normal form. 410/14654 useless extension candidates. Maximal degree in co-relation 55203. Up to 4892 conditions per place. [2022-12-13 17:49:26,583 INFO L137 encePairwiseOnDemand]: 392/398 looper letters, 192 selfloop transitions, 42 changer transitions 5/239 dead transitions. [2022-12-13 17:49:26,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 239 transitions, 3194 flow [2022-12-13 17:49:26,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 17:49:26,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 17:49:26,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1569 transitions. [2022-12-13 17:49:26,588 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39422110552763817 [2022-12-13 17:49:26,588 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1569 transitions. [2022-12-13 17:49:26,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1569 transitions. [2022-12-13 17:49:26,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:49:26,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1569 transitions. [2022-12-13 17:49:26,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 156.9) internal successors, (1569), 10 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:26,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 398.0) internal successors, (4378), 11 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:26,596 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 398.0) internal successors, (4378), 11 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:26,596 INFO L175 Difference]: Start difference. First operand has 180 places, 154 transitions, 2014 flow. Second operand 10 states and 1569 transitions. [2022-12-13 17:49:26,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 239 transitions, 3194 flow [2022-12-13 17:49:26,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 239 transitions, 3023 flow, removed 59 selfloop flow, removed 2 redundant places. [2022-12-13 17:49:26,867 INFO L231 Difference]: Finished difference. Result has 191 places, 184 transitions, 2367 flow [2022-12-13 17:49:26,868 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=1943, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2367, PETRI_PLACES=191, PETRI_TRANSITIONS=184} [2022-12-13 17:49:26,868 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 136 predicate places. [2022-12-13 17:49:26,868 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 184 transitions, 2367 flow [2022-12-13 17:49:26,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 152.4) internal successors, (1524), 10 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:26,868 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:49:26,868 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:26,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:27,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:27,070 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:49:27,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:27,071 INFO L85 PathProgramCache]: Analyzing trace with hash -553308942, now seen corresponding path program 3 times [2022-12-13 17:49:27,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:49:27,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [785711645] [2022-12-13 17:49:27,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:49:27,074 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 17:49:27,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:49:27,078 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:27,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:27,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 17:49:27,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:49:27,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 17:49:27,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 17:49:27,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:49:27,419 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:49:27,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [785711645] [2022-12-13 17:49:27,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [785711645] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:49:27,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:49:27,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 17:49:27,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074192223] [2022-12-13 17:49:27,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:49:27,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:49:27,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:49:27,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:49:27,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:49:27,500 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 398 [2022-12-13 17:49:27,501 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 184 transitions, 2367 flow. Second operand has 5 states, 5 states have (on average 154.6) internal successors, (773), 5 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:27,501 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:49:27,501 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 398 [2022-12-13 17:49:27,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:49:30,707 INFO L130 PetriNetUnfolder]: 8064/15248 cut-off events. [2022-12-13 17:49:30,707 INFO L131 PetriNetUnfolder]: For 76342/76342 co-relation queries the response was YES. [2022-12-13 17:49:30,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69747 conditions, 15248 events. 8064/15248 cut-off events. For 76342/76342 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 122973 event pairs, 3386 based on Foata normal form. 264/15512 useless extension candidates. Maximal degree in co-relation 69667. Up to 9378 conditions per place. [2022-12-13 17:49:30,850 INFO L137 encePairwiseOnDemand]: 392/398 looper letters, 172 selfloop transitions, 61 changer transitions 8/241 dead transitions. [2022-12-13 17:49:30,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 241 transitions, 3382 flow [2022-12-13 17:49:30,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:49:30,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:49:30,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 801 transitions. [2022-12-13 17:49:30,853 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40251256281407033 [2022-12-13 17:49:30,853 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 801 transitions. [2022-12-13 17:49:30,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 801 transitions. [2022-12-13 17:49:30,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:49:30,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 801 transitions. [2022-12-13 17:49:30,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 160.2) internal successors, (801), 5 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:30,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 398.0) internal successors, (2388), 6 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:30,856 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 398.0) internal successors, (2388), 6 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:30,856 INFO L175 Difference]: Start difference. First operand has 191 places, 184 transitions, 2367 flow. Second operand 5 states and 801 transitions. [2022-12-13 17:49:30,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 241 transitions, 3382 flow [2022-12-13 17:49:31,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 241 transitions, 3338 flow, removed 22 selfloop flow, removed 0 redundant places. [2022-12-13 17:49:31,239 INFO L231 Difference]: Finished difference. Result has 198 places, 207 transitions, 2833 flow [2022-12-13 17:49:31,239 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=2331, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2833, PETRI_PLACES=198, PETRI_TRANSITIONS=207} [2022-12-13 17:49:31,239 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 143 predicate places. [2022-12-13 17:49:31,239 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 207 transitions, 2833 flow [2022-12-13 17:49:31,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 154.6) internal successors, (773), 5 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:31,239 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:49:31,239 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:31,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:31,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:31,441 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:49:31,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:31,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1720934720, now seen corresponding path program 4 times [2022-12-13 17:49:31,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:49:31,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [701877743] [2022-12-13 17:49:31,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:49:31,442 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 17:49:31,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:49:31,444 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:31,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:31,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:49:31,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:49:31,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 17:49:31,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:31,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 17:49:31,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:49:31,649 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:49:31,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [701877743] [2022-12-13 17:49:31,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [701877743] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:49:31,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:49:31,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 17:49:31,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571935168] [2022-12-13 17:49:31,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:49:31,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:49:31,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:49:31,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:49:31,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:49:31,696 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 398 [2022-12-13 17:49:31,697 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 207 transitions, 2833 flow. Second operand has 5 states, 5 states have (on average 154.6) internal successors, (773), 5 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:31,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:49:31,697 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 398 [2022-12-13 17:49:31,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:49:35,454 INFO L130 PetriNetUnfolder]: 8248/15276 cut-off events. [2022-12-13 17:49:35,454 INFO L131 PetriNetUnfolder]: For 89685/89685 co-relation queries the response was YES. [2022-12-13 17:49:35,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74473 conditions, 15276 events. 8248/15276 cut-off events. For 89685/89685 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 120600 event pairs, 3462 based on Foata normal form. 328/15604 useless extension candidates. Maximal degree in co-relation 74389. Up to 9706 conditions per place. [2022-12-13 17:49:35,624 INFO L137 encePairwiseOnDemand]: 393/398 looper letters, 179 selfloop transitions, 70 changer transitions 0/249 dead transitions. [2022-12-13 17:49:35,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 249 transitions, 3764 flow [2022-12-13 17:49:35,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:49:35,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:49:35,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 796 transitions. [2022-12-13 17:49:35,626 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4 [2022-12-13 17:49:35,626 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 796 transitions. [2022-12-13 17:49:35,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 796 transitions. [2022-12-13 17:49:35,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:49:35,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 796 transitions. [2022-12-13 17:49:35,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 159.2) internal successors, (796), 5 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:35,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 398.0) internal successors, (2388), 6 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:35,629 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 398.0) internal successors, (2388), 6 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:35,629 INFO L175 Difference]: Start difference. First operand has 198 places, 207 transitions, 2833 flow. Second operand 5 states and 796 transitions. [2022-12-13 17:49:35,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 249 transitions, 3764 flow [2022-12-13 17:49:36,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 249 transitions, 3660 flow, removed 23 selfloop flow, removed 2 redundant places. [2022-12-13 17:49:36,005 INFO L231 Difference]: Finished difference. Result has 200 places, 216 transitions, 3042 flow [2022-12-13 17:49:36,006 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=2760, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3042, PETRI_PLACES=200, PETRI_TRANSITIONS=216} [2022-12-13 17:49:36,006 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 145 predicate places. [2022-12-13 17:49:36,006 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 216 transitions, 3042 flow [2022-12-13 17:49:36,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 154.6) internal successors, (773), 5 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:36,006 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:49:36,006 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:36,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:36,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:36,207 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:49:36,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:36,208 INFO L85 PathProgramCache]: Analyzing trace with hash -715736152, now seen corresponding path program 5 times [2022-12-13 17:49:36,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:49:36,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [743964765] [2022-12-13 17:49:36,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:49:36,210 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 17:49:36,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:49:36,213 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:36,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:36,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:49:36,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:49:36,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 17:49:36,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:36,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 17:49:36,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:49:36,424 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:49:36,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [743964765] [2022-12-13 17:49:36,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [743964765] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:49:36,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:49:36,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 17:49:36,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335241399] [2022-12-13 17:49:36,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:49:36,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:49:36,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:49:36,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:49:36,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:49:36,461 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 398 [2022-12-13 17:49:36,461 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 216 transitions, 3042 flow. Second operand has 5 states, 5 states have (on average 154.6) internal successors, (773), 5 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:36,461 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:49:36,461 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 398 [2022-12-13 17:49:36,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:49:39,921 INFO L130 PetriNetUnfolder]: 7984/15012 cut-off events. [2022-12-13 17:49:39,921 INFO L131 PetriNetUnfolder]: For 86892/86892 co-relation queries the response was YES. [2022-12-13 17:49:40,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73359 conditions, 15012 events. 7984/15012 cut-off events. For 86892/86892 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 120450 event pairs, 3733 based on Foata normal form. 264/15276 useless extension candidates. Maximal degree in co-relation 73275. Up to 12289 conditions per place. [2022-12-13 17:49:40,066 INFO L137 encePairwiseOnDemand]: 392/398 looper letters, 200 selfloop transitions, 51 changer transitions 8/259 dead transitions. [2022-12-13 17:49:40,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 259 transitions, 3992 flow [2022-12-13 17:49:40,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:49:40,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:49:40,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 955 transitions. [2022-12-13 17:49:40,069 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3999162479061977 [2022-12-13 17:49:40,069 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 955 transitions. [2022-12-13 17:49:40,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 955 transitions. [2022-12-13 17:49:40,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:49:40,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 955 transitions. [2022-12-13 17:49:40,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 159.16666666666666) internal successors, (955), 6 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:40,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 398.0) internal successors, (2786), 7 states have internal predecessors, (2786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:40,072 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 398.0) internal successors, (2786), 7 states have internal predecessors, (2786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:40,072 INFO L175 Difference]: Start difference. First operand has 200 places, 216 transitions, 3042 flow. Second operand 6 states and 955 transitions. [2022-12-13 17:49:40,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 259 transitions, 3992 flow [2022-12-13 17:49:40,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 259 transitions, 3822 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-12-13 17:49:40,687 INFO L231 Difference]: Finished difference. Result has 204 places, 238 transitions, 3358 flow [2022-12-13 17:49:40,687 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=2894, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3358, PETRI_PLACES=204, PETRI_TRANSITIONS=238} [2022-12-13 17:49:40,687 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 149 predicate places. [2022-12-13 17:49:40,687 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 238 transitions, 3358 flow [2022-12-13 17:49:40,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 154.6) internal successors, (773), 5 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:40,688 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:49:40,688 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:40,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 17:49:40,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:40,889 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:49:40,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:40,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1920007250, now seen corresponding path program 6 times [2022-12-13 17:49:40,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:49:40,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1422030531] [2022-12-13 17:49:40,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:49:40,891 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 17:49:40,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:49:40,894 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:40,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:41,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 17:49:41,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:49:41,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:49:41,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:41,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 17:49:41,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:49:41,213 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:49:41,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1422030531] [2022-12-13 17:49:41,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1422030531] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:49:41,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:49:41,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 17:49:41,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364079025] [2022-12-13 17:49:41,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:49:41,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:49:41,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:49:41,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:49:41,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:49:41,272 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 398 [2022-12-13 17:49:41,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 238 transitions, 3358 flow. Second operand has 5 states, 5 states have (on average 156.6) internal successors, (783), 5 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:41,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:49:41,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 398 [2022-12-13 17:49:41,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:49:44,373 INFO L130 PetriNetUnfolder]: 7266/13413 cut-off events. [2022-12-13 17:49:44,373 INFO L131 PetriNetUnfolder]: For 76248/76248 co-relation queries the response was YES. [2022-12-13 17:49:44,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65783 conditions, 13413 events. 7266/13413 cut-off events. For 76248/76248 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 103318 event pairs, 3097 based on Foata normal form. 164/13577 useless extension candidates. Maximal degree in co-relation 65697. Up to 11230 conditions per place. [2022-12-13 17:49:44,479 INFO L137 encePairwiseOnDemand]: 393/398 looper letters, 192 selfloop transitions, 60 changer transitions 0/252 dead transitions. [2022-12-13 17:49:44,479 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 252 transitions, 3945 flow [2022-12-13 17:49:44,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:49:44,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:49:44,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 804 transitions. [2022-12-13 17:49:44,482 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4040201005025126 [2022-12-13 17:49:44,482 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 804 transitions. [2022-12-13 17:49:44,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 804 transitions. [2022-12-13 17:49:44,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:49:44,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 804 transitions. [2022-12-13 17:49:44,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 160.8) internal successors, (804), 5 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:44,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 398.0) internal successors, (2388), 6 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:44,484 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 398.0) internal successors, (2388), 6 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:44,484 INFO L175 Difference]: Start difference. First operand has 204 places, 238 transitions, 3358 flow. Second operand 5 states and 804 transitions. [2022-12-13 17:49:44,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 252 transitions, 3945 flow [2022-12-13 17:49:44,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 252 transitions, 3690 flow, removed 32 selfloop flow, removed 8 redundant places. [2022-12-13 17:49:44,924 INFO L231 Difference]: Finished difference. Result has 200 places, 242 transitions, 3300 flow [2022-12-13 17:49:44,924 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=3111, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3300, PETRI_PLACES=200, PETRI_TRANSITIONS=242} [2022-12-13 17:49:44,925 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 145 predicate places. [2022-12-13 17:49:44,925 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 242 transitions, 3300 flow [2022-12-13 17:49:44,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.6) internal successors, (783), 5 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:44,925 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:49:44,925 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:44,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 17:49:45,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:45,126 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:49:45,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:45,127 INFO L85 PathProgramCache]: Analyzing trace with hash 597049035, now seen corresponding path program 3 times [2022-12-13 17:49:45,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:49:45,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1164754309] [2022-12-13 17:49:45,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:49:45,129 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 17:49:45,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:49:45,131 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:45,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-12-13 17:49:45,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 17:49:45,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:49:45,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:49:45,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:45,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 17:49:45,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:49:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 17:49:45,533 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:49:45,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1164754309] [2022-12-13 17:49:45,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1164754309] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:49:45,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:49:45,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-12-13 17:49:45,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326896849] [2022-12-13 17:49:45,534 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:49:45,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 17:49:45,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:49:45,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 17:49:45,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-12-13 17:49:45,692 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 398 [2022-12-13 17:49:45,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 242 transitions, 3300 flow. Second operand has 10 states, 10 states have (on average 152.8) internal successors, (1528), 10 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:45,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:49:45,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 398 [2022-12-13 17:49:45,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:49:50,643 INFO L130 PetriNetUnfolder]: 11817/21868 cut-off events. [2022-12-13 17:49:50,643 INFO L131 PetriNetUnfolder]: For 105531/105531 co-relation queries the response was YES. [2022-12-13 17:49:50,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100646 conditions, 21868 events. 11817/21868 cut-off events. For 105531/105531 co-relation queries the response was YES. Maximal size of possible extension queue 720. Compared 184949 event pairs, 1072 based on Foata normal form. 656/22524 useless extension candidates. Maximal degree in co-relation 100564. Up to 8004 conditions per place. [2022-12-13 17:49:50,920 INFO L137 encePairwiseOnDemand]: 392/398 looper letters, 239 selfloop transitions, 90 changer transitions 6/335 dead transitions. [2022-12-13 17:49:50,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 335 transitions, 4756 flow [2022-12-13 17:49:50,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 17:49:50,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 17:49:50,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1579 transitions. [2022-12-13 17:49:50,924 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39673366834170853 [2022-12-13 17:49:50,924 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1579 transitions. [2022-12-13 17:49:50,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1579 transitions. [2022-12-13 17:49:50,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:49:50,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1579 transitions. [2022-12-13 17:49:50,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 157.9) internal successors, (1579), 10 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:50,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 398.0) internal successors, (4378), 11 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:50,930 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 398.0) internal successors, (4378), 11 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:50,930 INFO L175 Difference]: Start difference. First operand has 200 places, 242 transitions, 3300 flow. Second operand 10 states and 1579 transitions. [2022-12-13 17:49:50,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 335 transitions, 4756 flow [2022-12-13 17:49:51,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 335 transitions, 4607 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-12-13 17:49:51,873 INFO L231 Difference]: Finished difference. Result has 211 places, 266 transitions, 3777 flow [2022-12-13 17:49:51,873 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=3193, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3777, PETRI_PLACES=211, PETRI_TRANSITIONS=266} [2022-12-13 17:49:51,874 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 156 predicate places. [2022-12-13 17:49:51,874 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 266 transitions, 3777 flow [2022-12-13 17:49:51,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 152.8) internal successors, (1528), 10 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:51,874 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:49:51,874 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:51,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-12-13 17:49:52,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:52,075 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:49:52,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:52,076 INFO L85 PathProgramCache]: Analyzing trace with hash -539645527, now seen corresponding path program 4 times [2022-12-13 17:49:52,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:49:52,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1181419577] [2022-12-13 17:49:52,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:49:52,079 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 17:49:52,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:49:52,082 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:52,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-12-13 17:49:52,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:49:52,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:49:52,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 17:49:52,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:49:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 17:49:52,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:49:52,347 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:49:52,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1181419577] [2022-12-13 17:49:52,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1181419577] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:49:52,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:49:52,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 17:49:52,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490721447] [2022-12-13 17:49:52,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:49:52,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:49:52,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:49:52,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:49:52,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:49:52,420 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 398 [2022-12-13 17:49:52,420 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 266 transitions, 3777 flow. Second operand has 5 states, 5 states have (on average 154.6) internal successors, (773), 5 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:52,420 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:49:52,420 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 398 [2022-12-13 17:49:52,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:49:57,515 INFO L130 PetriNetUnfolder]: 12369/22912 cut-off events. [2022-12-13 17:49:57,515 INFO L131 PetriNetUnfolder]: For 171938/171938 co-relation queries the response was YES. [2022-12-13 17:49:57,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119613 conditions, 22912 events. 12369/22912 cut-off events. For 171938/171938 co-relation queries the response was YES. Maximal size of possible extension queue 754. Compared 193467 event pairs, 5377 based on Foata normal form. 492/23404 useless extension candidates. Maximal degree in co-relation 119526. Up to 18373 conditions per place. [2022-12-13 17:49:57,779 INFO L137 encePairwiseOnDemand]: 393/398 looper letters, 205 selfloop transitions, 89 changer transitions 0/294 dead transitions. [2022-12-13 17:49:57,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 294 transitions, 4593 flow [2022-12-13 17:49:57,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:49:57,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:49:57,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 798 transitions. [2022-12-13 17:49:57,781 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40100502512562813 [2022-12-13 17:49:57,781 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 798 transitions. [2022-12-13 17:49:57,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 798 transitions. [2022-12-13 17:49:57,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:49:57,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 798 transitions. [2022-12-13 17:49:57,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 159.6) internal successors, (798), 5 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:57,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 398.0) internal successors, (2388), 6 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:57,783 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 398.0) internal successors, (2388), 6 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:57,783 INFO L175 Difference]: Start difference. First operand has 211 places, 266 transitions, 3777 flow. Second operand 5 states and 798 transitions. [2022-12-13 17:49:57,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 294 transitions, 4593 flow [2022-12-13 17:49:59,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 294 transitions, 4404 flow, removed 24 selfloop flow, removed 2 redundant places. [2022-12-13 17:49:59,575 INFO L231 Difference]: Finished difference. Result has 214 places, 273 transitions, 3922 flow [2022-12-13 17:49:59,575 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=3592, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3922, PETRI_PLACES=214, PETRI_TRANSITIONS=273} [2022-12-13 17:49:59,575 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 159 predicate places. [2022-12-13 17:49:59,575 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 273 transitions, 3922 flow [2022-12-13 17:49:59,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 154.6) internal successors, (773), 5 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:49:59,576 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:49:59,576 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:49:59,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-12-13 17:49:59,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:59,777 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:49:59,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:49:59,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1231456355, now seen corresponding path program 5 times [2022-12-13 17:49:59,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:49:59,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216485628] [2022-12-13 17:49:59,780 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:49:59,780 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 17:49:59,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:49:59,783 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:49:59,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-12-13 17:50:00,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:50:00,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:50:00,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:50:00,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:50:00,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 17:50:00,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:50:00,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 17:50:00,249 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:50:00,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216485628] [2022-12-13 17:50:00,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [216485628] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:50:00,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:50:00,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-12-13 17:50:00,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528788020] [2022-12-13 17:50:00,250 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:50:00,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 17:50:00,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:50:00,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 17:50:00,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-12-13 17:50:00,373 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 398 [2022-12-13 17:50:00,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 273 transitions, 3922 flow. Second operand has 10 states, 10 states have (on average 152.4) internal successors, (1524), 10 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:00,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:50:00,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 398 [2022-12-13 17:50:00,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:50:06,448 INFO L130 PetriNetUnfolder]: 12779/23803 cut-off events. [2022-12-13 17:50:06,448 INFO L131 PetriNetUnfolder]: For 166435/166435 co-relation queries the response was YES. [2022-12-13 17:50:06,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119389 conditions, 23803 events. 12779/23803 cut-off events. For 166435/166435 co-relation queries the response was YES. Maximal size of possible extension queue 786. Compared 204198 event pairs, 4983 based on Foata normal form. 738/24541 useless extension candidates. Maximal degree in co-relation 119301. Up to 18312 conditions per place. [2022-12-13 17:50:06,700 INFO L137 encePairwiseOnDemand]: 392/398 looper letters, 221 selfloop transitions, 94 changer transitions 2/317 dead transitions. [2022-12-13 17:50:06,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 317 transitions, 4837 flow [2022-12-13 17:50:06,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 17:50:06,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 17:50:06,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1571 transitions. [2022-12-13 17:50:06,704 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39472361809045226 [2022-12-13 17:50:06,704 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1571 transitions. [2022-12-13 17:50:06,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1571 transitions. [2022-12-13 17:50:06,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:50:06,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1571 transitions. [2022-12-13 17:50:06,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 157.1) internal successors, (1571), 10 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:06,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 398.0) internal successors, (4378), 11 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:06,708 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 398.0) internal successors, (4378), 11 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:06,708 INFO L175 Difference]: Start difference. First operand has 214 places, 273 transitions, 3922 flow. Second operand 10 states and 1571 transitions. [2022-12-13 17:50:06,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 317 transitions, 4837 flow [2022-12-13 17:50:08,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 317 transitions, 4671 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-12-13 17:50:08,492 INFO L231 Difference]: Finished difference. Result has 223 places, 282 transitions, 4090 flow [2022-12-13 17:50:08,493 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=3756, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4090, PETRI_PLACES=223, PETRI_TRANSITIONS=282} [2022-12-13 17:50:08,493 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 168 predicate places. [2022-12-13 17:50:08,493 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 282 transitions, 4090 flow [2022-12-13 17:50:08,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 152.4) internal successors, (1524), 10 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:50:08,493 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:50:08,493 INFO L209 CegarLoopForPetriNet]: trace histogram [16, 1, 1, 1] [2022-12-13 17:50:08,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-12-13 17:50:08,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:50:08,694 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:50:08,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:50:08,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1882571483, now seen corresponding path program 2 times [2022-12-13 17:50:08,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:50:08,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1960186191] [2022-12-13 17:50:08,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:50:08,697 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 17:50:08,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:50:08,699 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:50:08,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-12-13 17:50:08,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:50:08,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:50:08,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 17:50:08,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:50:08,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 17:50:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:10,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:50:16,502 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:50:16,503 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 17:50:16,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1960186191] [2022-12-13 17:50:16,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1960186191] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:50:16,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 17:50:16,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2022-12-13 17:50:16,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993841692] [2022-12-13 17:50:16,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 17:50:16,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 17:50:16,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 17:50:16,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 17:50:16,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 17:51:00,849 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 398 [2022-12-13 17:51:00,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 282 transitions, 4090 flow. Second operand has 36 states, 36 states have (on average 143.02777777777777) internal successors, (5149), 36 states have internal predecessors, (5149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:51:00,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:51:00,851 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 398 [2022-12-13 17:51:00,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:51:17,606 WARN L233 SmtUtils]: Spent 9.14s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:51:20,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 17:51:22,334 WARN L539 Checker$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 17:51:24,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 17:51:26,340 WARN L539 Checker$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 17:51:28,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 17:51:30,346 WARN L539 Checker$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 17:51:32,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 17:51:34,352 WARN L539 Checker$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 17:51:36,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 17:51:38,359 WARN L539 Checker$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 17:51:40,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 17:51:42,365 WARN L539 Checker$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 17:51:44,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 17:51:46,422 WARN L539 Checker$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 17:51:48,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 17:51:50,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 17:52:00,830 WARN L233 SmtUtils]: Spent 8.00s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:52:55,266 INFO L130 PetriNetUnfolder]: 28251/53097 cut-off events. [2022-12-13 17:52:55,266 INFO L131 PetriNetUnfolder]: For 428380/430332 co-relation queries the response was YES. [2022-12-13 17:52:55,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280117 conditions, 53097 events. 28251/53097 cut-off events. For 428380/430332 co-relation queries the response was YES. Maximal size of possible extension queue 848. Compared 484316 event pairs, 13926 based on Foata normal form. 1828/54457 useless extension candidates. Maximal degree in co-relation 280026. Up to 14791 conditions per place. [2022-12-13 17:52:56,094 INFO L137 encePairwiseOnDemand]: 392/398 looper letters, 3143 selfloop transitions, 86 changer transitions 1/3240 dead transitions. [2022-12-13 17:52:56,094 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 3240 transitions, 50669 flow [2022-12-13 17:52:56,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 17:52:56,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-13 17:52:56,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 5636 transitions. [2022-12-13 17:52:56,101 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39335566722501397 [2022-12-13 17:52:56,101 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 5636 transitions. [2022-12-13 17:52:56,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 5636 transitions. [2022-12-13 17:52:56,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:52:56,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 5636 transitions. [2022-12-13 17:52:56,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 156.55555555555554) internal successors, (5636), 36 states have internal predecessors, (5636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:56,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 398.0) internal successors, (14726), 37 states have internal predecessors, (14726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:56,116 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 398.0) internal successors, (14726), 37 states have internal predecessors, (14726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:52:56,116 INFO L175 Difference]: Start difference. First operand has 223 places, 282 transitions, 4090 flow. Second operand 36 states and 5636 transitions. [2022-12-13 17:52:56,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 3240 transitions, 50669 flow [2022-12-13 17:53:02,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 3240 transitions, 46645 flow, removed 716 selfloop flow, removed 8 redundant places. [2022-12-13 17:53:02,836 INFO L231 Difference]: Finished difference. Result has 267 places, 303 transitions, 4441 flow [2022-12-13 17:53:02,836 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=3832, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=4441, PETRI_PLACES=267, PETRI_TRANSITIONS=303} [2022-12-13 17:53:02,836 INFO L288 CegarLoopForPetriNet]: 55 programPoint places, 212 predicate places. [2022-12-13 17:53:02,836 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 303 transitions, 4441 flow [2022-12-13 17:53:02,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 143.02777777777777) internal successors, (5149), 36 states have internal predecessors, (5149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:53:02,837 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:53:02,837 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:53:02,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-12-13 17:53:03,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:53:03,038 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-12-13 17:53:03,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:53:03,039 INFO L85 PathProgramCache]: Analyzing trace with hash 2101039973, now seen corresponding path program 1 times [2022-12-13 17:53:03,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 17:53:03,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [171425427] [2022-12-13 17:53:03,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:53:03,041 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 17:53:03,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 17:53:03,043 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -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 17:53:03,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fd783ad-9ac3-4701-910f-27adbe72ac71/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-12-13 17:53:03,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:53:03,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-13 17:53:03,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:53:03,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 17:53:03,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:53:03,873 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-13 17:53:03,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 256 treesize of output 205 [2022-12-13 17:53:03,898 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:53:03,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 96 [2022-12-13 17:53:04,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 19 [2022-12-13 17:53:04,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 17:53:04,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:53:08,640 INFO L321 Elim1Store]: treesize reduction 597, result has 68.2 percent of original size [2022-12-13 17:53:08,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 16 new quantified variables, introduced 66 case distinctions, treesize of input 2528 treesize of output 2504 [2022-12-13 17:53:12,559 INFO L321 Elim1Store]: treesize reduction 273, result has 70.2 percent of original size [2022-12-13 17:53:12,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 12 disjoint index pairs (out of 66 index pairs), introduced 16 new quantified variables, introduced 54 case distinctions, treesize of input 2214 treesize of output 1686 [2022-12-13 17:53:12,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 17:53:12,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 17:53:12,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 17:53:12,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 17:53:12,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 17:53:12,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 17:53:12,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 17:53:12,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 17:53:12,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 17:53:12,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 17:53:12,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 17:53:12,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 17:53:12,903 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:53:12,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 346 treesize of output 238