./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.recount4.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.recount4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 6270eb1b6253e856606c006aad6f25958ddccc57a27345214c2cf80ca93686b2 --- 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-5e519f3 [2022-11-03 04:02:26,243 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:02:26,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:02:26,305 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:02:26,306 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:02:26,311 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:02:26,313 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:02:26,317 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:02:26,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:02:26,323 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:02:26,328 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:02:26,329 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:02:26,330 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:02:26,331 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:02:26,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:02:26,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:02:26,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:02:26,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:02:26,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:02:26,339 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:02:26,340 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:02:26,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:02:26,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:02:26,344 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:02:26,347 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:02:26,348 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:02:26,348 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:02:26,349 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:02:26,350 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:02:26,351 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:02:26,351 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:02:26,352 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:02:26,353 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:02:26,354 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:02:26,355 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:02:26,355 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:02:26,356 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:02:26,356 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:02:26,357 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:02:26,358 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:02:26,358 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:02:26,359 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 04:02:26,384 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:02:26,384 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:02:26,384 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:02:26,385 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:02:26,385 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:02:26,386 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:02:26,386 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:02:26,386 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:02:26,386 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:02:26,387 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 04:02:26,387 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:02:26,387 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:02:26,387 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 04:02:26,388 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 04:02:26,388 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:02:26,388 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 04:02:26,388 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 04:02:26,389 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 04:02:26,389 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:02:26,390 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 04:02:26,390 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:02:26,390 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:02:26,390 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:02:26,391 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:02:26,391 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:02:26,391 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:02:26,391 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:02:26,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:02:26,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:02:26,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:02:26,392 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:02:26,393 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 04:02:26,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:02:26,393 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:02:26,393 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 04:02:26,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 04:02:26,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:02:26,394 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:02:26,394 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6270eb1b6253e856606c006aad6f25958ddccc57a27345214c2cf80ca93686b2 [2022-11-03 04:02:26,749 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:02:26,787 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:02:26,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:02:26,792 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:02:26,793 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:02:26,795 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.recount4.c [2022-11-03 04:02:26,897 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/data/88156f15d/3ce07626131a4d58b8fe6e5e6122c24e/FLAG043bb7537 [2022-11-03 04:02:27,542 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:02:27,543 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.recount4.c [2022-11-03 04:02:27,551 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/data/88156f15d/3ce07626131a4d58b8fe6e5e6122c24e/FLAG043bb7537 [2022-11-03 04:02:27,898 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/data/88156f15d/3ce07626131a4d58b8fe6e5e6122c24e [2022-11-03 04:02:27,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:02:27,903 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:02:27,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:02:27,907 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:02:27,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:02:27,912 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:02:27" (1/1) ... [2022-11-03 04:02:27,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@215500f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:27, skipping insertion in model container [2022-11-03 04:02:27,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:02:27" (1/1) ... [2022-11-03 04:02:27,930 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:02:27,952 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:02:28,096 WARN L230 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_770e0710-4c50-4b04-ac88-21d124b5a8d9/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.recount4.c[1117,1130] [2022-11-03 04:02:28,136 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:02:28,139 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:02:28,151 WARN L230 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_770e0710-4c50-4b04-ac88-21d124b5a8d9/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.recount4.c[1117,1130] [2022-11-03 04:02:28,164 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:02:28,177 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:02:28,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:28 WrapperNode [2022-11-03 04:02:28,178 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:02:28,179 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:02:28,179 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:02:28,179 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:02:28,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:28" (1/1) ... [2022-11-03 04:02:28,194 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:28" (1/1) ... [2022-11-03 04:02:28,215 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-11-03 04:02:28,215 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:02:28,216 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:02:28,216 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:02:28,217 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:02:28,225 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:28" (1/1) ... [2022-11-03 04:02:28,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:28" (1/1) ... [2022-11-03 04:02:28,228 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:28" (1/1) ... [2022-11-03 04:02:28,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:28" (1/1) ... [2022-11-03 04:02:28,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:28" (1/1) ... [2022-11-03 04:02:28,246 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:28" (1/1) ... [2022-11-03 04:02:28,248 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:28" (1/1) ... [2022-11-03 04:02:28,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:28" (1/1) ... [2022-11-03 04:02:28,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:02:28,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:02:28,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:02:28,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:02:28,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:28" (1/1) ... [2022-11-03 04:02:28,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:02:28,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:28,292 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:02:28,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:02:28,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:02:28,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:02:28,407 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:02:28,409 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:02:28,641 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:02:28,748 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:02:28,748 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 04:02:28,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:02:28 BoogieIcfgContainer [2022-11-03 04:02:28,751 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:02:28,760 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:02:28,761 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:02:28,765 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:02:28,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:02:27" (1/3) ... [2022-11-03 04:02:28,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15a84309 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:02:28, skipping insertion in model container [2022-11-03 04:02:28,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:28" (2/3) ... [2022-11-03 04:02:28,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15a84309 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:02:28, skipping insertion in model container [2022-11-03 04:02:28,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:02:28" (3/3) ... [2022-11-03 04:02:28,771 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.recount4.c [2022-11-03 04:02:28,793 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:02:28,793 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:02:28,869 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:02:28,886 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@3e372df7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:02:28,891 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:02:28,896 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:28,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 04:02:28,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:28,903 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 04:02:28,905 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:28,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:28,913 INFO L85 PathProgramCache]: Analyzing trace with hash 2244353, now seen corresponding path program 1 times [2022-11-03 04:02:28,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:28,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654514422] [2022-11-03 04:02:28,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:28,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:29,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:29,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:29,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654514422] [2022-11-03 04:02:29,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654514422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:29,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:29,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:02:29,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757995228] [2022-11-03 04:02:29,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:29,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:02:29,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:29,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:02:29,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:02:29,696 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:29,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:29,815 INFO L93 Difference]: Finished difference Result 15 states and 20 transitions. [2022-11-03 04:02:29,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:02:29,820 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-03 04:02:29,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:29,829 INFO L225 Difference]: With dead ends: 15 [2022-11-03 04:02:29,829 INFO L226 Difference]: Without dead ends: 9 [2022-11-03 04:02:29,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:02:29,839 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:29,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 7 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:02:29,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-03 04:02:29,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2022-11-03 04:02:29,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:29,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2022-11-03 04:02:29,881 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 4 [2022-11-03 04:02:29,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:29,882 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2022-11-03 04:02:29,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:29,883 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2022-11-03 04:02:29,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 04:02:29,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:29,884 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-11-03 04:02:29,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 04:02:29,885 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:29,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:29,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1852256404, now seen corresponding path program 1 times [2022-11-03 04:02:29,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:29,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543517484] [2022-11-03 04:02:29,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:29,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:30,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:31,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:31,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543517484] [2022-11-03 04:02:31,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543517484] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:02:31,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112922781] [2022-11-03 04:02:31,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:31,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:31,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:31,407 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:31,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 04:02:31,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:31,625 WARN L261 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-03 04:02:31,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:40,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:40,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:00,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:00,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112922781] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:00,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2106011417] [2022-11-03 04:03:00,525 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-03 04:03:00,526 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:03:00,530 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:03:00,536 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:03:00,536 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:03:01,096 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:03:01,453 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '94#(and (<= |ULTIMATE.start_main_~var_8~0#1| 1) (<= 0 |ULTIMATE.start_main_~var_5~0#1|) (<= 1 |ULTIMATE.start_main_~var_8~0#1|) (<= |ULTIMATE.start_main_~var_13~0#1| 15) (<= 0 |ULTIMATE.start_main_~init_7_arg_1~0#1|) (<= 15 |ULTIMATE.start_main_~var_13~0#1|) (<= 0 |ULTIMATE.start_main_~var_14~0#1|) (<= |ULTIMATE.start_main_~var_14_arg_1~0#1| 15) (<= |ULTIMATE.start_main_~var_5~0#1| 0) (<= 8 |ULTIMATE.start_main_~msb_SORT_4~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 15 |ULTIMATE.start_main_~var_14_arg_1~0#1|) (<= |ULTIMATE.start_main_~bad_15_arg_0~0#1| 1) (<= 0 |ULTIMATE.start_main_~bad_15_arg_0~0#1|) (<= 1 |ULTIMATE.start_main_~mask_SORT_1~0#1|) (<= |ULTIMATE.start_main_~var_14~0#1| 1) (<= 15 |ULTIMATE.start_main_~mask_SORT_4~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= |ULTIMATE.start_main_~msb_SORT_4~0#1| 8) (<= |ULTIMATE.start_main_~mask_SORT_4~0#1| 15) (<= |ULTIMATE.start_main_~init_7_arg_1~0#1| 0) (<= 1 |ULTIMATE.start_main_~msb_SORT_1~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~msb_SORT_1~0#1| 1) (<= |ULTIMATE.start_main_~mask_SORT_1~0#1| 1))' at error location [2022-11-03 04:03:01,454 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:03:01,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:03:01,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 13 [2022-11-03 04:03:01,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878556290] [2022-11-03 04:03:01,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 04:03:01,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 04:03:01,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:03:01,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 04:03:01,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:03:01,458 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:01,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:01,666 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2022-11-03 04:03:01,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:03:01,668 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-03 04:03:01,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:01,668 INFO L225 Difference]: With dead ends: 15 [2022-11-03 04:03:01,675 INFO L226 Difference]: Without dead ends: 13 [2022-11-03 04:03:01,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-11-03 04:03:01,679 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 10 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:01,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 15 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:03:01,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-03 04:03:01,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2022-11-03 04:03:01,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:01,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2022-11-03 04:03:01,684 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2022-11-03 04:03:01,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:01,685 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2022-11-03 04:03:01,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:01,685 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2022-11-03 04:03:01,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 04:03:01,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:01,686 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1] [2022-11-03 04:03:01,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:01,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:01,915 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:01,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:01,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1174987553, now seen corresponding path program 2 times [2022-11-03 04:03:01,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:03:01,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491103498] [2022-11-03 04:03:01,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:01,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:03:02,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 04:03:02,091 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 04:03:02,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 04:03:02,391 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 04:03:02,391 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 04:03:02,393 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 04:03:02,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 04:03:02,399 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1] [2022-11-03 04:03:02,403 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 04:03:02,432 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 04:03:02,432 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 04:03:02,433 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 04:03:02,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 04:03:02 BoogieIcfgContainer [2022-11-03 04:03:02,448 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 04:03:02,449 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 04:03:02,450 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 04:03:02,450 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 04:03:02,451 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:02:28" (3/4) ... [2022-11-03 04:03:02,454 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 04:03:02,454 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 04:03:02,456 INFO L158 Benchmark]: Toolchain (without parser) took 34551.83ms. Allocated memory was 113.2MB in the beginning and 664.8MB in the end (delta: 551.6MB). Free memory was 77.9MB in the beginning and 510.8MB in the end (delta: -432.9MB). Peak memory consumption was 118.5MB. Max. memory is 16.1GB. [2022-11-03 04:03:02,461 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 83.9MB. Free memory was 54.7MB in the beginning and 54.7MB in the end (delta: 25.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 04:03:02,467 INFO L158 Benchmark]: CACSL2BoogieTranslator took 271.90ms. Allocated memory is still 113.2MB. Free memory was 77.7MB in the beginning and 88.5MB in the end (delta: -10.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 04:03:02,469 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.64ms. Allocated memory is still 113.2MB. Free memory was 88.5MB in the beginning and 86.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 04:03:02,469 INFO L158 Benchmark]: Boogie Preprocessor took 34.54ms. Allocated memory is still 113.2MB. Free memory was 86.5MB in the beginning and 85.5MB in the end (delta: 988.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 04:03:02,471 INFO L158 Benchmark]: RCFGBuilder took 499.90ms. Allocated memory is still 113.2MB. Free memory was 85.0MB in the beginning and 69.8MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-03 04:03:02,472 INFO L158 Benchmark]: TraceAbstraction took 33688.70ms. Allocated memory was 113.2MB in the beginning and 664.8MB in the end (delta: 551.6MB). Free memory was 69.2MB in the beginning and 511.9MB in the end (delta: -442.6MB). Peak memory consumption was 111.0MB. Max. memory is 16.1GB. [2022-11-03 04:03:02,472 INFO L158 Benchmark]: Witness Printer took 5.13ms. Allocated memory is still 664.8MB. Free memory was 511.9MB in the beginning and 510.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 04:03:02,475 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 83.9MB. Free memory was 54.7MB in the beginning and 54.7MB in the end (delta: 25.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 271.90ms. Allocated memory is still 113.2MB. Free memory was 77.7MB in the beginning and 88.5MB in the end (delta: -10.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.64ms. Allocated memory is still 113.2MB. Free memory was 88.5MB in the beginning and 86.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.54ms. Allocated memory is still 113.2MB. Free memory was 86.5MB in the beginning and 85.5MB in the end (delta: 988.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 499.90ms. Allocated memory is still 113.2MB. Free memory was 85.0MB in the beginning and 69.8MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 33688.70ms. Allocated memory was 113.2MB in the beginning and 664.8MB in the end (delta: 551.6MB). Free memory was 69.2MB in the beginning and 511.9MB in the end (delta: -442.6MB). Peak memory consumption was 111.0MB. Max. memory is 16.1GB. * Witness Printer took 5.13ms. Allocated memory is still 664.8MB. Free memory was 511.9MB in the beginning and 510.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 21]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseAnd at line 46. Possible FailurePath: [L26] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L27] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L29] const SORT_4 mask_SORT_4 = (SORT_4)-1 >> (sizeof(SORT_4) * 8 - 4); [L30] const SORT_4 msb_SORT_4 = (SORT_4)1 << (4 - 1); [L32] const SORT_4 var_5 = 0; [L33] const SORT_4 var_8 = 1; [L34] const SORT_4 var_13 = mask_SORT_4; [L36] SORT_1 input_2; [L37] SORT_1 input_3; [L39] SORT_4 state_6 = __VERIFIER_nondet_uchar() & mask_SORT_4; [L41] SORT_4 init_7_arg_1 = var_5; [L42] state_6 = init_7_arg_1 VAL [init_7_arg_1=0, mask_SORT_1=1, mask_SORT_4=15, msb_SORT_1=1, msb_SORT_4=8, state_6=0, var_13=15, var_5=0, var_8=1] [L45] input_2 = __VERIFIER_nondet_uchar() [L46] input_2 = input_2 & mask_SORT_1 [L47] input_3 = __VERIFIER_nondet_uchar() [L48] input_3 = input_3 & mask_SORT_1 [L51] SORT_4 var_14_arg_0 = state_6; [L52] SORT_4 var_14_arg_1 = var_13; [L53] SORT_1 var_14 = var_14_arg_0 == var_14_arg_1; [L54] SORT_1 bad_15_arg_0 = var_14; [L55] CALL __VERIFIER_assert(!(bad_15_arg_0)) [L21] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L55] RET __VERIFIER_assert(!(bad_15_arg_0)) [L57] SORT_4 var_9_arg_0 = state_6; [L58] SORT_4 var_9_arg_1 = var_8; [L59] SORT_4 var_9 = var_9_arg_0 + var_9_arg_1; [L60] SORT_1 var_10_arg_0 = input_2; [L61] SORT_4 var_10_arg_1 = var_9; [L62] SORT_4 var_10_arg_2 = state_6; [L63] EXPR var_10_arg_0 ? var_10_arg_1 : var_10_arg_2 [L63] SORT_4 var_10 = var_10_arg_0 ? var_10_arg_1 : var_10_arg_2; [L64] SORT_1 var_11_arg_0 = input_3; [L65] SORT_4 var_11_arg_1 = var_5; [L66] SORT_4 var_11_arg_2 = var_10; [L67] EXPR var_11_arg_0 ? var_11_arg_1 : var_11_arg_2 [L67] SORT_4 var_11 = var_11_arg_0 ? var_11_arg_1 : var_11_arg_2; [L68] var_11 = var_11 & mask_SORT_4 [L69] SORT_4 next_12_arg_1 = var_11; [L71] state_6 = next_12_arg_1 VAL [bad_15_arg_0=0, init_7_arg_1=0, input_2=1, input_3=0, mask_SORT_1=1, mask_SORT_4=15, msb_SORT_1=1, msb_SORT_4=8, next_12_arg_1=1, state_6=1, var_10=1, var_10_arg_0=1, var_10_arg_1=1, var_10_arg_2=0, var_11=1, var_11_arg_0=0, var_11_arg_1=0, var_11_arg_2=1, var_13=15, var_14=0, var_14_arg_0=0, var_14_arg_1=15, var_5=0, var_8=1, var_9=1, var_9_arg_0=0, var_9_arg_1=1] [L45] input_2 = __VERIFIER_nondet_uchar() [L46] input_2 = input_2 & mask_SORT_1 [L47] input_3 = __VERIFIER_nondet_uchar() [L48] input_3 = input_3 & mask_SORT_1 [L51] SORT_4 var_14_arg_0 = state_6; [L52] SORT_4 var_14_arg_1 = var_13; [L53] SORT_1 var_14 = var_14_arg_0 == var_14_arg_1; [L54] SORT_1 bad_15_arg_0 = var_14; [L55] CALL __VERIFIER_assert(!(bad_15_arg_0)) [L21] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L55] RET __VERIFIER_assert(!(bad_15_arg_0)) [L57] SORT_4 var_9_arg_0 = state_6; [L58] SORT_4 var_9_arg_1 = var_8; [L59] SORT_4 var_9 = var_9_arg_0 + var_9_arg_1; [L60] SORT_1 var_10_arg_0 = input_2; [L61] SORT_4 var_10_arg_1 = var_9; [L62] SORT_4 var_10_arg_2 = state_6; [L63] EXPR var_10_arg_0 ? var_10_arg_1 : var_10_arg_2 [L63] SORT_4 var_10 = var_10_arg_0 ? var_10_arg_1 : var_10_arg_2; [L64] SORT_1 var_11_arg_0 = input_3; [L65] SORT_4 var_11_arg_1 = var_5; [L66] SORT_4 var_11_arg_2 = var_10; [L67] EXPR var_11_arg_0 ? var_11_arg_1 : var_11_arg_2 [L67] SORT_4 var_11 = var_11_arg_0 ? var_11_arg_1 : var_11_arg_2; [L68] var_11 = var_11 & mask_SORT_4 [L69] SORT_4 next_12_arg_1 = var_11; [L71] state_6 = next_12_arg_1 VAL [bad_15_arg_0=0, init_7_arg_1=0, input_2=1, input_3=0, mask_SORT_1=1, mask_SORT_4=15, msb_SORT_1=1, msb_SORT_4=8, next_12_arg_1=15, state_6=15, var_10=2, var_10_arg_0=1, var_10_arg_1=2, var_10_arg_2=1, var_11=15, var_11_arg_0=0, var_11_arg_1=0, var_11_arg_2=2, var_13=15, var_14=0, var_14_arg_0=1, var_14_arg_1=15, var_5=0, var_8=1, var_9=2, var_9_arg_0=1, var_9_arg_1=1] [L45] input_2 = __VERIFIER_nondet_uchar() [L46] input_2 = input_2 & mask_SORT_1 [L47] input_3 = __VERIFIER_nondet_uchar() [L48] input_3 = input_3 & mask_SORT_1 [L51] SORT_4 var_14_arg_0 = state_6; [L52] SORT_4 var_14_arg_1 = var_13; [L53] SORT_1 var_14 = var_14_arg_0 == var_14_arg_1; [L54] SORT_1 bad_15_arg_0 = var_14; [L55] CALL __VERIFIER_assert(!(bad_15_arg_0)) [L21] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L21] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 33.5s, OverallIterations: 3, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 14 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 14 mSDsluCounter, 22 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 20 mSDsCounter, 14 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 36 IncrementalHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 14 mSolverCounterUnsat, 5 mSDtfsCounter, 36 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=2, InterpolantAutomatonStates: 13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 30.7s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 1155 SizeOfPredicates, 32 NumberOfNonLiveVariables, 82 ConjunctsInSsa, 64 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 04:03:02,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 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_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.recount4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 6270eb1b6253e856606c006aad6f25958ddccc57a27345214c2cf80ca93686b2 --- 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-5e519f3 [2022-11-03 04:03:05,061 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:03:05,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:03:05,093 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:03:05,094 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:03:05,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:03:05,096 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:03:05,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:03:05,100 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:03:05,102 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:03:05,103 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:03:05,104 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:03:05,105 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:03:05,106 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:03:05,107 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:03:05,109 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:03:05,110 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:03:05,111 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:03:05,113 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:03:05,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:03:05,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:03:05,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:03:05,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:03:05,121 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:03:05,125 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:03:05,125 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:03:05,126 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:03:05,127 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:03:05,128 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:03:05,129 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:03:05,129 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:03:05,130 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:03:05,131 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:03:05,132 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:03:05,134 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:03:05,134 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:03:05,135 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:03:05,135 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:03:05,136 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:03:05,137 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:03:05,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:03:05,139 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 04:03:05,183 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:03:05,183 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:03:05,184 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:03:05,184 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:03:05,185 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:03:05,185 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:03:05,185 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:03:05,186 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:03:05,186 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:03:05,186 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:03:05,186 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:03:05,187 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:03:05,187 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:03:05,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:03:05,188 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:03:05,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:03:05,188 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:03:05,189 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 04:03:05,189 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 04:03:05,189 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 04:03:05,189 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:03:05,190 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:03:05,190 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:03:05,190 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:03:05,190 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 04:03:05,191 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:03:05,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:03:05,191 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:03:05,191 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:03:05,191 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:03:05,192 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 04:03:05,192 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:05,192 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:03:05,192 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:03:05,193 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 04:03:05,193 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6270eb1b6253e856606c006aad6f25958ddccc57a27345214c2cf80ca93686b2 [2022-11-03 04:03:05,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:03:05,596 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:03:05,599 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:03:05,600 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:03:05,601 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:03:05,604 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.recount4.c [2022-11-03 04:03:05,687 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/data/8cd291c0f/780adabc56194d4b82fd0748fde91ae2/FLAGc3b8f275d [2022-11-03 04:03:06,191 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:03:06,192 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.recount4.c [2022-11-03 04:03:06,200 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/data/8cd291c0f/780adabc56194d4b82fd0748fde91ae2/FLAGc3b8f275d [2022-11-03 04:03:06,538 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/data/8cd291c0f/780adabc56194d4b82fd0748fde91ae2 [2022-11-03 04:03:06,540 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:03:06,542 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:03:06,544 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:03:06,544 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:03:06,548 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:03:06,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:03:06" (1/1) ... [2022-11-03 04:03:06,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7eb7a94b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:06, skipping insertion in model container [2022-11-03 04:03:06,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:03:06" (1/1) ... [2022-11-03 04:03:06,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:03:06,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:03:06,759 WARN L230 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_770e0710-4c50-4b04-ac88-21d124b5a8d9/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.recount4.c[1117,1130] [2022-11-03 04:03:06,827 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:03:06,835 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:03:06,869 WARN L230 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_770e0710-4c50-4b04-ac88-21d124b5a8d9/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.recount4.c[1117,1130] [2022-11-03 04:03:06,914 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:03:06,927 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:03:06,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:06 WrapperNode [2022-11-03 04:03:06,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:03:06,929 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:03:06,929 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:03:06,930 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:03:06,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:06" (1/1) ... [2022-11-03 04:03:06,944 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:06" (1/1) ... [2022-11-03 04:03:06,969 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-11-03 04:03:06,969 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:03:06,970 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:03:06,970 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:03:06,971 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:03:06,979 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:06" (1/1) ... [2022-11-03 04:03:06,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:06" (1/1) ... [2022-11-03 04:03:06,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:06" (1/1) ... [2022-11-03 04:03:06,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:06" (1/1) ... [2022-11-03 04:03:07,001 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:06" (1/1) ... [2022-11-03 04:03:07,011 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:06" (1/1) ... [2022-11-03 04:03:07,012 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:06" (1/1) ... [2022-11-03 04:03:07,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:06" (1/1) ... [2022-11-03 04:03:07,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:03:07,025 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:03:07,025 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:03:07,025 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:03:07,026 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:06" (1/1) ... [2022-11-03 04:03:07,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:03:07,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:03:07,064 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:03:07,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:03:07,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:03:07,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:03:07,202 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:03:07,204 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:03:07,392 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:03:07,399 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:03:07,399 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 04:03:07,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:03:07 BoogieIcfgContainer [2022-11-03 04:03:07,402 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:03:07,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:03:07,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:03:07,408 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:03:07,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:03:06" (1/3) ... [2022-11-03 04:03:07,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28294c20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:03:07, skipping insertion in model container [2022-11-03 04:03:07,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:03:06" (2/3) ... [2022-11-03 04:03:07,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28294c20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:03:07, skipping insertion in model container [2022-11-03 04:03:07,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:03:07" (3/3) ... [2022-11-03 04:03:07,415 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.recount4.c [2022-11-03 04:03:07,436 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:03:07,437 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:03:07,515 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:03:07,532 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@7fec9755, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:03:07,534 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:03:07,538 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:07,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 04:03:07,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:07,545 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 04:03:07,546 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:07,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:07,554 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 04:03:07,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:07,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1110535831] [2022-11-03 04:03:07,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:07,570 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:07,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:07,575 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:07,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 04:03:07,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:07,650 WARN L261 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:03:07,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:07,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:07,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:03:07,833 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:07,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1110535831] [2022-11-03 04:03:07,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1110535831] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:03:07,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:03:07,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:03:07,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020196903] [2022-11-03 04:03:07,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:03:07,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:03:07,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:07,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:03:07,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:03:07,903 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:07,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:07,991 INFO L93 Difference]: Finished difference Result 32 states and 48 transitions. [2022-11-03 04:03:07,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:03:07,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-03 04:03:07,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:08,002 INFO L225 Difference]: With dead ends: 32 [2022-11-03 04:03:08,002 INFO L226 Difference]: Without dead ends: 19 [2022-11-03 04:03:08,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:03:08,008 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:08,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 30 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:03:08,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-03 04:03:08,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 13. [2022-11-03 04:03:08,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:08,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-11-03 04:03:08,041 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 5 [2022-11-03 04:03:08,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:08,042 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-11-03 04:03:08,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:08,042 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-11-03 04:03:08,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 04:03:08,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:08,047 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:03:08,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:08,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:03:08,248 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:08,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:08,249 INFO L85 PathProgramCache]: Analyzing trace with hash 505863741, now seen corresponding path program 1 times [2022-11-03 04:03:08,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:08,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [989674151] [2022-11-03 04:03:08,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:08,250 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:08,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:08,252 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:08,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 04:03:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:08,326 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 04:03:08,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:08,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:08,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:08,999 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:09,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [989674151] [2022-11-03 04:03:09,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [989674151] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:09,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1669688135] [2022-11-03 04:03:09,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:09,006 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:09,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:03:09,015 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:03:09,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2022-11-03 04:03:09,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:09,141 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 04:03:09,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:09,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:09,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:09,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:09,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1669688135] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:09,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106823602] [2022-11-03 04:03:09,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:09,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:09,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:03:09,439 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:03:09,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 04:03:09,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:09,510 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 04:03:09,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:09,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:09,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:09,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:09,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106823602] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:09,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:03:09,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 10, 10] total 18 [2022-11-03 04:03:09,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648051111] [2022-11-03 04:03:09,838 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:03:09,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 04:03:09,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:09,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 04:03:09,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:03:09,841 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:11,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:11,273 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2022-11-03 04:03:11,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-03 04:03:11,274 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-03 04:03:11,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:11,275 INFO L225 Difference]: With dead ends: 67 [2022-11-03 04:03:11,275 INFO L226 Difference]: Without dead ends: 65 [2022-11-03 04:03:11,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=469, Invalid=1787, Unknown=0, NotChecked=0, Total=2256 [2022-11-03 04:03:11,279 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 176 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:11,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 110 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:03:11,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-03 04:03:11,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 27. [2022-11-03 04:03:11,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:11,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-11-03 04:03:11,296 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 12 [2022-11-03 04:03:11,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:11,296 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-11-03 04:03:11,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:11,297 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-11-03 04:03:11,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 04:03:11,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:11,298 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:03:11,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:11,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-03 04:03:11,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:11,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:03:11,900 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:11,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:11,901 INFO L85 PathProgramCache]: Analyzing trace with hash 504016699, now seen corresponding path program 1 times [2022-11-03 04:03:11,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:11,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151030509] [2022-11-03 04:03:11,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:11,902 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:11,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:11,903 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:11,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 04:03:11,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:11,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 04:03:11,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:12,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:12,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:12,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:12,174 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:12,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1151030509] [2022-11-03 04:03:12,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1151030509] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:12,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [290958722] [2022-11-03 04:03:12,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:12,175 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:12,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:03:12,177 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:03:12,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-03 04:03:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:12,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 04:03:12,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:12,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:12,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:12,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:12,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [290958722] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:12,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645305524] [2022-11-03 04:03:12,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:12,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:12,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:03:12,420 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:03:12,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 04:03:12,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:12,467 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 04:03:12,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:12,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:12,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:13,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645305524] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:13,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:03:13,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 7, 9, 9] total 23 [2022-11-03 04:03:13,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175922668] [2022-11-03 04:03:13,105 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:03:13,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 04:03:13,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:13,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 04:03:13,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-11-03 04:03:13,107 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:13,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:13,328 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2022-11-03 04:03:13,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 04:03:13,329 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-03 04:03:13,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:13,331 INFO L225 Difference]: With dead ends: 34 [2022-11-03 04:03:13,331 INFO L226 Difference]: Without dead ends: 32 [2022-11-03 04:03:13,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-11-03 04:03:13,333 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 8 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:13,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 79 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 16 Unchecked, 0.0s Time] [2022-11-03 04:03:13,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-03 04:03:13,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2022-11-03 04:03:13,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:13,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-11-03 04:03:13,343 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 12 [2022-11-03 04:03:13,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:13,344 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-11-03 04:03:13,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:13,344 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-11-03 04:03:13,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 04:03:13,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:13,345 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:03:13,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:13,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:13,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:13,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:03:13,960 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:13,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:13,961 INFO L85 PathProgramCache]: Analyzing trace with hash -2014096193, now seen corresponding path program 1 times [2022-11-03 04:03:13,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:13,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [878479478] [2022-11-03 04:03:13,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:13,961 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:13,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:13,963 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:14,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 04:03:14,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 04:03:14,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:14,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:14,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:14,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:14,303 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:14,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [878479478] [2022-11-03 04:03:14,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [878479478] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:14,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [76862573] [2022-11-03 04:03:14,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:14,304 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:14,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:03:14,306 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:03:14,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-03 04:03:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:14,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 04:03:14,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:14,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:14,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:14,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [76862573] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:14,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133765498] [2022-11-03 04:03:14,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:14,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:14,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:03:14,520 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:03:14,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 04:03:14,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:14,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 04:03:14,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:14,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:14,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:14,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:14,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133765498] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:14,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:03:14,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 10, 10] total 18 [2022-11-03 04:03:14,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411069832] [2022-11-03 04:03:14,786 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:03:14,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 04:03:14,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:14,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 04:03:14,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:03:14,788 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:15,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:15,385 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2022-11-03 04:03:15,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 04:03:15,385 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-03 04:03:15,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:15,386 INFO L225 Difference]: With dead ends: 60 [2022-11-03 04:03:15,386 INFO L226 Difference]: Without dead ends: 58 [2022-11-03 04:03:15,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2022-11-03 04:03:15,388 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 62 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:15,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 136 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:03:15,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-03 04:03:15,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 36. [2022-11-03 04:03:15,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:15,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-11-03 04:03:15,397 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 12 [2022-11-03 04:03:15,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:15,398 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-11-03 04:03:15,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:15,398 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-11-03 04:03:15,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 04:03:15,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:15,399 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 04:03:15,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2022-11-03 04:03:15,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:15,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:16,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:16,002 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:16,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:16,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1377851641, now seen corresponding path program 1 times [2022-11-03 04:03:16,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:16,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1594968735] [2022-11-03 04:03:16,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:16,004 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:16,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:16,005 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:16,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 04:03:16,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:16,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 04:03:16,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:16,233 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 04:03:16,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:16,354 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 04:03:16,354 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:16,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1594968735] [2022-11-03 04:03:16,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1594968735] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:16,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1232204278] [2022-11-03 04:03:16,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:16,355 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:16,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:03:16,356 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:03:16,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-03 04:03:16,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:16,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 04:03:16,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:16,618 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 04:03:16,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:16,680 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 04:03:16,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1232204278] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:16,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955590988] [2022-11-03 04:03:16,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:16,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:16,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:03:16,682 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:03:16,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 04:03:16,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:16,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 04:03:16,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:17,180 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:03:17,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:17,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:03:17,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955590988] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:17,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:03:17,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 7, 11, 11] total 25 [2022-11-03 04:03:17,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032420675] [2022-11-03 04:03:17,425 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:03:17,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 04:03:17,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:17,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 04:03:17,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-11-03 04:03:17,434 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:18,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:18,144 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2022-11-03 04:03:18,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 04:03:18,146 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-03 04:03:18,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:18,146 INFO L225 Difference]: With dead ends: 90 [2022-11-03 04:03:18,146 INFO L226 Difference]: Without dead ends: 88 [2022-11-03 04:03:18,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=339, Invalid=1221, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 04:03:18,148 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 97 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:18,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 165 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 164 Invalid, 0 Unknown, 119 Unchecked, 0.2s Time] [2022-11-03 04:03:18,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-03 04:03:18,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 46. [2022-11-03 04:03:18,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 45 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:18,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2022-11-03 04:03:18,168 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 19 [2022-11-03 04:03:18,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:18,168 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2022-11-03 04:03:18,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:18,169 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2022-11-03 04:03:18,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 04:03:18,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:18,170 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 04:03:18,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:18,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:18,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:18,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:18,788 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:18,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:18,789 INFO L85 PathProgramCache]: Analyzing trace with hash 399002763, now seen corresponding path program 1 times [2022-11-03 04:03:18,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:18,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2047727965] [2022-11-03 04:03:18,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:18,789 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:18,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:18,791 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:18,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 04:03:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:18,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 04:03:18,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:19,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:03:19,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:19,410 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:03:19,411 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:19,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2047727965] [2022-11-03 04:03:19,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2047727965] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:19,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1630739206] [2022-11-03 04:03:19,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:19,411 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:19,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:03:19,413 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:03:19,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-03 04:03:19,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:19,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 04:03:19,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:19,652 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:03:19,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:19,753 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:03:19,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1630739206] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:19,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474960152] [2022-11-03 04:03:19,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:19,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:19,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:03:19,755 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:03:19,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 04:03:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:19,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 04:03:19,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:20,002 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:03:20,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:20,136 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:03:20,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474960152] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:20,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:03:20,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 12, 12] total 22 [2022-11-03 04:03:20,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116980538] [2022-11-03 04:03:20,137 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:03:20,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 04:03:20,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:20,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 04:03:20,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-11-03 04:03:20,139 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:22,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:22,428 INFO L93 Difference]: Finished difference Result 121 states and 146 transitions. [2022-11-03 04:03:22,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-03 04:03:22,435 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-03 04:03:22,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:22,436 INFO L225 Difference]: With dead ends: 121 [2022-11-03 04:03:22,436 INFO L226 Difference]: Without dead ends: 119 [2022-11-03 04:03:22,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 82 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=829, Invalid=3203, Unknown=0, NotChecked=0, Total=4032 [2022-11-03 04:03:22,439 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 191 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:22,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 175 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 04:03:22,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-03 04:03:22,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 51. [2022-11-03 04:03:22,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.28) internal successors, (64), 50 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:22,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2022-11-03 04:03:22,451 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 19 [2022-11-03 04:03:22,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:22,451 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2022-11-03 04:03:22,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:22,452 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2022-11-03 04:03:22,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 04:03:22,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:22,453 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 04:03:22,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:22,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:22,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:23,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:23,059 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:23,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:23,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1634170037, now seen corresponding path program 2 times [2022-11-03 04:03:23,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:23,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432773606] [2022-11-03 04:03:23,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:03:23,060 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:23,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:23,062 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:23,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 04:03:23,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:03:23,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:03:23,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 04:03:23,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:23,401 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:23,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:23,766 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:23,767 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:23,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432773606] [2022-11-03 04:03:23,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [432773606] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:23,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [387854802] [2022-11-03 04:03:23,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:03:23,768 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:23,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:03:23,771 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:03:23,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-03 04:03:23,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:03:23,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:03:23,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 04:03:23,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:24,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:24,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:24,122 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:24,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [387854802] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:24,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269510242] [2022-11-03 04:03:24,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:03:24,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:24,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:03:24,125 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:03:24,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 04:03:24,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:03:24,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:03:24,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 04:03:24,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:24,337 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:24,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:24,405 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:24,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269510242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:24,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:03:24,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13, 12, 12, 12] total 23 [2022-11-03 04:03:24,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041274542] [2022-11-03 04:03:24,406 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:03:24,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 04:03:24,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:24,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 04:03:24,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2022-11-03 04:03:24,407 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:26,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:26,289 INFO L93 Difference]: Finished difference Result 200 states and 249 transitions. [2022-11-03 04:03:26,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-03 04:03:26,290 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-03 04:03:26,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:26,291 INFO L225 Difference]: With dead ends: 200 [2022-11-03 04:03:26,291 INFO L226 Difference]: Without dead ends: 198 [2022-11-03 04:03:26,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=889, Invalid=2771, Unknown=0, NotChecked=0, Total=3660 [2022-11-03 04:03:26,294 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 190 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:26,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 93 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:03:26,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-03 04:03:26,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 46. [2022-11-03 04:03:26,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 45 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:26,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2022-11-03 04:03:26,309 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 19 [2022-11-03 04:03:26,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:26,309 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2022-11-03 04:03:26,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:26,309 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2022-11-03 04:03:26,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 04:03:26,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:26,310 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:03:26,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:26,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:26,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:26,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:03:26,913 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:26,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:26,914 INFO L85 PathProgramCache]: Analyzing trace with hash 140837325, now seen corresponding path program 1 times [2022-11-03 04:03:26,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:26,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [483079610] [2022-11-03 04:03:26,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:26,915 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:26,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:26,915 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:26,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 04:03:26,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:26,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 04:03:26,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:27,165 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:03:27,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:03:27,425 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:27,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [483079610] [2022-11-03 04:03:27,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [483079610] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:27,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [487964858] [2022-11-03 04:03:27,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:27,426 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:27,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:03:27,427 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:03:27,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-03 04:03:27,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:27,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 04:03:27,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:27,628 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:03:27,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:27,687 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:03:27,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [487964858] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:27,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935163937] [2022-11-03 04:03:27,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:03:27,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:27,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:03:27,689 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:03:27,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-03 04:03:27,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:03:27,737 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 04:03:27,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:03:28,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:28,384 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:28,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935163937] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:28,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:03:28,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12, 11, 14, 11] total 34 [2022-11-03 04:03:28,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631573973] [2022-11-03 04:03:28,385 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:03:28,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 04:03:28,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:28,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 04:03:28,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 04:03:28,387 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:29,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:29,136 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2022-11-03 04:03:29,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 04:03:29,137 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-03 04:03:29,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:29,138 INFO L225 Difference]: With dead ends: 90 [2022-11-03 04:03:29,138 INFO L226 Difference]: Without dead ends: 88 [2022-11-03 04:03:29,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=324, Invalid=2226, Unknown=0, NotChecked=0, Total=2550 [2022-11-03 04:03:29,140 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 29 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:29,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 83 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 154 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-11-03 04:03:29,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-03 04:03:29,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 39. [2022-11-03 04:03:29,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:29,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2022-11-03 04:03:29,154 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 19 [2022-11-03 04:03:29,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:29,155 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2022-11-03 04:03:29,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:29,155 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2022-11-03 04:03:29,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 04:03:29,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:29,156 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 04:03:29,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:29,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2022-11-03 04:03:29,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-11-03 04:03:29,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:29,759 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:29,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:29,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1907845447, now seen corresponding path program 2 times [2022-11-03 04:03:29,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:29,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232993887] [2022-11-03 04:03:29,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:03:29,760 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:29,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:29,762 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:29,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 04:03:29,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:03:29,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:03:29,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 04:03:29,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:30,086 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:03:30,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:30,495 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:30,495 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:30,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232993887] [2022-11-03 04:03:30,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232993887] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:30,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1541727637] [2022-11-03 04:03:30,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:03:30,496 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:30,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:03:30,497 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:03:30,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-03 04:03:30,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:03:30,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:03:30,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 04:03:30,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:03:30,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:30,761 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:30,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1541727637] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:30,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088284974] [2022-11-03 04:03:30,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:03:30,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:30,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:03:30,763 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:03:30,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-03 04:03:30,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:03:30,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:03:30,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 04:03:30,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:30,945 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:03:30,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:31,004 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:31,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088284974] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:31,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:03:31,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13, 14, 13, 14] total 25 [2022-11-03 04:03:31,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177493282] [2022-11-03 04:03:31,005 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:03:31,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 04:03:31,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:31,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 04:03:31,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2022-11-03 04:03:31,006 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:34,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:34,749 INFO L93 Difference]: Finished difference Result 140 states and 171 transitions. [2022-11-03 04:03:34,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-03 04:03:34,752 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-03 04:03:34,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:34,753 INFO L225 Difference]: With dead ends: 140 [2022-11-03 04:03:34,753 INFO L226 Difference]: Without dead ends: 138 [2022-11-03 04:03:34,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=905, Invalid=4065, Unknown=0, NotChecked=0, Total=4970 [2022-11-03 04:03:34,755 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 235 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:34,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 171 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 04:03:34,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-03 04:03:34,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 42. [2022-11-03 04:03:34,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:34,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2022-11-03 04:03:34,772 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 19 [2022-11-03 04:03:34,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:34,772 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2022-11-03 04:03:34,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:34,773 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2022-11-03 04:03:34,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 04:03:34,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:34,774 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2022-11-03 04:03:34,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:34,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2022-11-03 04:03:35,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-11-03 04:03:35,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:35,379 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:35,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:35,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1902297277, now seen corresponding path program 2 times [2022-11-03 04:03:35,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:35,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129104008] [2022-11-03 04:03:35,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:03:35,380 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:35,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:35,381 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:35,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 04:03:35,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:03:35,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:03:35,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-03 04:03:35,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:36,083 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:36,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:37,215 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:37,215 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:37,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2129104008] [2022-11-03 04:03:37,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2129104008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:37,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1716808030] [2022-11-03 04:03:37,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:03:37,216 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:37,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:03:37,217 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:03:37,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-03 04:03:37,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:03:37,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:03:37,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-03 04:03:37,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:37,556 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:37,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:37,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1716808030] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:37,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864520212] [2022-11-03 04:03:37,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:03:37,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:37,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:03:37,663 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:03:37,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-03 04:03:37,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:03:37,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:03:37,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-03 04:03:37,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:37,989 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:37,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:38,109 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:38,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864520212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:38,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:03:38,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19, 19, 19, 19] total 36 [2022-11-03 04:03:38,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808497120] [2022-11-03 04:03:38,111 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:03:38,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 04:03:38,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:38,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 04:03:38,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 04:03:38,113 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 36 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 36 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:46,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:46,397 INFO L93 Difference]: Finished difference Result 202 states and 242 transitions. [2022-11-03 04:03:46,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-03 04:03:46,398 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 36 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-03 04:03:46,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:46,399 INFO L225 Difference]: With dead ends: 202 [2022-11-03 04:03:46,399 INFO L226 Difference]: Without dead ends: 200 [2022-11-03 04:03:46,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3412 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=2139, Invalid=10517, Unknown=0, NotChecked=0, Total=12656 [2022-11-03 04:03:46,403 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 455 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:46,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 332 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 04:03:46,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-11-03 04:03:46,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 69. [2022-11-03 04:03:46,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 68 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:46,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2022-11-03 04:03:46,428 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 26 [2022-11-03 04:03:46,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:46,428 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2022-11-03 04:03:46,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 36 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:46,428 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2022-11-03 04:03:46,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 04:03:46,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:46,429 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 04:03:46,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-11-03 04:03:46,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-03 04:03:46,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-11-03 04:03:47,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:03:47,035 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:47,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:47,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1714843527, now seen corresponding path program 2 times [2022-11-03 04:03:47,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:47,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [98152866] [2022-11-03 04:03:47,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:03:47,036 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:47,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:47,037 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:47,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 04:03:47,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:03:47,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:03:47,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 04:03:47,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:47,475 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 04:03:47,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:48,143 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:03:48,143 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:48,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [98152866] [2022-11-03 04:03:48,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [98152866] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:48,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2145164254] [2022-11-03 04:03:48,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:03:48,144 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:48,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:03:48,145 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:03:48,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-03 04:03:48,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:03:48,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:03:48,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 04:03:48,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:48,467 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 04:03:48,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:48,609 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:03:48,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2145164254] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:48,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716493678] [2022-11-03 04:03:48,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:03:48,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:48,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:03:48,611 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:03:48,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-03 04:03:48,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:03:48,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:03:48,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 04:03:48,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:48,885 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 04:03:48,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:49,029 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:03:49,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716493678] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:49,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:03:49,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16, 16, 15, 16] total 30 [2022-11-03 04:03:49,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646307117] [2022-11-03 04:03:49,030 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:03:49,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-03 04:03:49,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:49,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-03 04:03:49,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2022-11-03 04:03:49,034 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:53,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:03:53,846 INFO L93 Difference]: Finished difference Result 182 states and 225 transitions. [2022-11-03 04:03:53,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-03 04:03:53,846 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-03 04:03:53,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:03:53,847 INFO L225 Difference]: With dead ends: 182 [2022-11-03 04:03:53,848 INFO L226 Difference]: Without dead ends: 180 [2022-11-03 04:03:53,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 119 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1935 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1593, Invalid=5889, Unknown=0, NotChecked=0, Total=7482 [2022-11-03 04:03:53,850 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 285 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:03:53,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 71 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 04:03:53,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-03 04:03:53,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 69. [2022-11-03 04:03:53,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 68 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:53,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2022-11-03 04:03:53,875 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 26 [2022-11-03 04:03:53,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:03:53,875 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2022-11-03 04:03:53,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:53,876 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2022-11-03 04:03:53,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-03 04:03:53,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:03:53,877 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1] [2022-11-03 04:03:53,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-11-03 04:03:54,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2022-11-03 04:03:54,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-11-03 04:03:54,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:54,482 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:03:54,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:03:54,482 INFO L85 PathProgramCache]: Analyzing trace with hash -800082233, now seen corresponding path program 3 times [2022-11-03 04:03:54,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:03:54,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1313071511] [2022-11-03 04:03:54,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:03:54,483 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:03:54,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:03:54,484 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:03:54,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 04:03:54,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 04:03:54,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:03:54,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 04:03:54,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:55,328 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:03:55,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:56,786 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:03:56,787 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:03:56,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1313071511] [2022-11-03 04:03:56,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1313071511] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:56,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [877156538] [2022-11-03 04:03:56,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:03:56,787 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:03:56,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:03:56,788 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:03:56,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-03 04:03:56,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 04:03:56,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:03:56,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-03 04:03:56,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:57,185 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:03:57,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:57,371 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:03:57,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [877156538] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:57,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136954055] [2022-11-03 04:03:57,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:03:57,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:57,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:03:57,379 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:03:57,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-03 04:03:57,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 04:03:57,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:03:57,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 04:03:57,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:03:57,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:57,910 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:03:57,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136954055] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:57,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:03:57,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 20, 21, 20, 21] total 39 [2022-11-03 04:03:57,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026387276] [2022-11-03 04:03:57,911 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:03:57,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-03 04:03:57,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:57,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-03 04:03:57,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1361, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 04:03:57,912 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand has 39 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 39 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:14,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:14,119 INFO L93 Difference]: Finished difference Result 262 states and 319 transitions. [2022-11-03 04:04:14,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-11-03 04:04:14,120 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 39 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-03 04:04:14,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:14,122 INFO L225 Difference]: With dead ends: 262 [2022-11-03 04:04:14,122 INFO L226 Difference]: Without dead ends: 260 [2022-11-03 04:04:14,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 149 SyntacticMatches, 6 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7104 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=3781, Invalid=19475, Unknown=0, NotChecked=0, Total=23256 [2022-11-03 04:04:14,128 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 354 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:14,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 372 Invalid, 1469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 04:04:14,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-11-03 04:04:14,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 62. [2022-11-03 04:04:14,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.278688524590164) internal successors, (78), 61 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:14,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2022-11-03 04:04:14,160 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 33 [2022-11-03 04:04:14,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:14,161 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2022-11-03 04:04:14,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 39 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:14,161 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2022-11-03 04:04:14,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-03 04:04:14,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:14,162 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1] [2022-11-03 04:04:14,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2022-11-03 04:04:14,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-11-03 04:04:14,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-11-03 04:04:14,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:04:14,765 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:14,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:14,766 INFO L85 PathProgramCache]: Analyzing trace with hash 633736843, now seen corresponding path program 4 times [2022-11-03 04:04:14,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:14,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612188349] [2022-11-03 04:04:14,766 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 04:04:14,766 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:14,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:14,767 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:14,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 04:04:14,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 04:04:14,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:04:14,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 04:04:14,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:15,514 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:04:15,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:17,013 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:04:17,013 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:17,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612188349] [2022-11-03 04:04:17,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1612188349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:17,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1431064259] [2022-11-03 04:04:17,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 04:04:17,014 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:17,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:04:17,015 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:04:17,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-03 04:04:17,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 04:04:17,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:04:17,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-03 04:04:17,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:04:17,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:17,647 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:04:17,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1431064259] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:17,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691740276] [2022-11-03 04:04:17,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 04:04:17,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:04:17,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:04:17,648 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:04:17,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-03 04:04:17,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 04:04:17,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:04:17,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-03 04:04:17,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:04:18,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:18,435 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:04:18,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691740276] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:18,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:04:18,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 20, 21, 21, 22] total 41 [2022-11-03 04:04:18,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165933364] [2022-11-03 04:04:18,436 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:04:18,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-03 04:04:18,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:18,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-03 04:04:18,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1504, Unknown=0, NotChecked=0, Total=1640 [2022-11-03 04:04:18,438 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand has 41 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 41 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:40,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:40,150 INFO L93 Difference]: Finished difference Result 349 states and 424 transitions. [2022-11-03 04:04:40,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-11-03 04:04:40,153 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 41 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-03 04:04:40,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:40,157 INFO L225 Difference]: With dead ends: 349 [2022-11-03 04:04:40,157 INFO L226 Difference]: Without dead ends: 347 [2022-11-03 04:04:40,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 147 SyntacticMatches, 6 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8380 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=4124, Invalid=22608, Unknown=0, NotChecked=0, Total=26732 [2022-11-03 04:04:40,160 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 368 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 1236 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 1540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 1236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:40,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 458 Invalid, 1540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 1236 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 04:04:40,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-11-03 04:04:40,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 137. [2022-11-03 04:04:40,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.286764705882353) internal successors, (175), 136 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:40,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 175 transitions. [2022-11-03 04:04:40,204 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 175 transitions. Word has length 33 [2022-11-03 04:04:40,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:40,204 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 175 transitions. [2022-11-03 04:04:40,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 41 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:40,205 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 175 transitions. [2022-11-03 04:04:40,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-03 04:04:40,205 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:40,206 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1] [2022-11-03 04:04:40,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:40,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2022-11-03 04:04:40,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-11-03 04:04:40,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:04:40,811 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:40,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:40,812 INFO L85 PathProgramCache]: Analyzing trace with hash 148995403, now seen corresponding path program 3 times [2022-11-03 04:04:40,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:40,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [912376069] [2022-11-03 04:04:40,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:04:40,812 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:40,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:40,814 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:40,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 04:04:40,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 04:04:40,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:04:40,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-03 04:04:40,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:41,705 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:41,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:43,397 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:43,397 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:43,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [912376069] [2022-11-03 04:04:43,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [912376069] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:43,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [304919104] [2022-11-03 04:04:43,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:04:43,398 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:43,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:04:43,399 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:04:43,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-03 04:04:43,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 04:04:43,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:04:43,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 04:04:43,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:43,887 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:43,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:44,017 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:44,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [304919104] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:44,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131861246] [2022-11-03 04:04:44,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:04:44,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:04:44,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:04:44,020 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:04:44,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-03 04:04:44,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 04:04:44,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:04:44,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-03 04:04:44,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:44,377 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:44,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:44,513 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:44,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131861246] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:44,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:04:44,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 23, 22, 22, 22] total 43 [2022-11-03 04:04:44,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759809000] [2022-11-03 04:04:44,514 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:04:44,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-03 04:04:44,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:44,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-03 04:04:44,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1666, Unknown=0, NotChecked=0, Total=1806 [2022-11-03 04:04:44,516 INFO L87 Difference]: Start difference. First operand 137 states and 175 transitions. Second operand has 43 states, 43 states have (on average 1.5348837209302326) internal successors, (66), 43 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:55,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:55,260 INFO L93 Difference]: Finished difference Result 341 states and 417 transitions. [2022-11-03 04:04:55,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-11-03 04:04:55,260 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.5348837209302326) internal successors, (66), 43 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-03 04:04:55,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:55,263 INFO L225 Difference]: With dead ends: 341 [2022-11-03 04:04:55,263 INFO L226 Difference]: Without dead ends: 339 [2022-11-03 04:04:55,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5563 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=3753, Invalid=15987, Unknown=0, NotChecked=0, Total=19740 [2022-11-03 04:04:55,266 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 464 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 1624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:55,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 247 Invalid, 1624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 04:04:55,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-11-03 04:04:55,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 170. [2022-11-03 04:04:55,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.2840236686390532) internal successors, (217), 169 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:55,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 217 transitions. [2022-11-03 04:04:55,327 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 217 transitions. Word has length 33 [2022-11-03 04:04:55,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:55,327 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 217 transitions. [2022-11-03 04:04:55,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.5348837209302326) internal successors, (66), 43 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:55,327 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 217 transitions. [2022-11-03 04:04:55,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-03 04:04:55,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:55,328 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1] [2022-11-03 04:04:55,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:55,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:55,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:55,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:04:55,932 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:55,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:55,933 INFO L85 PathProgramCache]: Analyzing trace with hash -298438073, now seen corresponding path program 5 times [2022-11-03 04:04:55,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:04:55,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282249525] [2022-11-03 04:04:55,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 04:04:55,933 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:04:55,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:04:55,935 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:04:55,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 04:04:55,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-03 04:04:55,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:04:55,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 04:04:56,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:56,833 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:04:56,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:58,691 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:58,691 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:04:58,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282249525] [2022-11-03 04:04:58,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282249525] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:58,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1452978955] [2022-11-03 04:04:58,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 04:04:58,692 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:04:58,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:04:58,693 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:04:58,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-03 04:04:58,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-03 04:04:58,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:04:58,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-03 04:04:58,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:04:59,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:59,188 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:59,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1452978955] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:59,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868025685] [2022-11-03 04:04:59,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 04:04:59,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:04:59,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:04:59,190 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:04:59,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-03 04:04:59,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-03 04:04:59,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:04:59,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-03 04:04:59,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:59,615 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 04:04:59,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:59,923 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:59,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868025685] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:59,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:04:59,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 23, 24, 24, 25] total 47 [2022-11-03 04:04:59,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355617804] [2022-11-03 04:04:59,924 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:04:59,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-03 04:04:59,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:04:59,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-03 04:04:59,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1996, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 04:04:59,925 INFO L87 Difference]: Start difference. First operand 170 states and 217 transitions. Second operand has 47 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 47 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:25,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:25,252 INFO L93 Difference]: Finished difference Result 513 states and 628 transitions. [2022-11-03 04:05:25,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-11-03 04:05:25,253 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 47 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-03 04:05:25,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:25,255 INFO L225 Difference]: With dead ends: 513 [2022-11-03 04:05:25,255 INFO L226 Difference]: Without dead ends: 511 [2022-11-03 04:05:25,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10220 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=4612, Invalid=27968, Unknown=0, NotChecked=0, Total=32580 [2022-11-03 04:05:25,259 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 634 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 1407 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 1877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 1407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:25,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 542 Invalid, 1877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 1407 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-03 04:05:25,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-11-03 04:05:25,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 231. [2022-11-03 04:05:25,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.2869565217391303) internal successors, (296), 230 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:25,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 296 transitions. [2022-11-03 04:05:25,338 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 296 transitions. Word has length 33 [2022-11-03 04:05:25,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:25,338 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 296 transitions. [2022-11-03 04:05:25,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 47 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:25,339 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 296 transitions. [2022-11-03 04:05:25,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 04:05:25,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:25,340 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1] [2022-11-03 04:05:25,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-03 04:05:25,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 0 [2022-11-03 04:05:25,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-11-03 04:05:25,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:05:25,943 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:05:25,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:25,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1212015929, now seen corresponding path program 6 times [2022-11-03 04:05:25,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:05:25,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [525207688] [2022-11-03 04:05:25,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-03 04:05:25,944 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:05:25,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:05:25,945 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:05:25,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 04:05:26,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-03 04:05:26,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:05:26,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-03 04:05:26,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:26,997 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 04:05:26,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:05:28,900 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:05:28,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [525207688] [2022-11-03 04:05:28,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [525207688] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:28,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [605166723] [2022-11-03 04:05:28,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-03 04:05:28,901 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:05:28,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:05:28,903 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:05:28,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-03 04:05:29,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-03 04:05:29,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:05:29,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-03 04:05:29,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 04:05:29,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:05:29,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [605166723] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:29,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123809725] [2022-11-03 04:05:29,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-03 04:05:29,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:05:29,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:05:29,854 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:05:29,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-03 04:05:29,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-03 04:05:29,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:05:29,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-03 04:05:29,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:30,329 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 04:05:30,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:30,642 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:05:30,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123809725] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:30,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:05:30,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 21, 23, 21, 23] total 42 [2022-11-03 04:05:30,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442640129] [2022-11-03 04:05:30,643 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:05:30,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-03 04:05:30,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:05:30,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-03 04:05:30,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1589, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 04:05:30,645 INFO L87 Difference]: Start difference. First operand 231 states and 296 transitions. Second operand has 42 states, 42 states have (on average 1.5238095238095237) internal successors, (64), 42 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:50,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:50,998 INFO L93 Difference]: Finished difference Result 513 states and 639 transitions. [2022-11-03 04:05:50,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-11-03 04:05:50,999 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.5238095238095237) internal successors, (64), 42 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-03 04:05:50,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:51,000 INFO L225 Difference]: With dead ends: 513 [2022-11-03 04:05:51,000 INFO L226 Difference]: Without dead ends: 511 [2022-11-03 04:05:51,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 182 SyntacticMatches, 12 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7716 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=4158, Invalid=20964, Unknown=0, NotChecked=0, Total=25122 [2022-11-03 04:05:51,003 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 510 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:51,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 374 Invalid, 1703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 1247 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 04:05:51,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-11-03 04:05:51,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 189. [2022-11-03 04:05:51,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.2872340425531914) internal successors, (242), 188 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:51,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 242 transitions. [2022-11-03 04:05:51,079 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 242 transitions. Word has length 40 [2022-11-03 04:05:51,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:51,079 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 242 transitions. [2022-11-03 04:05:51,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.5238095238095237) internal successors, (64), 42 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:05:51,080 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 242 transitions. [2022-11-03 04:05:51,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 04:05:51,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:51,081 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-03 04:05:51,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-11-03 04:05:51,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-11-03 04:05:51,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2022-11-03 04:05:51,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:05:51,682 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:05:51,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:51,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1793875577, now seen corresponding path program 3 times [2022-11-03 04:05:51,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:05:51,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248729156] [2022-11-03 04:05:51,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:05:51,683 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:05:51,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:05:51,684 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:05:51,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-03 04:05:51,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-03 04:05:51,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:05:51,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-03 04:05:51,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:52,695 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:05:52,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:54,668 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:05:54,668 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:05:54,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248729156] [2022-11-03 04:05:54,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248729156] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:54,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1894685095] [2022-11-03 04:05:54,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:05:54,668 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:05:54,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:05:54,669 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:05:54,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-03 04:05:54,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-03 04:05:54,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:05:54,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-03 04:05:54,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:55,239 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:05:55,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:55,508 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:05:55,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1894685095] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:55,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575431246] [2022-11-03 04:05:55,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:05:55,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:05:55,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:05:55,510 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:05:55,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-03 04:05:55,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-03 04:05:55,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:05:55,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-03 04:05:55,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:05:55,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:05:56,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575431246] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:56,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:05:56,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24, 24, 23, 24] total 46 [2022-11-03 04:05:56,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632525533] [2022-11-03 04:05:56,173 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:05:56,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-03 04:05:56,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:05:56,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-03 04:05:56,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1919, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 04:05:56,174 INFO L87 Difference]: Start difference. First operand 189 states and 242 transitions. Second operand has 46 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 46 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:06:18,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:06:18,112 INFO L93 Difference]: Finished difference Result 481 states and 597 transitions. [2022-11-03 04:06:18,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-11-03 04:06:18,112 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 46 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-03 04:06:18,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:06:18,115 INFO L225 Difference]: With dead ends: 481 [2022-11-03 04:06:18,115 INFO L226 Difference]: Without dead ends: 479 [2022-11-03 04:06:18,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 184 SyntacticMatches, 6 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8740 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=5444, Invalid=23968, Unknown=0, NotChecked=0, Total=29412 [2022-11-03 04:06:18,118 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 395 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 1650 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 1650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:06:18,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 137 Invalid, 1990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 1650 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 04:06:18,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-11-03 04:06:18,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 196. [2022-11-03 04:06:18,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.2871794871794873) internal successors, (251), 195 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:06:18,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 251 transitions. [2022-11-03 04:06:18,210 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 251 transitions. Word has length 40 [2022-11-03 04:06:18,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:06:18,210 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 251 transitions. [2022-11-03 04:06:18,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 46 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:06:18,211 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 251 transitions. [2022-11-03 04:06:18,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 04:06:18,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:06:18,212 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-03 04:06:18,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2022-11-03 04:06:18,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-11-03 04:06:18,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-03 04:06:18,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:06:18,816 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:06:18,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:06:18,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1067272643, now seen corresponding path program 4 times [2022-11-03 04:06:18,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:06:18,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864372220] [2022-11-03 04:06:18,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 04:06:18,817 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:06:18,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:06:18,818 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:06:18,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-03 04:06:18,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 04:06:18,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:06:18,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-03 04:06:18,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:06:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:06:19,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:06:22,084 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:06:22,085 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:06:22,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864372220] [2022-11-03 04:06:22,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864372220] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:06:22,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [935719740] [2022-11-03 04:06:22,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 04:06:22,085 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:06:22,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:06:22,091 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:06:22,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-03 04:06:22,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 04:06:22,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:06:22,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-03 04:06:22,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:06:22,598 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:06:22,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:06:22,906 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:06:22,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [935719740] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:06:22,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223892983] [2022-11-03 04:06:22,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 04:06:22,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:06:22,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:06:22,911 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:06:22,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-03 04:06:22,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 04:06:22,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:06:22,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-03 04:06:22,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:06:23,469 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:06:23,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:06:23,920 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:06:23,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223892983] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:06:23,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:06:23,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24, 24, 24, 25] total 48 [2022-11-03 04:06:23,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863471572] [2022-11-03 04:06:23,921 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:06:23,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 04:06:23,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:06:23,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 04:06:23,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2095, Unknown=0, NotChecked=0, Total=2256 [2022-11-03 04:06:23,923 INFO L87 Difference]: Start difference. First operand 196 states and 251 transitions. Second operand has 48 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 48 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:06:49,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:06:49,175 INFO L93 Difference]: Finished difference Result 556 states and 689 transitions. [2022-11-03 04:06:49,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-11-03 04:06:49,176 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 48 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-03 04:06:49,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:06:49,178 INFO L225 Difference]: With dead ends: 556 [2022-11-03 04:06:49,179 INFO L226 Difference]: Without dead ends: 554 [2022-11-03 04:06:49,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 182 SyntacticMatches, 6 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9259 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=5804, Invalid=25702, Unknown=0, NotChecked=0, Total=31506 [2022-11-03 04:06:49,182 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 583 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 1862 mSolverCounterSat, 499 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 2361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 499 IncrementalHoareTripleChecker+Valid, 1862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:06:49,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [583 Valid, 128 Invalid, 2361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [499 Valid, 1862 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-03 04:06:49,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-11-03 04:06:49,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 259. [2022-11-03 04:06:49,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.2868217054263567) internal successors, (332), 258 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:06:49,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 332 transitions. [2022-11-03 04:06:49,274 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 332 transitions. Word has length 40 [2022-11-03 04:06:49,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:06:49,275 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 332 transitions. [2022-11-03 04:06:49,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 48 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:06:49,275 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 332 transitions. [2022-11-03 04:06:49,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 04:06:49,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:06:49,276 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-03 04:06:49,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-11-03 04:06:49,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2022-11-03 04:06:49,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0 [2022-11-03 04:06:49,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:06:49,887 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:06:49,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:06:49,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1999447559, now seen corresponding path program 5 times [2022-11-03 04:06:49,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:06:49,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1947635821] [2022-11-03 04:06:49,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 04:06:49,888 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:06:49,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:06:49,889 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:06:49,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-03 04:06:49,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-03 04:06:49,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:06:49,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-03 04:06:49,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:06:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 04:06:50,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:06:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:06:53,354 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:06:53,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1947635821] [2022-11-03 04:06:53,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1947635821] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:06:53,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1424010130] [2022-11-03 04:06:53,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 04:06:53,355 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:06:53,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:06:53,357 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:06:53,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-11-03 04:06:53,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-03 04:06:53,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:06:53,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-03 04:06:53,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:06:53,846 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 04:06:53,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:06:54,494 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:06:54,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1424010130] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:06:54,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443816851] [2022-11-03 04:06:54,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 04:06:54,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:06:54,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:06:54,496 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:06:54,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-03 04:06:54,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-03 04:06:54,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:06:54,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-03 04:06:54,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:06:54,961 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:06:54,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:06:55,465 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:06:55,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443816851] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:06:55,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:06:55,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 25, 27, 26, 27] total 53 [2022-11-03 04:06:55,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695443475] [2022-11-03 04:06:55,466 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:06:55,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-03 04:06:55,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:06:55,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-03 04:06:55,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=2569, Unknown=0, NotChecked=0, Total=2756 [2022-11-03 04:06:55,467 INFO L87 Difference]: Start difference. First operand 259 states and 332 transitions. Second operand has 53 states, 53 states have (on average 1.5660377358490567) internal successors, (83), 53 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:29,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:29,846 INFO L93 Difference]: Finished difference Result 770 states and 948 transitions. [2022-11-03 04:07:29,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2022-11-03 04:07:29,847 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.5660377358490567) internal successors, (83), 53 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-03 04:07:29,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:29,848 INFO L225 Difference]: With dead ends: 770 [2022-11-03 04:07:29,848 INFO L226 Difference]: Without dead ends: 768 [2022-11-03 04:07:29,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 179 SyntacticMatches, 4 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17467 ImplicationChecksByTransitivity, 34.9s TimeCoverageRelationStatistics Valid=8977, Invalid=42325, Unknown=0, NotChecked=0, Total=51302 [2022-11-03 04:07:29,851 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 732 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 2113 mSolverCounterSat, 621 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 2734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 621 IncrementalHoareTripleChecker+Valid, 2113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:29,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [732 Valid, 213 Invalid, 2734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [621 Valid, 2113 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-03 04:07:29,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2022-11-03 04:07:29,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 266. [2022-11-03 04:07:29,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 1.2867924528301886) internal successors, (341), 265 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:29,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 341 transitions. [2022-11-03 04:07:29,977 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 341 transitions. Word has length 40 [2022-11-03 04:07:29,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:29,977 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 341 transitions. [2022-11-03 04:07:29,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.5660377358490567) internal successors, (83), 53 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:07:29,977 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 341 transitions. [2022-11-03 04:07:29,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 04:07:29,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:29,978 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1] [2022-11-03 04:07:29,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:30,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-11-03 04:07:30,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (55)] Ended with exit code 0 [2022-11-03 04:07:30,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:07:30,579 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:30,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:30,579 INFO L85 PathProgramCache]: Analyzing trace with hash 877483517, now seen corresponding path program 7 times [2022-11-03 04:07:30,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:30,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [529232494] [2022-11-03 04:07:30,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 04:07:30,580 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:30,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:30,583 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:30,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-03 04:07:30,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:30,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-03 04:07:30,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:31,609 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:07:31,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:33,944 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:07:33,944 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:33,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [529232494] [2022-11-03 04:07:33,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [529232494] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:33,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [271681410] [2022-11-03 04:07:33,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 04:07:33,945 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:07:33,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:07:33,946 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:07:33,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-11-03 04:07:34,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:34,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-03 04:07:34,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:34,460 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:07:34,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:34,714 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:07:34,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [271681410] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:34,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410933328] [2022-11-03 04:07:34,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 04:07:34,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:34,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:07:34,715 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:07:34,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-03 04:07:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:34,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-03 04:07:34,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 04:07:35,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:35,645 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:07:35,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410933328] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:35,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:07:35,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 24, 26, 25, 27] total 50 [2022-11-03 04:07:35,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921554288] [2022-11-03 04:07:35,646 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:07:35,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-03 04:07:35,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:35,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-03 04:07:35,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2271, Unknown=0, NotChecked=0, Total=2450 [2022-11-03 04:07:35,648 INFO L87 Difference]: Start difference. First operand 266 states and 341 transitions. Second operand has 50 states, 50 states have (on average 1.46) internal successors, (73), 50 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:05,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:08:05,631 INFO L93 Difference]: Finished difference Result 705 states and 879 transitions. [2022-11-03 04:08:05,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-11-03 04:08:05,632 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.46) internal successors, (73), 50 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-03 04:08:05,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:08:05,635 INFO L225 Difference]: With dead ends: 705 [2022-11-03 04:08:05,635 INFO L226 Difference]: Without dead ends: 703 [2022-11-03 04:08:05,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 180 SyntacticMatches, 6 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11915 ImplicationChecksByTransitivity, 30.2s TimeCoverageRelationStatistics Valid=5683, Invalid=31373, Unknown=0, NotChecked=0, Total=37056 [2022-11-03 04:08:05,639 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 673 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 1609 mSolverCounterSat, 571 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 2180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 571 IncrementalHoareTripleChecker+Valid, 1609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:08:05,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 454 Invalid, 2180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [571 Valid, 1609 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 04:08:05,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-11-03 04:08:05,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 306. [2022-11-03 04:08:05,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.2885245901639344) internal successors, (393), 305 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:05,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 393 transitions. [2022-11-03 04:08:05,781 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 393 transitions. Word has length 40 [2022-11-03 04:08:05,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:08:05,782 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 393 transitions. [2022-11-03 04:08:05,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.46) internal successors, (73), 50 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:05,782 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 393 transitions. [2022-11-03 04:08:05,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 04:08:05,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:08:05,783 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1] [2022-11-03 04:08:05,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-11-03 04:08:05,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 0 [2022-11-03 04:08:06,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Ended with exit code 0 [2022-11-03 04:08:06,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:08:06,384 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:08:06,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:08:06,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1983664703, now seen corresponding path program 8 times [2022-11-03 04:08:06,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:08:06,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940819344] [2022-11-03 04:08:06,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:08:06,384 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:08:06,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:08:06,385 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:08:06,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-03 04:08:06,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:08:06,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:06,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-03 04:08:06,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:07,405 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:08:07,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:09,866 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:08:09,866 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:08:09,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940819344] [2022-11-03 04:08:09,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940819344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:09,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1512396607] [2022-11-03 04:08:09,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:08:09,867 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:08:09,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:08:09,868 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:08:09,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2022-11-03 04:08:09,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:08:09,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:09,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-03 04:08:09,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:10,324 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:08:10,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:10,591 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:08:10,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1512396607] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:10,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417231032] [2022-11-03 04:08:10,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:08:10,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:08:10,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:08:10,593 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:08:10,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-03 04:08:10,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:08:10,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:10,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-03 04:08:10,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:11,079 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:08:11,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:08:11,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417231032] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:11,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:08:11,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 24, 26, 24, 26] total 48 [2022-11-03 04:08:11,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271118472] [2022-11-03 04:08:11,360 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:08:11,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 04:08:11,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:08:11,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 04:08:11,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=2093, Unknown=0, NotChecked=0, Total=2256 [2022-11-03 04:08:11,362 INFO L87 Difference]: Start difference. First operand 306 states and 393 transitions. Second operand has 48 states, 48 states have (on average 1.4375) internal successors, (69), 48 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:45,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:08:45,170 INFO L93 Difference]: Finished difference Result 824 states and 1025 transitions. [2022-11-03 04:08:45,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-11-03 04:08:45,171 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.4375) internal successors, (69), 48 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-03 04:08:45,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:08:45,175 INFO L225 Difference]: With dead ends: 824 [2022-11-03 04:08:45,175 INFO L226 Difference]: Without dead ends: 822 [2022-11-03 04:08:45,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 182 SyntacticMatches, 6 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12155 ImplicationChecksByTransitivity, 33.7s TimeCoverageRelationStatistics Valid=5555, Invalid=31501, Unknown=0, NotChecked=0, Total=37056 [2022-11-03 04:08:45,179 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 855 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 1545 mSolverCounterSat, 707 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 2252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 707 IncrementalHoareTripleChecker+Valid, 1545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:08:45,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [855 Valid, 528 Invalid, 2252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [707 Valid, 1545 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 04:08:45,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2022-11-03 04:08:45,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 404. [2022-11-03 04:08:45,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.2878411910669976) internal successors, (519), 403 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) [2022-11-03 04:08:45,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 519 transitions. [2022-11-03 04:08:45,419 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 519 transitions. Word has length 40 [2022-11-03 04:08:45,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:08:45,419 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 519 transitions. [2022-11-03 04:08:45,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.4375) internal successors, (69), 48 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:45,420 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 519 transitions. [2022-11-03 04:08:45,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 04:08:45,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:08:45,421 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 4, 2, 1, 1, 1, 1, 1] [2022-11-03 04:08:45,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2022-11-03 04:08:45,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (61)] Ended with exit code 0 [2022-11-03 04:08:45,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-11-03 04:08:46,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:08:46,033 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:08:46,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:08:46,034 INFO L85 PathProgramCache]: Analyzing trace with hash -453471929, now seen corresponding path program 6 times [2022-11-03 04:08:46,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:08:46,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1153189020] [2022-11-03 04:08:46,034 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-03 04:08:46,034 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:08:46,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:08:46,035 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:08:46,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-03 04:08:46,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-03 04:08:46,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:46,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-03 04:08:46,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:47,274 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 04:08:47,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:49,730 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:08:49,730 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:08:49,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1153189020] [2022-11-03 04:08:49,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1153189020] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:49,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [626669869] [2022-11-03 04:08:49,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-03 04:08:49,731 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:08:49,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:08:49,732 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:08:49,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2022-11-03 04:08:49,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-03 04:08:49,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:49,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-03 04:08:49,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:50,417 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 04:08:50,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:50,785 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:08:50,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [626669869] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:50,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472703407] [2022-11-03 04:08:50,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-03 04:08:50,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:08:50,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:08:50,788 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:08:50,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-11-03 04:08:50,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-03 04:08:50,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:50,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-03 04:08:50,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:51,313 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 04:08:51,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:51,703 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:08:51,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472703407] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:51,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:08:51,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 25, 26, 24, 26] total 49 [2022-11-03 04:08:51,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251524968] [2022-11-03 04:08:51,704 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:08:51,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-03 04:08:51,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:08:51,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-03 04:08:51,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2188, Unknown=0, NotChecked=0, Total=2352 [2022-11-03 04:08:51,705 INFO L87 Difference]: Start difference. First operand 404 states and 519 transitions. Second operand has 49 states, 49 states have (on average 1.6326530612244898) internal successors, (80), 49 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:18,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:09:18,631 INFO L93 Difference]: Finished difference Result 829 states and 1041 transitions. [2022-11-03 04:09:18,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-11-03 04:09:18,633 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6326530612244898) internal successors, (80), 49 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-03 04:09:18,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:09:18,635 INFO L225 Difference]: With dead ends: 829 [2022-11-03 04:09:18,636 INFO L226 Difference]: Without dead ends: 827 [2022-11-03 04:09:18,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 217 SyntacticMatches, 12 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10409 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=6219, Invalid=27453, Unknown=0, NotChecked=0, Total=33672 [2022-11-03 04:09:18,638 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 681 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 1835 mSolverCounterSat, 593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 2428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 593 IncrementalHoareTripleChecker+Valid, 1835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:09:18,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [681 Valid, 110 Invalid, 2428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [593 Valid, 1835 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-03 04:09:18,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-11-03 04:09:18,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 383. [2022-11-03 04:09:18,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 1.287958115183246) internal successors, (492), 382 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) [2022-11-03 04:09:18,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 492 transitions. [2022-11-03 04:09:18,972 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 492 transitions. Word has length 47 [2022-11-03 04:09:18,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:09:18,973 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 492 transitions. [2022-11-03 04:09:18,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6326530612244898) internal successors, (80), 49 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:18,973 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 492 transitions. [2022-11-03 04:09:18,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 04:09:18,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:09:18,975 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 4, 2, 1, 1, 1, 1, 1] [2022-11-03 04:09:18,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (64)] Forceful destruction successful, exit code 0 [2022-11-03 04:09:19,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-11-03 04:09:19,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-11-03 04:09:19,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:09:19,578 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:09:19,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:09:19,578 INFO L85 PathProgramCache]: Analyzing trace with hash -788004341, now seen corresponding path program 7 times [2022-11-03 04:09:19,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:09:19,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1459289877] [2022-11-03 04:09:19,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 04:09:19,579 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:09:19,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:09:19,580 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:09:19,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-03 04:09:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:09:19,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-03 04:09:19,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:09:20,900 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 04:09:20,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:09:24,166 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 04:09:24,166 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:09:24,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1459289877] [2022-11-03 04:09:24,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1459289877] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:09:24,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1981914092] [2022-11-03 04:09:24,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 04:09:24,167 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:09:24,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:09:24,168 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:09:24,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2022-11-03 04:09:24,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:09:24,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-03 04:09:24,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:09:24,869 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 04:09:24,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:09:25,310 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 04:09:25,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1981914092] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:09:25,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983624345] [2022-11-03 04:09:25,310 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 04:09:25,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:09:25,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:09:25,311 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:09:25,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-11-03 04:09:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:09:25,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-03 04:09:25,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:09:25,988 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 04:09:25,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:09:26,605 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 04:09:26,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983624345] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:09:26,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:09:26,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 27, 28, 27, 29] total 55 [2022-11-03 04:09:26,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814585538] [2022-11-03 04:09:26,606 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:09:26,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-03 04:09:26,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:09:26,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-03 04:09:26,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2776, Unknown=0, NotChecked=0, Total=2970 [2022-11-03 04:09:26,607 INFO L87 Difference]: Start difference. First operand 383 states and 492 transitions. Second operand has 55 states, 55 states have (on average 1.6) internal successors, (88), 55 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:00,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:00,919 INFO L93 Difference]: Finished difference Result 874 states and 1091 transitions. [2022-11-03 04:10:00,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-11-03 04:10:00,920 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.6) internal successors, (88), 55 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-03 04:10:00,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:00,921 INFO L225 Difference]: With dead ends: 874 [2022-11-03 04:10:00,921 INFO L226 Difference]: Without dead ends: 872 [2022-11-03 04:10:00,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 214 SyntacticMatches, 9 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12518 ImplicationChecksByTransitivity, 35.5s TimeCoverageRelationStatistics Valid=7319, Invalid=33283, Unknown=0, NotChecked=0, Total=40602 [2022-11-03 04:10:00,924 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 719 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 2361 mSolverCounterSat, 600 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 2961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 600 IncrementalHoareTripleChecker+Valid, 2361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:00,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [719 Valid, 83 Invalid, 2961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [600 Valid, 2361 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-03 04:10:00,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2022-11-03 04:10:01,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 341. [2022-11-03 04:10:01,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.2882352941176471) internal successors, (438), 340 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:01,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 438 transitions. [2022-11-03 04:10:01,104 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 438 transitions. Word has length 47 [2022-11-03 04:10:01,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:01,104 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 438 transitions. [2022-11-03 04:10:01,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.6) internal successors, (88), 55 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:01,104 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 438 transitions. [2022-11-03 04:10:01,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 04:10:01,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:01,105 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 4, 2, 1, 1, 1, 1, 1] [2022-11-03 04:10:01,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (67)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:01,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:01,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-11-03 04:10:01,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:10:01,708 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:01,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:01,709 INFO L85 PathProgramCache]: Analyzing trace with hash 645814735, now seen corresponding path program 8 times [2022-11-03 04:10:01,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:01,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2041545166] [2022-11-03 04:10:01,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:10:01,709 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:01,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:01,710 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:01,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-03 04:10:01,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:10:01,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:10:01,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-03 04:10:01,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:02,984 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 04:10:02,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:10:06,156 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 04:10:06,156 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:06,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2041545166] [2022-11-03 04:10:06,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2041545166] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:10:06,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1289232971] [2022-11-03 04:10:06,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:10:06,157 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:10:06,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:10:06,159 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:10:06,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2022-11-03 04:10:06,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:10:06,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:10:06,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-03 04:10:06,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:06,774 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 04:10:06,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:10:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 04:10:07,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1289232971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:10:07,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925456582] [2022-11-03 04:10:07,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:10:07,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:10:07,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:10:07,291 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:10:07,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-11-03 04:10:07,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:10:07,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:10:07,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-03 04:10:07,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:07,766 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 04:10:07,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:10:08,258 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 04:10:08,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925456582] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:10:08,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:10:08,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 27, 28, 26, 28] total 53 [2022-11-03 04:10:08,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702094064] [2022-11-03 04:10:08,259 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:10:08,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-03 04:10:08,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:08,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-03 04:10:08,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2572, Unknown=0, NotChecked=0, Total=2756 [2022-11-03 04:10:08,261 INFO L87 Difference]: Start difference. First operand 341 states and 438 transitions. Second operand has 53 states, 53 states have (on average 1.5849056603773586) internal successors, (84), 53 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:47,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:47,563 INFO L93 Difference]: Finished difference Result 953 states and 1184 transitions. [2022-11-03 04:10:47,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2022-11-03 04:10:47,563 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.5849056603773586) internal successors, (84), 53 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-03 04:10:47,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:47,566 INFO L225 Difference]: With dead ends: 953 [2022-11-03 04:10:47,567 INFO L226 Difference]: Without dead ends: 951 [2022-11-03 04:10:47,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 216 SyntacticMatches, 9 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17798 ImplicationChecksByTransitivity, 39.8s TimeCoverageRelationStatistics Valid=8735, Invalid=42567, Unknown=0, NotChecked=0, Total=51302 [2022-11-03 04:10:47,570 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 999 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 2321 mSolverCounterSat, 826 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 999 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 3147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 826 IncrementalHoareTripleChecker+Valid, 2321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:47,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [999 Valid, 147 Invalid, 3147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [826 Valid, 2321 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-03 04:10:47,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2022-11-03 04:10:47,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 276. [2022-11-03 04:10:47,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 1.2872727272727273) internal successors, (354), 275 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:47,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 354 transitions. [2022-11-03 04:10:47,739 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 354 transitions. Word has length 47 [2022-11-03 04:10:47,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:47,740 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 354 transitions. [2022-11-03 04:10:47,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.5849056603773586) internal successors, (84), 53 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:47,740 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 354 transitions. [2022-11-03 04:10:47,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 04:10:47,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:47,740 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 3, 3, 1, 1, 1, 1] [2022-11-03 04:10:47,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-11-03 04:10:47,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-03 04:10:48,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (70)] Ended with exit code 0 [2022-11-03 04:10:48,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:10:48,341 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:48,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:48,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1577132733, now seen corresponding path program 9 times [2022-11-03 04:10:48,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:10:48,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [855303136] [2022-11-03 04:10:48,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:10:48,342 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:10:48,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:10:48,343 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:10:48,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-03 04:10:48,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-03 04:10:48,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:10:48,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-03 04:10:48,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:49,620 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:10:49,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:10:52,792 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:10:52,792 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:10:52,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [855303136] [2022-11-03 04:10:52,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [855303136] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:10:52,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [810762688] [2022-11-03 04:10:52,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:10:52,793 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:10:52,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:10:52,794 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:10:52,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (73)] Waiting until timeout for monitored process [2022-11-03 04:10:52,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-03 04:10:52,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:10:52,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-03 04:10:52,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:10:53,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:10:53,871 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:10:53,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [810762688] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:10:53,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250375955] [2022-11-03 04:10:53,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:10:53,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:10:53,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:10:53,873 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:10:53,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-11-03 04:10:53,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-03 04:10:53,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:10:53,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-03 04:10:53,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:10:54,519 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:10:54,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:10:54,973 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:10:54,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250375955] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:10:54,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:10:54,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 28, 25, 28, 25, 28] total 51 [2022-11-03 04:10:54,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947636919] [2022-11-03 04:10:54,973 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:10:54,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-03 04:10:54,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:10:54,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-03 04:10:54,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2373, Unknown=0, NotChecked=0, Total=2550 [2022-11-03 04:10:54,975 INFO L87 Difference]: Start difference. First operand 276 states and 354 transitions. Second operand has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 51 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:26,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:26,517 INFO L93 Difference]: Finished difference Result 838 states and 1058 transitions. [2022-11-03 04:11:26,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-11-03 04:11:26,519 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 51 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-03 04:11:26,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:26,522 INFO L225 Difference]: With dead ends: 838 [2022-11-03 04:11:26,522 INFO L226 Difference]: Without dead ends: 836 [2022-11-03 04:11:26,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 215 SyntacticMatches, 12 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9216 ImplicationChecksByTransitivity, 31.9s TimeCoverageRelationStatistics Valid=4888, Invalid=25562, Unknown=0, NotChecked=0, Total=30450 [2022-11-03 04:11:26,526 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 945 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 1718 mSolverCounterSat, 869 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 2587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 869 IncrementalHoareTripleChecker+Valid, 1718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:26,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [945 Valid, 504 Invalid, 2587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [869 Valid, 1718 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-03 04:11:26,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-11-03 04:11:26,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 304. [2022-11-03 04:11:26,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 1.2871287128712872) internal successors, (390), 303 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:26,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 390 transitions. [2022-11-03 04:11:26,754 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 390 transitions. Word has length 47 [2022-11-03 04:11:26,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:26,755 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 390 transitions. [2022-11-03 04:11:26,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 51 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:26,755 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 390 transitions. [2022-11-03 04:11:26,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 04:11:26,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:26,757 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1] [2022-11-03 04:11:26,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Ended with exit code 0 [2022-11-03 04:11:26,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:27,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (73)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:27,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:11:27,364 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:27,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:27,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1330079165, now seen corresponding path program 3 times [2022-11-03 04:11:27,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:27,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [758895828] [2022-11-03 04:11:27,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:11:27,365 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:27,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:27,371 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:27,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-03 04:11:27,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-03 04:11:27,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:11:27,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-03 04:11:27,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:31,680 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:31,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:11:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:41,716 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:41,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [758895828] [2022-11-03 04:11:41,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [758895828] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:11:41,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [905458119] [2022-11-03 04:11:41,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:11:41,717 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:11:41,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:11:41,718 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:11:41,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (76)] Waiting until timeout for monitored process [2022-11-03 04:11:41,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-03 04:11:41,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:11:41,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-03 04:11:41,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:42,647 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:42,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:11:42,985 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:42,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [905458119] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:11:42,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152809114] [2022-11-03 04:11:42,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:11:42,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:11:42,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:11:42,987 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:11:42,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-11-03 04:11:43,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-03 04:11:43,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:11:43,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-03 04:11:43,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:43,819 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:43,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:11:44,180 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:44,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152809114] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:11:44,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:11:44,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39, 39, 39, 39] total 76 [2022-11-03 04:11:44,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123381003] [2022-11-03 04:11:44,181 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:11:44,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-03 04:11:44,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:44,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-03 04:11:44,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=5321, Unknown=0, NotChecked=0, Total=5700 [2022-11-03 04:11:44,183 INFO L87 Difference]: Start difference. First operand 304 states and 390 transitions. Second operand has 76 states, 76 states have (on average 1.394736842105263) internal successors, (106), 76 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:55,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:55,781 INFO L93 Difference]: Finished difference Result 656 states and 808 transitions. [2022-11-03 04:12:55,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2022-11-03 04:12:55,781 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.394736842105263) internal successors, (106), 76 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-11-03 04:12:55,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:55,783 INFO L225 Difference]: With dead ends: 656 [2022-11-03 04:12:55,783 INFO L226 Difference]: Without dead ends: 654 [2022-11-03 04:12:55,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18228 ImplicationChecksByTransitivity, 77.7s TimeCoverageRelationStatistics Valid=9701, Invalid=54055, Unknown=0, NotChecked=0, Total=63756 [2022-11-03 04:12:55,788 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1547 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 3041 mSolverCounterSat, 946 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1547 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 3987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 946 IncrementalHoareTripleChecker+Valid, 3041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:55,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1547 Valid, 1152 Invalid, 3987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [946 Valid, 3041 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-11-03 04:12:55,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2022-11-03 04:12:56,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 392. [2022-11-03 04:12:56,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 1.2864450127877238) internal successors, (503), 391 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:56,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 503 transitions. [2022-11-03 04:12:56,098 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 503 transitions. Word has length 54 [2022-11-03 04:12:56,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:56,099 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 503 transitions. [2022-11-03 04:12:56,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.394736842105263) internal successors, (106), 76 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:56,099 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 503 transitions. [2022-11-03 04:12:56,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 04:12:56,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:56,101 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 4, 3, 1, 1, 1, 1, 1] [2022-11-03 04:12:56,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (75)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:56,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-11-03 04:12:56,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (76)] Ended with exit code 0 [2022-11-03 04:12:56,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:12:56,716 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:56,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:56,716 INFO L85 PathProgramCache]: Analyzing trace with hash 410723701, now seen corresponding path program 9 times [2022-11-03 04:12:56,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:12:56,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725206722] [2022-11-03 04:12:56,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:12:56,717 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:12:56,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:12:56,718 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:12:56,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-03 04:12:56,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-03 04:12:56,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:12:56,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-03 04:12:56,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:58,368 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 04:12:58,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:13:02,620 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:13:02,620 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:13:02,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725206722] [2022-11-03 04:13:02,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725206722] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:13:02,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1441163962] [2022-11-03 04:13:02,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:13:02,620 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:13:02,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:13:02,622 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:13:02,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (79)] Waiting until timeout for monitored process [2022-11-03 04:13:02,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-03 04:13:02,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:13:02,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-03 04:13:02,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 04:13:03,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:13:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:13:04,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1441163962] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:13:04,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094128774] [2022-11-03 04:13:04,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:13:04,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:13:04,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:13:04,241 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:13:04,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-11-03 04:13:04,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-03 04:13:04,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:13:04,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-03 04:13:04,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:04,905 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 04:13:04,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:13:05,595 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:13:05,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094128774] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:13:05,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:13:05,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 30, 28, 30, 27, 30] total 56 [2022-11-03 04:13:05,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218334193] [2022-11-03 04:13:05,596 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:13:05,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-03 04:13:05,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:13:05,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-03 04:13:05,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=2881, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 04:13:05,598 INFO L87 Difference]: Start difference. First operand 392 states and 503 transitions. Second operand has 56 states, 56 states have (on average 1.625) internal successors, (91), 56 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:44,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:13:44,532 INFO L93 Difference]: Finished difference Result 729 states and 915 transitions. [2022-11-03 04:13:44,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-11-03 04:13:44,533 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.625) internal successors, (91), 56 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-11-03 04:13:44,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:13:44,536 INFO L225 Difference]: With dead ends: 729 [2022-11-03 04:13:44,536 INFO L226 Difference]: Without dead ends: 727 [2022-11-03 04:13:44,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 249 SyntacticMatches, 15 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13044 ImplicationChecksByTransitivity, 40.4s TimeCoverageRelationStatistics Valid=7358, Invalid=33648, Unknown=0, NotChecked=0, Total=41006 [2022-11-03 04:13:44,541 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1135 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2502 mSolverCounterSat, 970 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 3472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 970 IncrementalHoareTripleChecker+Valid, 2502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:13:44,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1135 Valid, 126 Invalid, 3472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [970 Valid, 2502 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-03 04:13:44,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2022-11-03 04:13:44,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 153. [2022-11-03 04:13:44,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.2828947368421053) internal successors, (195), 152 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:44,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 195 transitions. [2022-11-03 04:13:44,701 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 195 transitions. Word has length 54 [2022-11-03 04:13:44,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:13:44,701 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 195 transitions. [2022-11-03 04:13:44,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.625) internal successors, (91), 56 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:44,701 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 195 transitions. [2022-11-03 04:13:44,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 04:13:44,702 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:44,702 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1] [2022-11-03 04:13:44,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (78)] Ended with exit code 0 [2022-11-03 04:13:44,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-11-03 04:13:45,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (79)] Ended with exit code 0 [2022-11-03 04:13:45,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:13:45,303 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:13:45,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:13:45,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1809281479, now seen corresponding path program 10 times [2022-11-03 04:13:45,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:13:45,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [22780927] [2022-11-03 04:13:45,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 04:13:45,304 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:13:45,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:13:45,305 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:13:45,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-03 04:13:45,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 04:13:45,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:13:45,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-03 04:13:45,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:13:49,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:14:00,888 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:14:00,888 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:00,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [22780927] [2022-11-03 04:14:00,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [22780927] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:14:00,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [276401282] [2022-11-03 04:14:00,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 04:14:00,889 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:14:00,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:14:00,895 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:14:00,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (82)] Waiting until timeout for monitored process [2022-11-03 04:14:01,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 04:14:01,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:14:01,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-03 04:14:01,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:02,117 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:14:02,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:14:02,685 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:14:02,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [276401282] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:14:02,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733242191] [2022-11-03 04:14:02,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 04:14:02,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:14:02,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:14:02,687 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:14:02,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-11-03 04:14:02,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 04:14:02,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:14:02,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-03 04:14:02,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:03,991 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:14:03,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:14:05,082 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:14:05,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733242191] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:14:05,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:14:05,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41, 40, 41, 41, 42] total 81 [2022-11-03 04:14:05,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187211928] [2022-11-03 04:14:05,083 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:14:05,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-11-03 04:14:05,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:05,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-11-03 04:14:05,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=6064, Unknown=0, NotChecked=0, Total=6480 [2022-11-03 04:14:05,085 INFO L87 Difference]: Start difference. First operand 153 states and 195 transitions. Second operand has 81 states, 81 states have (on average 1.4444444444444444) internal successors, (117), 81 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:16:06,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:16:06,728 INFO L93 Difference]: Finished difference Result 582 states and 711 transitions. [2022-11-03 04:16:06,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 264 states. [2022-11-03 04:16:06,729 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.4444444444444444) internal successors, (117), 81 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-11-03 04:16:06,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:16:06,730 INFO L225 Difference]: With dead ends: 582 [2022-11-03 04:16:06,730 INFO L226 Difference]: Without dead ends: 580 [2022-11-03 04:16:06,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 275 SyntacticMatches, 6 SemanticMatches, 337 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37315 ImplicationChecksByTransitivity, 127.6s TimeCoverageRelationStatistics Valid=16367, Invalid=98215, Unknown=0, NotChecked=0, Total=114582 [2022-11-03 04:16:06,736 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1451 mSDsluCounter, 1133 mSDsCounter, 0 mSdLazyCounter, 4130 mSolverCounterSat, 1208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1451 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 5338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1208 IncrementalHoareTripleChecker+Valid, 4130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:16:06,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1451 Valid, 1146 Invalid, 5338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1208 Valid, 4130 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2022-11-03 04:16:06,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-11-03 04:16:06,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 146. [2022-11-03 04:16:06,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.282758620689655) internal successors, (186), 145 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:16:06,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 186 transitions. [2022-11-03 04:16:06,933 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 186 transitions. Word has length 61 [2022-11-03 04:16:06,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:16:06,934 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 186 transitions. [2022-11-03 04:16:06,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.4444444444444444) internal successors, (117), 81 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:16:06,934 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 186 transitions. [2022-11-03 04:16:06,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 04:16:06,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:16:06,935 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1] [2022-11-03 04:16:06,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (82)] Forceful destruction successful, exit code 0 [2022-11-03 04:16:07,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Forceful destruction successful, exit code 0 [2022-11-03 04:16:07,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-11-03 04:16:07,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:16:07,538 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:16:07,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:16:07,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1051866741, now seen corresponding path program 11 times [2022-11-03 04:16:07,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:16:07,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [601270270] [2022-11-03 04:16:07,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 04:16:07,539 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:16:07,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:16:07,540 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:16:07,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-03 04:16:07,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-11-03 04:16:07,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:16:07,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-03 04:16:07,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:16:11,241 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:16:11,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:16:20,480 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:16:20,480 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:16:20,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [601270270] [2022-11-03 04:16:20,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [601270270] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:16:20,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [96343789] [2022-11-03 04:16:20,481 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 04:16:20,481 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:16:20,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:16:20,482 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:16:20,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (85)] Waiting until timeout for monitored process [2022-11-03 04:16:20,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-11-03 04:16:20,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:16:20,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 105 conjunts are in the unsatisfiable core [2022-11-03 04:16:20,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:16:21,474 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:16:21,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:16:23,466 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:16:23,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [96343789] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:16:23,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498457409] [2022-11-03 04:16:23,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 04:16:23,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:16:23,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:16:23,468 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:16:23,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_770e0710-4c50-4b04-ac88-21d124b5a8d9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-11-03 04:16:23,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-11-03 04:16:23,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:16:23,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-03 04:16:23,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:16:24,585 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:16:24,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:16:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:16:25,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498457409] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:16:25,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:16:25,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41, 40, 42, 41, 42] total 85 [2022-11-03 04:16:25,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845555883] [2022-11-03 04:16:25,539 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:16:25,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-11-03 04:16:25,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:16:25,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-11-03 04:16:25,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=454, Invalid=6686, Unknown=0, NotChecked=0, Total=7140 [2022-11-03 04:16:25,541 INFO L87 Difference]: Start difference. First operand 146 states and 186 transitions. Second operand has 85 states, 85 states have (on average 1.4470588235294117) internal successors, (123), 85 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)