./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl --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 32bit --witnessprinter.graph.data.programhash a0e1e4b700be1f29c3e51242b4a74b80feb10d65ba6788a48a42ab27b5c7017d --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:44:56,288 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:44:56,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:44:56,342 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:44:56,342 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:44:56,348 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:44:56,352 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:44:56,357 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:44:56,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:44:56,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:44:56,369 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:44:56,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:44:56,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:44:56,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:44:56,374 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:44:56,376 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:44:56,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:44:56,384 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:44:56,390 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:44:56,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:44:56,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:44:56,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:44:56,405 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:44:56,406 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:44:56,413 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:44:56,413 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:44:56,413 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:44:56,416 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:44:56,417 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:44:56,418 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:44:56,419 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:44:56,420 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:44:56,422 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:44:56,423 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:44:56,425 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:44:56,425 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:44:56,426 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:44:56,426 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:44:56,427 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:44:56,428 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:44:56,429 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:44:56,430 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 16:44:56,463 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:44:56,463 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:44:56,464 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:44:56,464 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:44:56,465 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:44:56,465 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:44:56,465 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:44:56,466 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:44:56,466 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:44:56,466 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:44:56,466 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:44:56,467 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:44:56,467 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:44:56,467 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:44:56,467 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:44:56,468 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:44:56,468 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:44:56,468 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:44:56,469 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:44:56,469 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:44:56,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:44:56,470 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:44:56,470 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:44:56,470 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:44:56,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:44:56,471 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:44:56,471 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:44:56,471 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:44:56,471 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:44:56,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:44:56,472 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:44:56,472 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:44:56,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:44:56,473 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:44:56,473 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:44:56,473 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:44:56,473 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:44:56,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:44:56,474 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:44:56,474 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:44:56,474 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:44:56,474 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0e1e4b700be1f29c3e51242b4a74b80feb10d65ba6788a48a42ab27b5c7017d [2021-11-23 16:44:56,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:44:56,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:44:56,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:44:56,817 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:44:56,818 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:44:56,820 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c [2021-11-23 16:44:56,903 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/data/b19b20b4a/16bd8166a1b844948d1246d9379147d2/FLAG279071a81 [2021-11-23 16:44:57,387 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:44:57,388 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c [2021-11-23 16:44:57,394 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/data/b19b20b4a/16bd8166a1b844948d1246d9379147d2/FLAG279071a81 [2021-11-23 16:44:57,758 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/data/b19b20b4a/16bd8166a1b844948d1246d9379147d2 [2021-11-23 16:44:57,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:44:57,767 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:44:57,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:44:57,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:44:57,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:44:57,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:44:57" (1/1) ... [2021-11-23 16:44:57,780 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@334c822f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:57, skipping insertion in model container [2021-11-23 16:44:57,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:44:57" (1/1) ... [2021-11-23 16:44:57,789 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:44:57,805 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:44:57,982 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_c692215b-c31c-4c4c-a3d8-b6b37fe98443/sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c[318,331] [2021-11-23 16:44:58,004 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:44:58,018 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:44:58,040 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_c692215b-c31c-4c4c-a3d8-b6b37fe98443/sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c[318,331] [2021-11-23 16:44:58,045 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:44:58,060 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:44:58,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:58 WrapperNode [2021-11-23 16:44:58,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:44:58,063 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:44:58,063 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:44:58,064 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:44:58,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:58" (1/1) ... [2021-11-23 16:44:58,083 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:58" (1/1) ... [2021-11-23 16:44:58,104 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2021-11-23 16:44:58,104 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:44:58,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:44:58,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:44:58,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:44:58,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:58" (1/1) ... [2021-11-23 16:44:58,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:58" (1/1) ... [2021-11-23 16:44:58,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:58" (1/1) ... [2021-11-23 16:44:58,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:58" (1/1) ... [2021-11-23 16:44:58,124 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:58" (1/1) ... [2021-11-23 16:44:58,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:58" (1/1) ... [2021-11-23 16:44:58,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:58" (1/1) ... [2021-11-23 16:44:58,143 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:44:58,144 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:44:58,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:44:58,145 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:44:58,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:58" (1/1) ... [2021-11-23 16:44:58,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:44:58,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:44:58,186 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:44:58,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:44:58,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:44:58,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:44:58,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:44:58,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 16:44:58,305 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:44:58,307 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:44:58,420 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:44:58,434 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 16:44:58,438 INFO L158 Benchmark]: Toolchain (without parser) took 670.72ms. Allocated memory is still 115.3MB. Free memory was 75.9MB in the beginning and 77.2MB in the end (delta: -1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:44:58,440 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 115.3MB. Free memory was 92.1MB in the beginning and 92.0MB in the end (delta: 69.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:44:58,441 INFO L158 Benchmark]: CACSL2BoogieTranslator took 289.84ms. Allocated memory is still 115.3MB. Free memory was 75.7MB in the beginning and 89.1MB in the end (delta: -13.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 16:44:58,442 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.70ms. Allocated memory is still 115.3MB. Free memory was 89.1MB in the beginning and 87.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 16:44:58,443 INFO L158 Benchmark]: Boogie Preprocessor took 37.67ms. Allocated memory is still 115.3MB. Free memory was 87.7MB in the beginning and 86.6MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:44:58,444 INFO L158 Benchmark]: RCFGBuilder took 292.09ms. Allocated memory is still 115.3MB. Free memory was 86.6MB in the beginning and 77.2MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 16:44:58,449 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 115.3MB. Free memory was 92.1MB in the beginning and 92.0MB in the end (delta: 69.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 289.84ms. Allocated memory is still 115.3MB. Free memory was 75.7MB in the beginning and 89.1MB in the end (delta: -13.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.70ms. Allocated memory is still 115.3MB. Free memory was 89.1MB in the beginning and 87.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.67ms. Allocated memory is still 115.3MB. Free memory was 87.7MB in the beginning and 86.6MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 292.09ms. Allocated memory is still 115.3MB. Free memory was 86.6MB in the beginning and 77.2MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 16:44:58,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/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/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl --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 32bit --witnessprinter.graph.data.programhash a0e1e4b700be1f29c3e51242b4a74b80feb10d65ba6788a48a42ab27b5c7017d --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:45:00,935 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:45:00,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:45:00,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:45:00,976 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:45:00,978 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:45:00,980 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:45:00,982 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:45:00,985 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:45:00,986 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:45:00,987 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:45:00,989 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:45:00,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:45:00,991 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:45:00,993 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:45:00,994 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:45:00,995 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:45:00,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:45:00,999 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:45:01,001 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:45:01,004 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:45:01,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:45:01,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:45:01,008 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:45:01,012 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:45:01,012 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:45:01,013 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:45:01,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:45:01,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:45:01,024 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:45:01,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:45:01,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:45:01,026 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:45:01,027 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:45:01,029 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:45:01,029 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:45:01,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:45:01,035 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:45:01,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:45:01,037 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:45:01,042 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:45:01,043 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 16:45:01,091 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:45:01,092 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:45:01,092 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:45:01,093 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:45:01,093 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:45:01,094 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:45:01,094 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:45:01,094 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:45:01,094 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:45:01,094 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:45:01,096 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:45:01,096 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:45:01,097 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:45:01,098 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:45:01,098 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:45:01,098 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:45:01,098 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:45:01,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:45:01,099 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:45:01,099 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:45:01,099 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:45:01,099 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:45:01,099 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:45:01,100 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:45:01,100 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:45:01,100 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:45:01,100 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:45:01,100 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:45:01,101 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:45:01,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:01,101 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:45:01,101 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:45:01,102 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:45:01,102 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:45:01,102 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:01,102 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:45:01,102 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:45:01,103 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:45:01,103 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_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0e1e4b700be1f29c3e51242b4a74b80feb10d65ba6788a48a42ab27b5c7017d [2021-11-23 16:45:01,511 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:45:01,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:45:01,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:45:01,546 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:45:01,547 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:45:01,549 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c [2021-11-23 16:45:01,622 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/data/1f14f86b5/f1bf4b90849741e7b879cba1ff8e83b8/FLAGea5909c78 [2021-11-23 16:45:02,095 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:45:02,097 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c [2021-11-23 16:45:02,122 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/data/1f14f86b5/f1bf4b90849741e7b879cba1ff8e83b8/FLAGea5909c78 [2021-11-23 16:45:02,507 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/data/1f14f86b5/f1bf4b90849741e7b879cba1ff8e83b8 [2021-11-23 16:45:02,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:45:02,514 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:45:02,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:02,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:45:02,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:45:02,522 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:02" (1/1) ... [2021-11-23 16:45:02,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1161f7f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:02, skipping insertion in model container [2021-11-23 16:45:02,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:02" (1/1) ... [2021-11-23 16:45:02,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:45:02,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:45:02,742 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_c692215b-c31c-4c4c-a3d8-b6b37fe98443/sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c[318,331] [2021-11-23 16:45:02,756 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:02,768 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:45:02,778 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_c692215b-c31c-4c4c-a3d8-b6b37fe98443/sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c[318,331] [2021-11-23 16:45:02,782 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:02,816 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:45:02,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:02 WrapperNode [2021-11-23 16:45:02,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:02,820 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:02,821 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:45:02,821 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:45:02,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:02" (1/1) ... [2021-11-23 16:45:02,847 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:02" (1/1) ... [2021-11-23 16:45:02,864 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2021-11-23 16:45:02,864 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:02,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:45:02,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:45:02,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:45:02,874 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:02" (1/1) ... [2021-11-23 16:45:02,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:02" (1/1) ... [2021-11-23 16:45:02,876 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:02" (1/1) ... [2021-11-23 16:45:02,876 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:02" (1/1) ... [2021-11-23 16:45:02,880 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:02" (1/1) ... [2021-11-23 16:45:02,884 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:02" (1/1) ... [2021-11-23 16:45:02,885 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:02" (1/1) ... [2021-11-23 16:45:02,887 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:45:02,888 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:45:02,889 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:45:02,889 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:45:02,889 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:02" (1/1) ... [2021-11-23 16:45:02,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:02,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:02,920 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:45:02,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:45:02,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:45:02,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:45:02,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:45:02,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 16:45:03,059 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:45:03,062 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:45:03,231 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:45:03,237 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:45:03,237 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 16:45:03,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:45:03 BoogieIcfgContainer [2021-11-23 16:45:03,246 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:45:03,248 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:45:03,248 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:45:03,251 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:45:03,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:45:02" (1/3) ... [2021-11-23 16:45:03,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41d7dea1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:45:03, skipping insertion in model container [2021-11-23 16:45:03,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:02" (2/3) ... [2021-11-23 16:45:03,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41d7dea1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:45:03, skipping insertion in model container [2021-11-23 16:45:03,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:45:03" (3/3) ... [2021-11-23 16:45:03,260 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_6.c [2021-11-23 16:45:03,265 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:45:03,266 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 16:45:03,332 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:45:03,343 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 16:45:03,343 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 16:45:03,365 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5) 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) [2021-11-23 16:45:03,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 16:45:03,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:03,373 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 16:45:03,374 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:03,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:03,381 INFO L85 PathProgramCache]: Analyzing trace with hash 889646744, now seen corresponding path program 1 times [2021-11-23 16:45:03,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:03,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050016750] [2021-11-23 16:45:03,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:03,396 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:03,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:03,399 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:03,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 16:45:03,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:03,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:45:03,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:03,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:03,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:03,626 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:03,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2050016750] [2021-11-23 16:45:03,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2050016750] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:03,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:03,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:45:03,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347945990] [2021-11-23 16:45:03,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:03,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:45:03,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:03,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:45:03,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:03,676 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5) 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) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:03,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:03,744 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2021-11-23 16:45:03,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:45:03,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-11-23 16:45:03,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:03,756 INFO L225 Difference]: With dead ends: 28 [2021-11-23 16:45:03,756 INFO L226 Difference]: Without dead ends: 12 [2021-11-23 16:45:03,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:03,764 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:03,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 22 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:45:03,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-23 16:45:03,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-23 16:45:03,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:03,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-11-23 16:45:03,805 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 6 [2021-11-23 16:45:03,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:03,806 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-11-23 16:45:03,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:03,807 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-11-23 16:45:03,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 16:45:03,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:03,808 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:03,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:04,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:04,026 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:04,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:04,027 INFO L85 PathProgramCache]: Analyzing trace with hash 295698875, now seen corresponding path program 1 times [2021-11-23 16:45:04,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:04,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1142786383] [2021-11-23 16:45:04,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:04,029 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:04,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:04,030 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:04,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 16:45:04,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:04,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:45:04,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:04,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:04,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:04,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:04,169 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:04,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1142786383] [2021-11-23 16:45:04,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1142786383] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:04,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [283481852] [2021-11-23 16:45:04,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:04,170 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:04,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:45:04,172 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:45:04,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-23 16:45:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:04,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:45:04,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:04,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:04,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:04,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:04,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [283481852] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:04,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258601051] [2021-11-23 16:45:04,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:04,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:45:04,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:04,382 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:45:04,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 16:45:04,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:04,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:45:04,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:04,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:04,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:04,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258601051] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:04,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:45:04,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-11-23 16:45:04,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444295315] [2021-11-23 16:45:04,530 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:45:04,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:45:04,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:04,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:45:04,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:45:04,533 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:04,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:04,618 INFO L93 Difference]: Finished difference Result 26 states and 35 transitions. [2021-11-23 16:45:04,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:45:04,619 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 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 8 [2021-11-23 16:45:04,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:04,620 INFO L225 Difference]: With dead ends: 26 [2021-11-23 16:45:04,620 INFO L226 Difference]: Without dead ends: 18 [2021-11-23 16:45:04,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:45:04,622 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:04,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 20 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:45:04,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-23 16:45:04,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2021-11-23 16:45:04,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 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) [2021-11-23 16:45:04,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-11-23 16:45:04,630 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2021-11-23 16:45:04,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:04,631 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-11-23 16:45:04,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:04,631 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-11-23 16:45:04,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 16:45:04,632 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:04,632 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:04,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:04,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:05,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:05,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:05,259 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:05,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:05,260 INFO L85 PathProgramCache]: Analyzing trace with hash 890916581, now seen corresponding path program 1 times [2021-11-23 16:45:05,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:05,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1822745246] [2021-11-23 16:45:05,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:05,261 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:05,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:05,273 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:05,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 16:45:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:05,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:45:05,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:05,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:05,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:05,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:05,443 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:05,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1822745246] [2021-11-23 16:45:05,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1822745246] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:05,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1274285006] [2021-11-23 16:45:05,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:05,444 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:05,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:45:05,446 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:45:05,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-23 16:45:05,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:05,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:45:05,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:05,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:05,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:05,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:05,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1274285006] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:05,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112954334] [2021-11-23 16:45:05,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:05,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:45:05,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:05,654 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:45:05,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 16:45:05,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:05,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:45:05,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:05,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:05,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:05,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:05,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112954334] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:05,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:45:05,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 6] total 12 [2021-11-23 16:45:05,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406158380] [2021-11-23 16:45:05,974 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:45:05,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 16:45:05,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:05,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 16:45:05,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-11-23 16:45:05,977 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:06,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:06,341 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2021-11-23 16:45:06,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 16:45:06,346 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 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 14 [2021-11-23 16:45:06,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:06,347 INFO L225 Difference]: With dead ends: 45 [2021-11-23 16:45:06,347 INFO L226 Difference]: Without dead ends: 35 [2021-11-23 16:45:06,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-11-23 16:45:06,349 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 27 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:06,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 27 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:45:06,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-23 16:45:06,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-11-23 16:45:06,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 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) [2021-11-23 16:45:06,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2021-11-23 16:45:06,363 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 14 [2021-11-23 16:45:06,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:06,364 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2021-11-23 16:45:06,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:06,364 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2021-11-23 16:45:06,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 16:45:06,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:06,366 INFO L514 BasicCegarLoop]: trace histogram [10, 6, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:06,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-23 16:45:06,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-23 16:45:06,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-11-23 16:45:06,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:06,990 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:06,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:06,991 INFO L85 PathProgramCache]: Analyzing trace with hash -167364980, now seen corresponding path program 1 times [2021-11-23 16:45:06,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:06,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [563913690] [2021-11-23 16:45:06,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:06,992 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:06,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:07,005 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:07,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 16:45:07,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:07,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:45:07,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 49 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 16:45:07,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:07,498 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 49 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 16:45:07,499 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:07,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [563913690] [2021-11-23 16:45:07,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [563913690] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:07,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1067255298] [2021-11-23 16:45:07,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:07,500 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:07,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:45:07,501 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:45:07,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-23 16:45:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:07,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:45:07,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:07,704 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 49 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 16:45:07,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:07,817 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 49 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 16:45:07,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1067255298] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:07,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194721101] [2021-11-23 16:45:07,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:07,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:45:07,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:07,822 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:45:07,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 16:45:07,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:07,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 16:45:07,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:08,005 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 35 proven. 74 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 16:45:08,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:08,191 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-23 16:45:08,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194721101] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:08,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:45:08,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 11, 5] total 21 [2021-11-23 16:45:08,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215214163] [2021-11-23 16:45:08,197 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:45:08,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 16:45:08,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:08,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 16:45:08,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2021-11-23 16:45:08,200 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:08,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:08,888 INFO L93 Difference]: Finished difference Result 80 states and 103 transitions. [2021-11-23 16:45:08,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 16:45:08,889 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 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 34 [2021-11-23 16:45:08,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:08,891 INFO L225 Difference]: With dead ends: 80 [2021-11-23 16:45:08,891 INFO L226 Difference]: Without dead ends: 59 [2021-11-23 16:45:08,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=288, Invalid=468, Unknown=0, NotChecked=0, Total=756 [2021-11-23 16:45:08,893 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:08,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 39 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 16:45:08,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-23 16:45:08,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-23 16:45:08,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 58 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) [2021-11-23 16:45:08,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-11-23 16:45:08,904 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 34 [2021-11-23 16:45:08,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:08,904 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-11-23 16:45:08,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:08,905 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-11-23 16:45:08,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-23 16:45:08,907 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:08,907 INFO L514 BasicCegarLoop]: trace histogram [21, 16, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:08,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:09,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:09,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:09,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:09,522 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:09,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:09,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1612226575, now seen corresponding path program 2 times [2021-11-23 16:45:09,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:09,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [903903620] [2021-11-23 16:45:09,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:45:09,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:09,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:09,528 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:09,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 16:45:09,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:45:09,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:45:09,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 16:45:09,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 153 proven. 272 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 16:45:09,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:10,981 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 153 proven. 272 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 16:45:10,981 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:10,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [903903620] [2021-11-23 16:45:10,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [903903620] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:10,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1897552165] [2021-11-23 16:45:10,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:45:10,982 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:10,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:45:10,982 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:45:10,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-23 16:45:11,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:45:11,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:45:11,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 16:45:11,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:11,257 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 153 proven. 272 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 16:45:11,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:11,465 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 153 proven. 272 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 16:45:11,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1897552165] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:11,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631790776] [2021-11-23 16:45:11,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:45:11,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:45:11,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:11,470 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:45:11,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 16:45:11,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:45:11,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:45:11,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-23 16:45:11,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:11,726 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 107 proven. 344 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 16:45:11,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 107 proven. 8 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2021-11-23 16:45:12,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631790776] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:12,178 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:45:12,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19, 19, 21, 6] total 42 [2021-11-23 16:45:12,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004641756] [2021-11-23 16:45:12,179 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:45:12,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-23 16:45:12,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:12,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-23 16:45:12,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=1203, Unknown=0, NotChecked=0, Total=1722 [2021-11-23 16:45:12,183 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 42 states, 42 states have (on average 2.5238095238095237) internal successors, (106), 42 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) [2021-11-23 16:45:16,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:16,123 INFO L93 Difference]: Finished difference Result 128 states and 165 transitions. [2021-11-23 16:45:16,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-23 16:45:16,124 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.5238095238095237) internal successors, (106), 42 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 58 [2021-11-23 16:45:16,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:16,126 INFO L225 Difference]: With dead ends: 128 [2021-11-23 16:45:16,126 INFO L226 Difference]: Without dead ends: 103 [2021-11-23 16:45:16,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1332, Invalid=2328, Unknown=0, NotChecked=0, Total=3660 [2021-11-23 16:45:16,129 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 90 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:16,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 73 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 16:45:16,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-23 16:45:16,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-11-23 16:45:16,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0980392156862746) internal successors, (112), 102 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:16,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 112 transitions. [2021-11-23 16:45:16,150 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 112 transitions. Word has length 58 [2021-11-23 16:45:16,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:16,151 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 112 transitions. [2021-11-23 16:45:16,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.5238095238095237) internal successors, (106), 42 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) [2021-11-23 16:45:16,152 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 112 transitions. [2021-11-23 16:45:16,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 16:45:16,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:16,159 INFO L514 BasicCegarLoop]: trace histogram [42, 36, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:16,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-23 16:45:16,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:16,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:16,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:45:16,771 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:16,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:16,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1665205900, now seen corresponding path program 3 times [2021-11-23 16:45:16,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:16,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312729168] [2021-11-23 16:45:16,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:45:16,772 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:16,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:16,773 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:16,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 16:45:16,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-23 16:45:16,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:45:16,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:45:16,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:17,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 292 proven. 18 refuted. 0 times theorem prover too weak. 1484 trivial. 0 not checked. [2021-11-23 16:45:17,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:17,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 290 proven. 18 refuted. 0 times theorem prover too weak. 1486 trivial. 0 not checked. [2021-11-23 16:45:17,600 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:17,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312729168] [2021-11-23 16:45:17,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312729168] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:17,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [256875700] [2021-11-23 16:45:17,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:45:17,601 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:17,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:45:17,606 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:45:17,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-23 16:45:17,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-23 16:45:17,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:45:17,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 16:45:17,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:18,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 292 proven. 18 refuted. 0 times theorem prover too weak. 1484 trivial. 0 not checked. [2021-11-23 16:45:18,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 290 proven. 18 refuted. 0 times theorem prover too weak. 1486 trivial. 0 not checked. [2021-11-23 16:45:18,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [256875700] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:18,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467646952] [2021-11-23 16:45:18,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:45:18,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:45:18,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:18,810 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:45:18,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 16:45:18,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-23 16:45:18,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:45:18,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 16:45:18,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 292 proven. 18 refuted. 0 times theorem prover too weak. 1484 trivial. 0 not checked. [2021-11-23 16:45:19,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:19,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 290 proven. 18 refuted. 0 times theorem prover too weak. 1486 trivial. 0 not checked. [2021-11-23 16:45:19,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467646952] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:19,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:45:19,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 9, 7, 9] total 22 [2021-11-23 16:45:19,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116339461] [2021-11-23 16:45:19,538 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:45:19,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 16:45:19,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:19,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 16:45:19,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-11-23 16:45:19,541 INFO L87 Difference]: Start difference. First operand 103 states and 112 transitions. Second operand has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 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) [2021-11-23 16:45:20,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:20,159 INFO L93 Difference]: Finished difference Result 152 states and 185 transitions. [2021-11-23 16:45:20,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 16:45:20,160 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 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 102 [2021-11-23 16:45:20,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:20,162 INFO L225 Difference]: With dead ends: 152 [2021-11-23 16:45:20,162 INFO L226 Difference]: Without dead ends: 123 [2021-11-23 16:45:20,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 590 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2021-11-23 16:45:20,164 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 84 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:20,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 56 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 16:45:20,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-23 16:45:20,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-11-23 16:45:20,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0573770491803278) internal successors, (129), 122 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:20,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 129 transitions. [2021-11-23 16:45:20,179 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 129 transitions. Word has length 102 [2021-11-23 16:45:20,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:20,180 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 129 transitions. [2021-11-23 16:45:20,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 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) [2021-11-23 16:45:20,181 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 129 transitions. [2021-11-23 16:45:20,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-23 16:45:20,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:20,183 INFO L514 BasicCegarLoop]: trace histogram [47, 36, 11, 11, 8, 3, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:20,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:20,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:20,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:20,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:20,795 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:20,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:20,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1734635863, now seen corresponding path program 4 times [2021-11-23 16:45:20,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:20,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [933793923] [2021-11-23 16:45:20,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 16:45:20,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:20,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:20,798 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:20,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 16:45:20,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 16:45:20,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:45:20,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 16:45:20,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:21,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2319 backedges. 777 proven. 1332 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-23 16:45:21,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2319 backedges. 777 proven. 1332 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-23 16:45:25,860 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:25,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [933793923] [2021-11-23 16:45:25,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [933793923] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:25,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [227863104] [2021-11-23 16:45:25,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 16:45:25,861 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:25,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:45:25,864 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:45:25,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-23 16:45:26,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 16:45:26,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:45:26,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 16:45:26,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2319 backedges. 777 proven. 1332 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-23 16:45:26,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:26,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2319 backedges. 777 proven. 1332 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-23 16:45:26,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [227863104] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:26,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664936863] [2021-11-23 16:45:26,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 16:45:26,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:45:26,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:26,679 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:45:26,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 16:45:26,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 16:45:26,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:45:26,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-23 16:45:26,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:27,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2319 backedges. 699 proven. 1484 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-23 16:45:27,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:37,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2319 backedges. 652 proven. 1569 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-23 16:45:37,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664936863] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:37,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:45:37,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39, 39, 41, 43] total 119 [2021-11-23 16:45:37,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869771198] [2021-11-23 16:45:37,548 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:45:37,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-11-23 16:45:37,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:37,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-11-23 16:45:37,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4759, Invalid=9283, Unknown=0, NotChecked=0, Total=14042 [2021-11-23 16:45:37,559 INFO L87 Difference]: Start difference. First operand 123 states and 129 transitions. Second operand has 119 states, 119 states have (on average 2.1596638655462184) internal successors, (257), 119 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:10,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:10,285 INFO L93 Difference]: Finished difference Result 406 states and 496 transitions. [2021-11-23 16:47:10,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-11-23 16:47:10,288 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.1596638655462184) internal successors, (257), 119 states have internal predecessors, (257), 0 states have call successors, (0), 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 122 [2021-11-23 16:47:10,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:10,291 INFO L225 Difference]: With dead ends: 406 [2021-11-23 16:47:10,291 INFO L226 Difference]: Without dead ends: 359 [2021-11-23 16:47:10,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 803 GetRequests, 609 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4912 ImplicationChecksByTransitivity, 102.9s TimeCoverageRelationStatistics Valid=13994, Invalid=24226, Unknown=0, NotChecked=0, Total=38220 [2021-11-23 16:47:10,303 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 1759 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 3460 mSolverCounterSat, 1126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1759 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 4586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1126 IncrementalHoareTripleChecker+Valid, 3460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:10,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1759 Valid, 197 Invalid, 4586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1126 Valid, 3460 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-23 16:47:10,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-11-23 16:47:10,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 351. [2021-11-23 16:47:10,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 1.02) internal successors, (357), 350 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:10,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 357 transitions. [2021-11-23 16:47:10,359 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 357 transitions. Word has length 122 [2021-11-23 16:47:10,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:10,360 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 357 transitions. [2021-11-23 16:47:10,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.1596638655462184) internal successors, (257), 119 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:10,361 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 357 transitions. [2021-11-23 16:47:10,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2021-11-23 16:47:10,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:10,378 INFO L514 BasicCegarLoop]: trace histogram [124, 76, 48, 48, 40, 8, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:10,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-23 16:47:10,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-23 16:47:10,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:10,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:10,980 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:47:10,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:10,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1612605668, now seen corresponding path program 5 times [2021-11-23 16:47:10,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:10,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1987766022] [2021-11-23 16:47:10,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 16:47:10,982 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:10,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:10,983 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:10,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 16:47:11,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 110 check-sat command(s) [2021-11-23 16:47:11,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:47:11,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-23 16:47:11,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:21,161 INFO L134 CoverageAnalysis]: Checked inductivity of 17632 backedges. 8594 proven. 3240 refuted. 0 times theorem prover too weak. 5798 trivial. 0 not checked. [2021-11-23 16:47:21,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:31,694 INFO L134 CoverageAnalysis]: Checked inductivity of 17632 backedges. 8594 proven. 3240 refuted. 0 times theorem prover too weak. 5798 trivial. 0 not checked. [2021-11-23 16:47:31,694 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:31,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1987766022] [2021-11-23 16:47:31,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1987766022] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:31,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1205406375] [2021-11-23 16:47:31,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 16:47:31,695 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:47:31,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:47:31,723 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:47:31,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-23 16:47:32,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 110 check-sat command(s) [2021-11-23 16:47:32,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:47:32,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-23 16:47:32,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:34,365 INFO L134 CoverageAnalysis]: Checked inductivity of 17632 backedges. 8594 proven. 3240 refuted. 0 times theorem prover too weak. 5798 trivial. 0 not checked. [2021-11-23 16:47:34,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:48,650 INFO L134 CoverageAnalysis]: Checked inductivity of 17632 backedges. 8594 proven. 3240 refuted. 0 times theorem prover too weak. 5798 trivial. 0 not checked. [2021-11-23 16:47:48,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1205406375] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:48,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426010634] [2021-11-23 16:47:48,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 16:47:48,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:47:48,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:47:48,657 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:47:48,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-23 16:47:49,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 110 check-sat command(s) [2021-11-23 16:47:49,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:47:49,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-23 16:47:49,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 17632 backedges. 8594 proven. 3240 refuted. 0 times theorem prover too weak. 5798 trivial. 0 not checked. [2021-11-23 16:47:51,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:48:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 17632 backedges. 8594 proven. 3240 refuted. 0 times theorem prover too weak. 5798 trivial. 0 not checked. [2021-11-23 16:48:09,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426010634] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:48:09,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:48:09,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44, 44, 44, 44] total 167 [2021-11-23 16:48:09,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142244138] [2021-11-23 16:48:09,063 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:48:09,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2021-11-23 16:48:09,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:09,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2021-11-23 16:48:09,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8082, Invalid=19640, Unknown=0, NotChecked=0, Total=27722 [2021-11-23 16:48:09,071 INFO L87 Difference]: Start difference. First operand 351 states and 357 transitions. Second operand has 167 states, 167 states have (on average 3.9520958083832336) internal successors, (660), 167 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:38,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:38,588 INFO L93 Difference]: Finished difference Result 869 states and 922 transitions. [2021-11-23 16:49:38,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-11-23 16:49:38,589 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 3.9520958083832336) internal successors, (660), 167 states have internal predecessors, (660), 0 states have call successors, (0), 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 350 [2021-11-23 16:49:38,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:38,594 INFO L225 Difference]: With dead ends: 869 [2021-11-23 16:49:38,594 INFO L226 Difference]: Without dead ends: 675 [2021-11-23 16:49:38,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2176 GetRequests, 1970 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5527 ImplicationChecksByTransitivity, 127.3s TimeCoverageRelationStatistics Valid=13251, Invalid=29805, Unknown=0, NotChecked=0, Total=43056 [2021-11-23 16:49:38,601 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 475 mSDsluCounter, 1858 mSDsCounter, 0 mSdLazyCounter, 5626 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 1903 SdHoareTripleChecker+Invalid, 5872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 5626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:38,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 1903 Invalid, 5872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 5626 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2021-11-23 16:49:38,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-11-23 16:49:38,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 519. [2021-11-23 16:49:38,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 1.0135135135135136) internal successors, (525), 518 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:38,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 525 transitions. [2021-11-23 16:49:38,647 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 525 transitions. Word has length 350 [2021-11-23 16:49:38,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:38,648 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 525 transitions. [2021-11-23 16:49:38,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 167 states have (on average 3.9520958083832336) internal successors, (660), 167 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:38,649 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 525 transitions. [2021-11-23 16:49:38,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2021-11-23 16:49:38,660 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:38,660 INFO L514 BasicCegarLoop]: trace histogram [166, 90, 90, 82, 76, 8, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:38,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:38,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:39,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:39,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:49:39,265 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:49:39,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:39,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1660292886, now seen corresponding path program 6 times [2021-11-23 16:49:39,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:39,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1786914368] [2021-11-23 16:49:39,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 16:49:39,267 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:39,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:39,269 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:39,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 16:49:39,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2021-11-23 16:49:39,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:49:39,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 16:49:39,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:40,873 INFO L134 CoverageAnalysis]: Checked inductivity of 35566 backedges. 4071 proven. 128 refuted. 0 times theorem prover too weak. 31367 trivial. 0 not checked. [2021-11-23 16:49:40,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 35566 backedges. 4071 proven. 128 refuted. 0 times theorem prover too weak. 31367 trivial. 0 not checked. [2021-11-23 16:49:42,084 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:42,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1786914368] [2021-11-23 16:49:42,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1786914368] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:49:42,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [864379263] [2021-11-23 16:49:42,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 16:49:42,085 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:49:42,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:49:42,086 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:49:42,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-23 16:49:42,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2021-11-23 16:49:42,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:49:42,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 16:49:42,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 35566 backedges. 4071 proven. 128 refuted. 0 times theorem prover too weak. 31367 trivial. 0 not checked. [2021-11-23 16:49:44,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:45,942 INFO L134 CoverageAnalysis]: Checked inductivity of 35566 backedges. 4071 proven. 128 refuted. 0 times theorem prover too weak. 31367 trivial. 0 not checked. [2021-11-23 16:49:45,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [864379263] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:49:45,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919765871] [2021-11-23 16:49:45,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 16:49:45,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:49:45,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:49:45,943 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:49:45,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-23 16:49:46,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2021-11-23 16:49:46,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:49:46,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 16:49:46,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:47,226 INFO L134 CoverageAnalysis]: Checked inductivity of 35566 backedges. 4152 proven. 128 refuted. 0 times theorem prover too weak. 31286 trivial. 0 not checked. [2021-11-23 16:49:47,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 35566 backedges. 4071 proven. 128 refuted. 0 times theorem prover too weak. 31367 trivial. 0 not checked. [2021-11-23 16:49:48,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919765871] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:49:48,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:49:48,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 14, 12, 14] total 44 [2021-11-23 16:49:48,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463355145] [2021-11-23 16:49:48,013 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:49:48,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-23 16:49:48,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:48,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-23 16:49:48,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=553, Invalid=1339, Unknown=0, NotChecked=0, Total=1892 [2021-11-23 16:49:48,017 INFO L87 Difference]: Start difference. First operand 519 states and 525 transitions. Second operand has 44 states, 44 states have (on average 3.5) internal successors, (154), 44 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:51,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:51,226 INFO L93 Difference]: Finished difference Result 761 states and 792 transitions. [2021-11-23 16:49:51,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 16:49:51,234 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.5) internal successors, (154), 44 states have internal predecessors, (154), 0 states have call successors, (0), 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 518 [2021-11-23 16:49:51,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:51,238 INFO L225 Difference]: With dead ends: 761 [2021-11-23 16:49:51,238 INFO L226 Difference]: Without dead ends: 563 [2021-11-23 16:49:51,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3122 GetRequests, 3069 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=960, Invalid=2010, Unknown=0, NotChecked=0, Total=2970 [2021-11-23 16:49:51,240 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 199 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:51,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 194 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 16:49:51,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-11-23 16:49:51,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 559. [2021-11-23 16:49:51,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 1.021505376344086) internal successors, (570), 558 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:51,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 570 transitions. [2021-11-23 16:49:51,298 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 570 transitions. Word has length 518 [2021-11-23 16:49:51,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:51,300 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 570 transitions. [2021-11-23 16:49:51,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.5) internal successors, (154), 44 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:49:51,300 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 570 transitions. [2021-11-23 16:49:51,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2021-11-23 16:49:51,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:51,315 INFO L514 BasicCegarLoop]: trace histogram [176, 100, 100, 82, 76, 18, 1, 1, 1, 1, 1, 1] [2021-11-23 16:49:51,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:51,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:51,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:51,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:49:51,929 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:49:51,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:51,930 INFO L85 PathProgramCache]: Analyzing trace with hash -681351844, now seen corresponding path program 7 times [2021-11-23 16:49:51,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:51,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1405948250] [2021-11-23 16:49:51,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 16:49:51,931 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:51,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:51,932 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:51,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-23 16:49:52,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:52,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-23 16:49:52,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:55,551 INFO L134 CoverageAnalysis]: Checked inductivity of 40876 backedges. 15323 proven. 5852 refuted. 0 times theorem prover too weak. 19701 trivial. 0 not checked. [2021-11-23 16:49:55,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:11,791 INFO L134 CoverageAnalysis]: Checked inductivity of 40876 backedges. 15323 proven. 5852 refuted. 0 times theorem prover too weak. 19701 trivial. 0 not checked. [2021-11-23 16:50:11,791 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:11,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1405948250] [2021-11-23 16:50:11,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1405948250] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:11,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [485902203] [2021-11-23 16:50:11,792 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 16:50:11,792 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:50:11,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:50:11,792 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:50:11,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-23 16:50:12,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:12,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-23 16:50:12,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:13,441 INFO L134 CoverageAnalysis]: Checked inductivity of 40876 backedges. 15323 proven. 5852 refuted. 0 times theorem prover too weak. 19701 trivial. 0 not checked. [2021-11-23 16:50:13,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:14,447 INFO L134 CoverageAnalysis]: Checked inductivity of 40876 backedges. 15323 proven. 5852 refuted. 0 times theorem prover too weak. 19701 trivial. 0 not checked. [2021-11-23 16:50:14,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [485902203] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:14,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412167197] [2021-11-23 16:50:14,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 16:50:14,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:50:14,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:50:14,449 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:50:14,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-23 16:50:14,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:14,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-23 16:50:14,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:15,533 INFO L134 CoverageAnalysis]: Checked inductivity of 40876 backedges. 15323 proven. 5852 refuted. 0 times theorem prover too weak. 19701 trivial. 0 not checked. [2021-11-23 16:50:15,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:42,187 INFO L134 CoverageAnalysis]: Checked inductivity of 40876 backedges. 15323 proven. 5852 refuted. 0 times theorem prover too weak. 19701 trivial. 0 not checked. [2021-11-23 16:50:42,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412167197] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:42,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:50:42,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79, 79, 79, 79, 80] total 233 [2021-11-23 16:50:42,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853868510] [2021-11-23 16:50:42,190 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:50:42,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 233 states [2021-11-23 16:50:42,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:42,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 233 interpolants. [2021-11-23 16:50:42,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15324, Invalid=38732, Unknown=0, NotChecked=0, Total=54056 [2021-11-23 16:50:42,200 INFO L87 Difference]: Start difference. First operand 559 states and 570 transitions. Second operand has 233 states, 233 states have (on average 2.0343347639484977) internal successors, (474), 233 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:57:08,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:57:08,999 INFO L93 Difference]: Finished difference Result 1118 states and 1217 transitions. [2021-11-23 16:57:09,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2021-11-23 16:57:09,000 INFO L78 Accepts]: Start accepts. Automaton has has 233 states, 233 states have (on average 2.0343347639484977) internal successors, (474), 233 states have internal predecessors, (474), 0 states have call successors, (0), 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 558 [2021-11-23 16:57:09,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:57:09,005 INFO L225 Difference]: With dead ends: 1118 [2021-11-23 16:57:09,005 INFO L226 Difference]: Without dead ends: 715 [2021-11-23 16:57:09,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3419 GetRequests, 3111 SyntacticMatches, 0 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5853 ImplicationChecksByTransitivity, 424.6s TimeCoverageRelationStatistics Valid=30340, Invalid=65450, Unknown=0, NotChecked=0, Total=95790 [2021-11-23 16:57:09,014 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 385 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 12572 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 12804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 12572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-23 16:57:09,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 329 Invalid, 12804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 12572 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-23 16:57:09,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-11-23 16:57:09,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 715. [2021-11-23 16:57:09,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 1.0168067226890756) internal successors, (726), 714 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:57:09,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 726 transitions. [2021-11-23 16:57:09,077 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 726 transitions. Word has length 558 [2021-11-23 16:57:09,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:57:09,078 INFO L470 AbstractCegarLoop]: Abstraction has 715 states and 726 transitions. [2021-11-23 16:57:09,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 233 states, 233 states have (on average 2.0343347639484977) internal successors, (474), 233 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:57:09,079 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 726 transitions. [2021-11-23 16:57:09,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 715 [2021-11-23 16:57:09,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:57:09,106 INFO L514 BasicCegarLoop]: trace histogram [254, 154, 100, 100, 82, 18, 1, 1, 1, 1, 1, 1] [2021-11-23 16:57:09,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-23 16:57:09,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-23 16:57:09,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-23 16:57:09,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:57:09,713 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:57:09,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:57:09,714 INFO L85 PathProgramCache]: Analyzing trace with hash 339617734, now seen corresponding path program 8 times [2021-11-23 16:57:09,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:57:09,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1949263612] [2021-11-23 16:57:09,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:57:09,715 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:57:09,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:57:09,716 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:57:09,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c692215b-c31c-4c4c-a3d8-b6b37fe98443/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-23 16:57:10,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:57:10,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:57:10,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 156 conjunts are in the unsatisfiable core [2021-11-23 16:57:10,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:57:24,190 INFO L134 CoverageAnalysis]: Checked inductivity of 74416 backedges. 30845 proven. 23870 refuted. 0 times theorem prover too weak. 19701 trivial. 0 not checked. [2021-11-23 16:57:24,190 INFO L328 TraceCheckSpWp]: Computing backward predicates...