./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem18_label22.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_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/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_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem18_label22.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/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_399e9f78-3bdf-4b6a-b915-bd8381407502/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 8328e3b00fffe34fe4036e6200cb72104f847b0ee3df41fd01aea5e06a24af7e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:59:30,062 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:59:30,064 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:59:30,104 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:59:30,104 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:59:30,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:59:30,108 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:59:30,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:59:30,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:59:30,115 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:59:30,116 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:59:30,118 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:59:30,119 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:59:30,120 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:59:30,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:59:30,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:59:30,126 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:59:30,127 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:59:30,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:59:30,133 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:59:30,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:59:30,144 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:59:30,146 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:59:30,147 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:59:30,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:59:30,151 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:59:30,152 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:59:30,153 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:59:30,153 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:59:30,155 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:59:30,155 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:59:30,156 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:59:30,157 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:59:30,158 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:59:30,160 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:59:30,160 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:59:30,161 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:59:30,161 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:59:30,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:59:30,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:59:30,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:59:30,164 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 16:59:30,192 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:59:30,193 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:59:30,193 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:59:30,193 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:59:30,194 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:59:30,194 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:59:30,194 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:59:30,195 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:59:30,195 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:59:30,195 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:59:30,195 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:59:30,195 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:59:30,196 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:59:30,196 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:59:30,196 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:59:30,196 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:59:30,197 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:59:30,197 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:59:30,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:59:30,198 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:59:30,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:59:30,198 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:59:30,198 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:59:30,199 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:59:30,199 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:59:30,199 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:59:30,199 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:59:30,199 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:59:30,200 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:59:30,200 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:59:30,200 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:59:30,200 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:59:30,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:59:30,201 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:59:30,201 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:59:30,201 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:59:30,201 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:59:30,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:59:30,202 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:59:30,202 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:59:30,202 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:59:30,202 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_399e9f78-3bdf-4b6a-b915-bd8381407502/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8328e3b00fffe34fe4036e6200cb72104f847b0ee3df41fd01aea5e06a24af7e [2021-11-23 16:59:30,480 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:59:30,504 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:59:30,519 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:59:30,520 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:59:30,521 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:59:30,523 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem18_label22.c [2021-11-23 16:59:30,609 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/data/461447d52/e03d9f571de34bd9b790237855760648/FLAG2720de09e [2021-11-23 16:59:31,462 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:59:31,464 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/sv-benchmarks/c/eca-rers2012/Problem18_label22.c [2021-11-23 16:59:31,505 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/data/461447d52/e03d9f571de34bd9b790237855760648/FLAG2720de09e [2021-11-23 16:59:31,990 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/data/461447d52/e03d9f571de34bd9b790237855760648 [2021-11-23 16:59:31,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:59:31,994 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:59:31,996 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:59:31,996 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:59:32,000 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:59:32,001 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:59:31" (1/1) ... [2021-11-23 16:59:32,003 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3839f254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:32, skipping insertion in model container [2021-11-23 16:59:32,003 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:59:31" (1/1) ... [2021-11-23 16:59:32,012 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:59:32,166 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:59:32,471 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_399e9f78-3bdf-4b6a-b915-bd8381407502/sv-benchmarks/c/eca-rers2012/Problem18_label22.c[4444,4457] [2021-11-23 16:59:33,400 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:59:33,434 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:59:33,471 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_399e9f78-3bdf-4b6a-b915-bd8381407502/sv-benchmarks/c/eca-rers2012/Problem18_label22.c[4444,4457] [2021-11-23 16:59:33,918 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:59:33,942 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:59:33,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:33 WrapperNode [2021-11-23 16:59:33,943 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:59:33,944 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:59:33,944 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:59:33,944 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:59:33,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:33" (1/1) ... [2021-11-23 16:59:34,015 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:33" (1/1) ... [2021-11-23 16:59:34,271 INFO L137 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 4132 [2021-11-23 16:59:34,271 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:59:34,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:59:34,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:59:34,273 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:59:34,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:33" (1/1) ... [2021-11-23 16:59:34,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:33" (1/1) ... [2021-11-23 16:59:34,327 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:33" (1/1) ... [2021-11-23 16:59:34,328 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:33" (1/1) ... [2021-11-23 16:59:34,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:33" (1/1) ... [2021-11-23 16:59:34,484 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:33" (1/1) ... [2021-11-23 16:59:34,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:33" (1/1) ... [2021-11-23 16:59:34,533 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:59:34,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:59:34,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:59:34,535 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:59:34,536 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:33" (1/1) ... [2021-11-23 16:59:34,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:59:34,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:59:34,576 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:59:34,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:59:34,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:59:34,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 16:59:34,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:59:34,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:59:34,788 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:59:34,790 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:59:38,634 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:59:38,676 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 16:59:38,681 INFO L158 Benchmark]: Toolchain (without parser) took 6685.31ms. Allocated memory was 107.0MB in the beginning and 396.4MB in the end (delta: 289.4MB). Free memory was 62.1MB in the beginning and 265.4MB in the end (delta: -203.4MB). Peak memory consumption was 114.1MB. Max. memory is 16.1GB. [2021-11-23 16:59:38,682 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 107.0MB. Free memory was 78.3MB in the beginning and 78.3MB in the end (delta: 29.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:59:38,683 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1946.84ms. Allocated memory was 107.0MB in the beginning and 142.6MB in the end (delta: 35.7MB). Free memory was 61.8MB in the beginning and 94.6MB in the end (delta: -32.8MB). Peak memory consumption was 52.4MB. Max. memory is 16.1GB. [2021-11-23 16:59:38,684 INFO L158 Benchmark]: Boogie Procedure Inliner took 327.81ms. Allocated memory is still 142.6MB. Free memory was 94.6MB in the beginning and 77.2MB in the end (delta: 17.4MB). Peak memory consumption was 63.8MB. Max. memory is 16.1GB. [2021-11-23 16:59:38,685 INFO L158 Benchmark]: Boogie Preprocessor took 260.94ms. Allocated memory is still 142.6MB. Free memory was 77.2MB in the beginning and 53.6MB in the end (delta: 23.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-11-23 16:59:38,686 INFO L158 Benchmark]: RCFGBuilder took 4144.61ms. Allocated memory was 142.6MB in the beginning and 396.4MB in the end (delta: 253.8MB). Free memory was 53.6MB in the beginning and 265.4MB in the end (delta: -211.9MB). Peak memory consumption was 71.2MB. Max. memory is 16.1GB. [2021-11-23 16:59:38,690 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 107.0MB. Free memory was 78.3MB in the beginning and 78.3MB in the end (delta: 29.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1946.84ms. Allocated memory was 107.0MB in the beginning and 142.6MB in the end (delta: 35.7MB). Free memory was 61.8MB in the beginning and 94.6MB in the end (delta: -32.8MB). Peak memory consumption was 52.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 327.81ms. Allocated memory is still 142.6MB. Free memory was 94.6MB in the beginning and 77.2MB in the end (delta: 17.4MB). Peak memory consumption was 63.8MB. Max. memory is 16.1GB. * Boogie Preprocessor took 260.94ms. Allocated memory is still 142.6MB. Free memory was 77.2MB in the beginning and 53.6MB in the end (delta: 23.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * RCFGBuilder took 4144.61ms. Allocated memory was 142.6MB in the beginning and 396.4MB in the end (delta: 253.8MB). Free memory was 53.6MB in the beginning and 265.4MB in the end (delta: -211.9MB). Peak memory consumption was 71.2MB. 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 16:59:38,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/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_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/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_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem18_label22.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/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_399e9f78-3bdf-4b6a-b915-bd8381407502/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 8328e3b00fffe34fe4036e6200cb72104f847b0ee3df41fd01aea5e06a24af7e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:59:41,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:59:41,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:59:41,510 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:59:41,511 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:59:41,516 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:59:41,519 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:59:41,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:59:41,529 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:59:41,541 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:59:41,543 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:59:41,545 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:59:41,546 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:59:41,550 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:59:41,553 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:59:41,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:59:41,561 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:59:41,562 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:59:41,565 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:59:41,573 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:59:41,576 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:59:41,578 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:59:41,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:59:41,584 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:59:41,591 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:59:41,591 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:59:41,592 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:59:41,594 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:59:41,595 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:59:41,597 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:59:41,597 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:59:41,598 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:59:41,601 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:59:41,602 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:59:41,605 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:59:41,605 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:59:41,606 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:59:41,607 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:59:41,607 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:59:41,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:59:41,610 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:59:41,617 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 16:59:41,672 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:59:41,673 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:59:41,674 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:59:41,674 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:59:41,675 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:59:41,676 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:59:41,676 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:59:41,676 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:59:41,677 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:59:41,677 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:59:41,678 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:59:41,678 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:59:41,680 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:59:41,681 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:59:41,681 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:59:41,681 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:59:41,681 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:59:41,682 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:59:41,682 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:59:41,682 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:59:41,683 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:59:41,683 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:59:41,683 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:59:41,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:59:41,684 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:59:41,684 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:59:41,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:59:41,684 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:59:41,685 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:59:41,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:59:41,685 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:59:41,686 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:59:41,686 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:59:41,686 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:59:41,687 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:59:41,687 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:59:41,687 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:59:41,688 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:59:41,688 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_399e9f78-3bdf-4b6a-b915-bd8381407502/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8328e3b00fffe34fe4036e6200cb72104f847b0ee3df41fd01aea5e06a24af7e [2021-11-23 16:59:42,209 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:59:42,238 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:59:42,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:59:42,243 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:59:42,244 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:59:42,246 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem18_label22.c [2021-11-23 16:59:42,327 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/data/522df433f/73713184065a46198d2ed31c16a92835/FLAG177b74e03 [2021-11-23 16:59:43,354 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:59:43,354 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/sv-benchmarks/c/eca-rers2012/Problem18_label22.c [2021-11-23 16:59:43,386 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/data/522df433f/73713184065a46198d2ed31c16a92835/FLAG177b74e03 [2021-11-23 16:59:43,795 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/data/522df433f/73713184065a46198d2ed31c16a92835 [2021-11-23 16:59:43,798 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:59:43,800 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:59:43,802 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:59:43,802 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:59:43,806 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:59:43,808 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:59:43" (1/1) ... [2021-11-23 16:59:43,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72da1873 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:43, skipping insertion in model container [2021-11-23 16:59:43,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:59:43" (1/1) ... [2021-11-23 16:59:43,819 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:59:43,963 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:59:44,284 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_399e9f78-3bdf-4b6a-b915-bd8381407502/sv-benchmarks/c/eca-rers2012/Problem18_label22.c[4444,4457] [2021-11-23 16:59:45,444 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:59:45,458 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:59:45,497 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_399e9f78-3bdf-4b6a-b915-bd8381407502/sv-benchmarks/c/eca-rers2012/Problem18_label22.c[4444,4457] [2021-11-23 16:59:46,052 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:59:46,077 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:59:46,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:46 WrapperNode [2021-11-23 16:59:46,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:59:46,079 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:59:46,079 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:59:46,079 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:59:46,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:46" (1/1) ... [2021-11-23 16:59:46,165 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:46" (1/1) ... [2021-11-23 16:59:46,346 INFO L137 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 4128 [2021-11-23 16:59:46,347 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:59:46,348 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:59:46,349 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:59:46,349 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:59:46,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:46" (1/1) ... [2021-11-23 16:59:46,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:46" (1/1) ... [2021-11-23 16:59:46,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:46" (1/1) ... [2021-11-23 16:59:46,378 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:46" (1/1) ... [2021-11-23 16:59:46,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:46" (1/1) ... [2021-11-23 16:59:46,576 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:46" (1/1) ... [2021-11-23 16:59:46,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:46" (1/1) ... [2021-11-23 16:59:46,663 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:59:46,664 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:59:46,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:59:46,665 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:59:46,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:46" (1/1) ... [2021-11-23 16:59:46,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:59:46,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:59:46,751 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:59:46,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:59:46,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:59:46,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 16:59:46,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:59:46,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:59:46,961 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:59:46,963 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:00:03,654 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:00:03,676 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:00:03,676 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:00:03,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:00:03 BoogieIcfgContainer [2021-11-23 17:00:03,680 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:00:03,683 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:00:03,683 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:00:03,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:00:03,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:59:43" (1/3) ... [2021-11-23 17:00:03,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4635e950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:00:03, skipping insertion in model container [2021-11-23 17:00:03,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:46" (2/3) ... [2021-11-23 17:00:03,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4635e950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:00:03, skipping insertion in model container [2021-11-23 17:00:03,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:00:03" (3/3) ... [2021-11-23 17:00:03,690 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem18_label22.c [2021-11-23 17:00:03,697 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:00:03,697 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:00:03,765 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:00:03,774 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 17:00:03,774 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:00:03,847 INFO L276 IsEmpty]: Start isEmpty. Operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 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 17:00:03,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 17:00:03,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:03,856 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:00:03,856 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:00:03,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:03,863 INFO L85 PathProgramCache]: Analyzing trace with hash 751578873, now seen corresponding path program 1 times [2021-11-23 17:00:03,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:03,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1777621326] [2021-11-23 17:00:03,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:03,915 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:03,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:03,925 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:03,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:00:04,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:04,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:00:04,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:04,378 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 17:00:04,378 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:00:04,379 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:00:04,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1777621326] [2021-11-23 17:00:04,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1777621326] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:00:04,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:00:04,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:00:04,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359195997] [2021-11-23 17:00:04,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:00:04,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:00:04,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:00:04,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:00:04,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:00:04,422 INFO L87 Difference]: Start difference. First operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 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 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 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 17:00:27,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:00:27,326 INFO L93 Difference]: Finished difference Result 2205 states and 4266 transitions. [2021-11-23 17:00:27,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:00:27,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-11-23 17:00:27,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:00:27,362 INFO L225 Difference]: With dead ends: 2205 [2021-11-23 17:00:27,363 INFO L226 Difference]: Without dead ends: 1384 [2021-11-23 17:00:27,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 39 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 17:00:27,373 INFO L933 BasicCegarLoop]: 523 mSDtfsCounter, 675 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 2742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:00:27,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [675 Valid, 532 Invalid, 2742 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [577 Valid, 2165 Invalid, 0 Unknown, 0 Unchecked, 22.7s Time] [2021-11-23 17:00:27,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2021-11-23 17:00:27,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1384. [2021-11-23 17:00:27,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 1.5777295733911787) internal successors, (2182), 1383 states have internal predecessors, (2182), 0 states have call successors, (0), 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 17:00:27,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2182 transitions. [2021-11-23 17:00:27,506 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2182 transitions. Word has length 41 [2021-11-23 17:00:27,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:00:27,507 INFO L470 AbstractCegarLoop]: Abstraction has 1384 states and 2182 transitions. [2021-11-23 17:00:27,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 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 17:00:27,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2182 transitions. [2021-11-23 17:00:27,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-23 17:00:27,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:27,513 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:00:27,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:27,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:00:27,725 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:00:27,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:27,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1697351665, now seen corresponding path program 1 times [2021-11-23 17:00:27,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:27,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811579750] [2021-11-23 17:00:27,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:27,729 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:27,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:27,730 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:27,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:00:27,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:27,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:00:27,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:28,293 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:28,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:00:28,294 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:00:28,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811579750] [2021-11-23 17:00:28,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811579750] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:00:28,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:00:28,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:00:28,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537747415] [2021-11-23 17:00:28,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:00:28,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:00:28,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:00:28,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:00:28,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:00:28,298 INFO L87 Difference]: Start difference. First operand 1384 states and 2182 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 0 states have call successors, (0), 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 17:00:49,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:00:49,443 INFO L93 Difference]: Finished difference Result 4146 states and 6541 transitions. [2021-11-23 17:00:49,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:00:49,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 0 states have call successors, (0), 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 107 [2021-11-23 17:00:49,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:00:49,470 INFO L225 Difference]: With dead ends: 4146 [2021-11-23 17:00:49,470 INFO L226 Difference]: Without dead ends: 2764 [2021-11-23 17:00:49,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 105 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 17:00:49,475 INFO L933 BasicCegarLoop]: 524 mSDtfsCounter, 713 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 918 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 2619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 918 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:00:49,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [713 Valid, 529 Invalid, 2619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [918 Valid, 1701 Invalid, 0 Unknown, 0 Unchecked, 21.0s Time] [2021-11-23 17:00:49,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2021-11-23 17:00:49,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 2764. [2021-11-23 17:00:49,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2764 states, 2763 states have (on average 1.3481722765110387) internal successors, (3725), 2763 states have internal predecessors, (3725), 0 states have call successors, (0), 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 17:00:49,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 3725 transitions. [2021-11-23 17:00:49,572 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 3725 transitions. Word has length 107 [2021-11-23 17:00:49,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:00:49,574 INFO L470 AbstractCegarLoop]: Abstraction has 2764 states and 3725 transitions. [2021-11-23 17:00:49,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 0 states have call successors, (0), 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 17:00:49,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 3725 transitions. [2021-11-23 17:00:49,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-23 17:00:49,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:49,581 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:00:49,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:49,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:00:49,789 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:00:49,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:49,790 INFO L85 PathProgramCache]: Analyzing trace with hash -502398399, now seen corresponding path program 1 times [2021-11-23 17:00:49,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:49,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [328202590] [2021-11-23 17:00:49,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:49,792 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:49,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:49,793 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:49,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:00:49,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:49,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:00:49,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:50,383 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:50,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:00:50,385 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:00:50,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [328202590] [2021-11-23 17:00:50,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [328202590] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:00:50,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:00:50,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:00:50,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47552686] [2021-11-23 17:00:50,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:00:50,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:00:50,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:00:50,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:00:50,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:00:50,389 INFO L87 Difference]: Start difference. First operand 2764 states and 3725 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 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 17:01:07,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:07,380 INFO L93 Difference]: Finished difference Result 6908 states and 8992 transitions. [2021-11-23 17:01:07,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:01:07,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 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 127 [2021-11-23 17:01:07,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:07,412 INFO L225 Difference]: With dead ends: 6908 [2021-11-23 17:01:07,413 INFO L226 Difference]: Without dead ends: 4146 [2021-11-23 17:01:07,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 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 17:01:07,418 INFO L933 BasicCegarLoop]: 618 mSDtfsCounter, 625 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2031 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 2108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:07,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [625 Valid, 624 Invalid, 2108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2031 Invalid, 0 Unknown, 0 Unchecked, 16.9s Time] [2021-11-23 17:01:07,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4146 states. [2021-11-23 17:01:07,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4146 to 4144. [2021-11-23 17:01:07,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4144 states, 4143 states have (on average 1.2440260680666184) internal successors, (5154), 4143 states have internal predecessors, (5154), 0 states have call successors, (0), 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 17:01:07,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4144 states to 4144 states and 5154 transitions. [2021-11-23 17:01:07,538 INFO L78 Accepts]: Start accepts. Automaton has 4144 states and 5154 transitions. Word has length 127 [2021-11-23 17:01:07,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:07,539 INFO L470 AbstractCegarLoop]: Abstraction has 4144 states and 5154 transitions. [2021-11-23 17:01:07,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 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 17:01:07,540 INFO L276 IsEmpty]: Start isEmpty. Operand 4144 states and 5154 transitions. [2021-11-23 17:01:07,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-23 17:01:07,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:07,546 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:01:07,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:07,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:01:07,762 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:07,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:07,763 INFO L85 PathProgramCache]: Analyzing trace with hash 705857520, now seen corresponding path program 1 times [2021-11-23 17:01:07,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:07,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057785483] [2021-11-23 17:01:07,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:07,768 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:07,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:07,769 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:07,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:01:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:07,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:01:07,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:08,946 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:01:08,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:01:08,947 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:08,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057785483] [2021-11-23 17:01:08,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057785483] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:01:08,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:01:08,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:01:08,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349232236] [2021-11-23 17:01:08,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:08,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:01:08,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:08,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:01:08,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:01:08,950 INFO L87 Difference]: Start difference. First operand 4144 states and 5154 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 0 states have call successors, (0), 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 17:01:24,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:24,726 INFO L93 Difference]: Finished difference Result 7596 states and 9585 transitions. [2021-11-23 17:01:24,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:01:24,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-11-23 17:01:24,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:24,760 INFO L225 Difference]: With dead ends: 7596 [2021-11-23 17:01:24,760 INFO L226 Difference]: Without dead ends: 4834 [2021-11-23 17:01:24,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 132 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 17:01:24,767 INFO L933 BasicCegarLoop]: 623 mSDtfsCounter, 600 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2007 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 2012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 2007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:24,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 629 Invalid, 2012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 2007 Invalid, 0 Unknown, 0 Unchecked, 15.7s Time] [2021-11-23 17:01:24,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4834 states. [2021-11-23 17:01:24,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4834 to 4834. [2021-11-23 17:01:24,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4834 states, 4833 states have (on average 1.2116697703289883) internal successors, (5856), 4833 states have internal predecessors, (5856), 0 states have call successors, (0), 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 17:01:24,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4834 states to 4834 states and 5856 transitions. [2021-11-23 17:01:24,897 INFO L78 Accepts]: Start accepts. Automaton has 4834 states and 5856 transitions. Word has length 134 [2021-11-23 17:01:24,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:24,898 INFO L470 AbstractCegarLoop]: Abstraction has 4834 states and 5856 transitions. [2021-11-23 17:01:24,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 0 states have call successors, (0), 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 17:01:24,899 INFO L276 IsEmpty]: Start isEmpty. Operand 4834 states and 5856 transitions. [2021-11-23 17:01:24,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-23 17:01:24,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:24,902 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:01:24,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:25,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:01:25,116 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:25,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:25,117 INFO L85 PathProgramCache]: Analyzing trace with hash 721351473, now seen corresponding path program 1 times [2021-11-23 17:01:25,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:25,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15243292] [2021-11-23 17:01:25,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:25,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:25,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:25,125 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:25,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:01:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:25,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:01:25,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:25,784 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:01:25,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:01:25,784 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:25,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15243292] [2021-11-23 17:01:25,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15243292] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:01:25,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:01:25,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:01:25,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474102767] [2021-11-23 17:01:25,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:25,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:01:25,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:25,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:01:25,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:01:25,789 INFO L87 Difference]: Start difference. First operand 4834 states and 5856 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 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 17:01:46,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:46,396 INFO L93 Difference]: Finished difference Result 9666 states and 12414 transitions. [2021-11-23 17:01:46,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:01:46,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 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 223 [2021-11-23 17:01:46,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:46,424 INFO L225 Difference]: With dead ends: 9666 [2021-11-23 17:01:46,424 INFO L226 Difference]: Without dead ends: 4144 [2021-11-23 17:01:46,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 221 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 17:01:46,431 INFO L933 BasicCegarLoop]: 1196 mSDtfsCounter, 714 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1721 mSolverCounterSat, 904 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 2625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 904 IncrementalHoareTripleChecker+Valid, 1721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:46,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [714 Valid, 1203 Invalid, 2625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [904 Valid, 1721 Invalid, 0 Unknown, 0 Unchecked, 20.5s Time] [2021-11-23 17:01:46,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2021-11-23 17:01:46,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 4144. [2021-11-23 17:01:46,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4144 states, 4143 states have (on average 1.118030412744388) internal successors, (4632), 4143 states have internal predecessors, (4632), 0 states have call successors, (0), 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 17:01:46,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4144 states to 4144 states and 4632 transitions. [2021-11-23 17:01:46,532 INFO L78 Accepts]: Start accepts. Automaton has 4144 states and 4632 transitions. Word has length 223 [2021-11-23 17:01:46,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:46,533 INFO L470 AbstractCegarLoop]: Abstraction has 4144 states and 4632 transitions. [2021-11-23 17:01:46,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 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 17:01:46,534 INFO L276 IsEmpty]: Start isEmpty. Operand 4144 states and 4632 transitions. [2021-11-23 17:01:46,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2021-11-23 17:01:46,542 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:46,543 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:01:46,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:46,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:01:46,766 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:46,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:46,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1597684412, now seen corresponding path program 1 times [2021-11-23 17:01:46,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:46,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1123144552] [2021-11-23 17:01:46,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:46,770 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:46,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:46,771 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:46,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:01:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:46,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:01:46,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:48,414 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-23 17:01:48,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:01:48,414 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:48,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1123144552] [2021-11-23 17:01:48,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1123144552] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:01:48,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:01:48,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:01:48,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661495368] [2021-11-23 17:01:48,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:48,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:01:48,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:48,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:01:48,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:01:48,418 INFO L87 Difference]: Start difference. First operand 4144 states and 4632 transitions. Second operand has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 2 states have internal predecessors, (388), 0 states have call successors, (0), 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 17:02:02,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:02:02,700 INFO L93 Difference]: Finished difference Result 11736 states and 13198 transitions. [2021-11-23 17:02:02,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:02:02,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 2 states have internal predecessors, (388), 0 states have call successors, (0), 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 426 [2021-11-23 17:02:02,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:02:02,737 INFO L225 Difference]: With dead ends: 11736 [2021-11-23 17:02:02,737 INFO L226 Difference]: Without dead ends: 8284 [2021-11-23 17:02:02,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 424 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 17:02:02,747 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 396 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1780 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 2000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:02:02,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 228 Invalid, 2000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1780 Invalid, 0 Unknown, 0 Unchecked, 14.2s Time] [2021-11-23 17:02:02,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8284 states. [2021-11-23 17:02:02,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8284 to 8284. [2021-11-23 17:02:02,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8284 states, 8283 states have (on average 1.0841482554629964) internal successors, (8980), 8283 states have internal predecessors, (8980), 0 states have call successors, (0), 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 17:02:02,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8284 states to 8284 states and 8980 transitions. [2021-11-23 17:02:02,928 INFO L78 Accepts]: Start accepts. Automaton has 8284 states and 8980 transitions. Word has length 426 [2021-11-23 17:02:02,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:02:02,928 INFO L470 AbstractCegarLoop]: Abstraction has 8284 states and 8980 transitions. [2021-11-23 17:02:02,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 2 states have internal predecessors, (388), 0 states have call successors, (0), 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 17:02:02,929 INFO L276 IsEmpty]: Start isEmpty. Operand 8284 states and 8980 transitions. [2021-11-23 17:02:02,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 942 [2021-11-23 17:02:02,965 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:02:02,967 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:02:02,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:02:03,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:02:03,183 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:02:03,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:02:03,184 INFO L85 PathProgramCache]: Analyzing trace with hash 540759721, now seen corresponding path program 1 times [2021-11-23 17:02:03,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:02:03,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409567676] [2021-11-23 17:02:03,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:02:03,190 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:02:03,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:02:03,191 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:02:03,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:02:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:02:03,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 1003 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:02:03,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:06,983 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 116 proven. 172 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-23 17:02:06,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:02:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 288 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-23 17:02:08,721 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:02:08,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409567676] [2021-11-23 17:02:08,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409567676] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:02:08,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:02:08,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:02:08,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694302498] [2021-11-23 17:02:08,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:02:08,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:02:08,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:02:08,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:02:08,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:02:08,726 INFO L87 Difference]: Start difference. First operand 8284 states and 8980 transitions. Second operand has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:02:49,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:02:49,563 INFO L93 Difference]: Finished difference Result 20706 states and 22746 transitions. [2021-11-23 17:02:49,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:02:49,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 941 [2021-11-23 17:02:49,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:02:49,627 INFO L225 Difference]: With dead ends: 20706 [2021-11-23 17:02:49,628 INFO L226 Difference]: Without dead ends: 13804 [2021-11-23 17:02:49,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1880 GetRequests, 1877 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:02:49,638 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 630 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1717 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 2013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 1717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:02:49,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [630 Valid, 136 Invalid, 2013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 1717 Invalid, 0 Unknown, 0 Unchecked, 40.7s Time] [2021-11-23 17:02:49,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13804 states. [2021-11-23 17:02:49,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13804 to 13804. [2021-11-23 17:02:49,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13804 states, 13803 states have (on average 1.0772295877707745) internal successors, (14869), 13803 states have internal predecessors, (14869), 0 states have call successors, (0), 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 17:02:49,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13804 states to 13804 states and 14869 transitions. [2021-11-23 17:02:49,940 INFO L78 Accepts]: Start accepts. Automaton has 13804 states and 14869 transitions. Word has length 941 [2021-11-23 17:02:49,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:02:49,945 INFO L470 AbstractCegarLoop]: Abstraction has 13804 states and 14869 transitions. [2021-11-23 17:02:49,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:02:49,945 INFO L276 IsEmpty]: Start isEmpty. Operand 13804 states and 14869 transitions. [2021-11-23 17:02:49,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 994 [2021-11-23 17:02:49,990 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:02:49,993 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:02:50,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:02:50,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:02:50,208 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:02:50,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:02:50,209 INFO L85 PathProgramCache]: Analyzing trace with hash 2087165227, now seen corresponding path program 1 times [2021-11-23 17:02:50,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:02:50,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839250389] [2021-11-23 17:02:50,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:02:50,216 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:02:50,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:02:50,217 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:02:50,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:02:50,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:02:50,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:02:50,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:52,398 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-23 17:02:52,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:02:52,399 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:02:52,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839250389] [2021-11-23 17:02:52,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839250389] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:02:52,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:02:52,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:02:52,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210115363] [2021-11-23 17:02:52,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:02:52,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:02:52,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:02:52,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:02:52,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:02:52,403 INFO L87 Difference]: Start difference. First operand 13804 states and 14869 transitions. Second operand has 3 states, 3 states have (on average 232.33333333333334) internal successors, (697), 3 states have internal predecessors, (697), 0 states have call successors, (0), 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 17:03:07,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:07,298 INFO L93 Difference]: Finished difference Result 33126 states and 36023 transitions. [2021-11-23 17:03:07,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:03:07,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 232.33333333333334) internal successors, (697), 3 states have internal predecessors, (697), 0 states have call successors, (0), 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 993 [2021-11-23 17:03:07,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:07,352 INFO L225 Difference]: With dead ends: 33126 [2021-11-23 17:03:07,352 INFO L226 Difference]: Without dead ends: 20704 [2021-11-23 17:03:07,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 992 GetRequests, 991 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 17:03:07,365 INFO L933 BasicCegarLoop]: 910 mSDtfsCounter, 555 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1767 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 2013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 1767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:07,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [555 Valid, 917 Invalid, 2013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 1767 Invalid, 0 Unknown, 0 Unchecked, 14.7s Time] [2021-11-23 17:03:07,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20704 states. [2021-11-23 17:03:07,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20704 to 20704. [2021-11-23 17:03:07,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20704 states, 20703 states have (on average 1.0667536105878375) internal successors, (22085), 20703 states have internal predecessors, (22085), 0 states have call successors, (0), 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 17:03:07,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20704 states to 20704 states and 22085 transitions. [2021-11-23 17:03:07,724 INFO L78 Accepts]: Start accepts. Automaton has 20704 states and 22085 transitions. Word has length 993 [2021-11-23 17:03:07,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:07,726 INFO L470 AbstractCegarLoop]: Abstraction has 20704 states and 22085 transitions. [2021-11-23 17:03:07,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 232.33333333333334) internal successors, (697), 3 states have internal predecessors, (697), 0 states have call successors, (0), 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 17:03:07,727 INFO L276 IsEmpty]: Start isEmpty. Operand 20704 states and 22085 transitions. [2021-11-23 17:03:07,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1076 [2021-11-23 17:03:07,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:07,745 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:03:07,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:07,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:07,946 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:03:07,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:07,946 INFO L85 PathProgramCache]: Analyzing trace with hash 840493566, now seen corresponding path program 1 times [2021-11-23 17:03:07,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:07,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1405911181] [2021-11-23 17:03:07,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:07,952 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:07,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:07,953 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:07,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:03:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:08,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 1146 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:03:08,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:12,168 INFO L134 CoverageAnalysis]: Checked inductivity of 979 backedges. 636 proven. 0 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2021-11-23 17:03:12,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:03:12,169 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:12,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1405911181] [2021-11-23 17:03:12,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1405911181] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:03:12,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:03:12,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:03:12,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948063593] [2021-11-23 17:03:12,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:03:12,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:03:12,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:12,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:03:12,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:03:12,174 INFO L87 Difference]: Start difference. First operand 20704 states and 22085 transitions. Second operand has 4 states, 4 states have (on average 183.5) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 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 17:03:27,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:27,382 INFO L93 Difference]: Finished difference Result 40026 states and 42784 transitions. [2021-11-23 17:03:27,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:03:27,383 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 183.5) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 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 1075 [2021-11-23 17:03:27,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:27,429 INFO L225 Difference]: With dead ends: 40026 [2021-11-23 17:03:27,429 INFO L226 Difference]: Without dead ends: 20704 [2021-11-23 17:03:27,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1074 GetRequests, 1072 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:03:27,447 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 757 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 2763 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 2832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:27,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [757 Valid, 288 Invalid, 2832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2763 Invalid, 0 Unknown, 0 Unchecked, 15.0s Time] [2021-11-23 17:03:27,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20704 states. [2021-11-23 17:03:27,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20704 to 20704. [2021-11-23 17:03:27,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20704 states, 20703 states have (on average 1.0665604018741246) internal successors, (22081), 20703 states have internal predecessors, (22081), 0 states have call successors, (0), 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 17:03:27,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20704 states to 20704 states and 22081 transitions. [2021-11-23 17:03:27,846 INFO L78 Accepts]: Start accepts. Automaton has 20704 states and 22081 transitions. Word has length 1075 [2021-11-23 17:03:27,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:27,847 INFO L470 AbstractCegarLoop]: Abstraction has 20704 states and 22081 transitions. [2021-11-23 17:03:27,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 183.5) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 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 17:03:27,848 INFO L276 IsEmpty]: Start isEmpty. Operand 20704 states and 22081 transitions. [2021-11-23 17:03:27,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1081 [2021-11-23 17:03:27,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:27,866 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:03:27,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:28,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:28,083 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:03:28,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:28,084 INFO L85 PathProgramCache]: Analyzing trace with hash -624213469, now seen corresponding path program 1 times [2021-11-23 17:03:28,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:28,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [878292905] [2021-11-23 17:03:28,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:28,175 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:28,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:28,184 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:28,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:03:28,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:28,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 1152 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:03:28,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:30,402 INFO L134 CoverageAnalysis]: Checked inductivity of 987 backedges. 412 proven. 0 refuted. 0 times theorem prover too weak. 575 trivial. 0 not checked. [2021-11-23 17:03:30,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:03:30,402 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:30,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [878292905] [2021-11-23 17:03:30,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [878292905] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:03:30,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:03:30,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:03:30,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143887376] [2021-11-23 17:03:30,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:03:30,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:03:30,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:30,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:03:30,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:03:30,407 INFO L87 Difference]: Start difference. First operand 20704 states and 22081 transitions. Second operand has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:03:46,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:46,873 INFO L93 Difference]: Finished difference Result 46926 states and 50447 transitions. [2021-11-23 17:03:46,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:03:46,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1080 [2021-11-23 17:03:46,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:46,944 INFO L225 Difference]: With dead ends: 46926 [2021-11-23 17:03:46,944 INFO L226 Difference]: Without dead ends: 27604 [2021-11-23 17:03:46,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1079 GetRequests, 1078 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 17:03:46,959 INFO L933 BasicCegarLoop]: 966 mSDtfsCounter, 606 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1788 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 2026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 1788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:46,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [606 Valid, 973 Invalid, 2026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 1788 Invalid, 0 Unknown, 0 Unchecked, 16.2s Time] [2021-11-23 17:03:46,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27604 states. [2021-11-23 17:03:47,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27604 to 27604. [2021-11-23 17:03:47,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27604 states, 27603 states have (on average 1.0627105749375068) internal successors, (29334), 27603 states have internal predecessors, (29334), 0 states have call successors, (0), 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 17:03:47,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27604 states to 27604 states and 29334 transitions. [2021-11-23 17:03:47,413 INFO L78 Accepts]: Start accepts. Automaton has 27604 states and 29334 transitions. Word has length 1080 [2021-11-23 17:03:47,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:47,415 INFO L470 AbstractCegarLoop]: Abstraction has 27604 states and 29334 transitions. [2021-11-23 17:03:47,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:03:47,415 INFO L276 IsEmpty]: Start isEmpty. Operand 27604 states and 29334 transitions. [2021-11-23 17:03:47,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1102 [2021-11-23 17:03:47,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:47,567 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:03:47,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:47,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:47,768 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:03:47,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:47,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1099874001, now seen corresponding path program 1 times [2021-11-23 17:03:47,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:47,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1086892321] [2021-11-23 17:03:47,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:47,780 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:47,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:47,781 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:47,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:03:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:48,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 1171 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:03:48,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 895 trivial. 0 not checked. [2021-11-23 17:03:49,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:03:49,953 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:49,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1086892321] [2021-11-23 17:03:49,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1086892321] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:03:49,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:03:49,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:03:49,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034097293] [2021-11-23 17:03:49,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:03:49,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:03:49,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:49,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:03:49,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:03:49,959 INFO L87 Difference]: Start difference. First operand 27604 states and 29334 transitions. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 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 17:04:04,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:04:04,795 INFO L93 Difference]: Finished difference Result 60726 states and 65044 transitions. [2021-11-23 17:04:04,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:04:04,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 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 1101 [2021-11-23 17:04:04,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:04:04,871 INFO L225 Difference]: With dead ends: 60726 [2021-11-23 17:04:04,871 INFO L226 Difference]: Without dead ends: 34504 [2021-11-23 17:04:04,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1100 GetRequests, 1099 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 17:04:04,888 INFO L933 BasicCegarLoop]: 972 mSDtfsCounter, 652 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1713 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 1987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:04:04,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [652 Valid, 979 Invalid, 1987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1713 Invalid, 0 Unknown, 0 Unchecked, 14.6s Time] [2021-11-23 17:04:04,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34504 states. [2021-11-23 17:04:05,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34504 to 34504. [2021-11-23 17:04:05,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34504 states, 34503 states have (on average 1.0557342839753066) internal successors, (36426), 34503 states have internal predecessors, (36426), 0 states have call successors, (0), 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 17:04:05,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34504 states to 34504 states and 36426 transitions. [2021-11-23 17:04:05,516 INFO L78 Accepts]: Start accepts. Automaton has 34504 states and 36426 transitions. Word has length 1101 [2021-11-23 17:04:05,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:04:05,518 INFO L470 AbstractCegarLoop]: Abstraction has 34504 states and 36426 transitions. [2021-11-23 17:04:05,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 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 17:04:05,518 INFO L276 IsEmpty]: Start isEmpty. Operand 34504 states and 36426 transitions. [2021-11-23 17:04:05,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1170 [2021-11-23 17:04:05,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:04:05,676 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:04:05,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:04:05,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:04:05,877 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:04:05,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:04:05,878 INFO L85 PathProgramCache]: Analyzing trace with hash 775291628, now seen corresponding path program 1 times [2021-11-23 17:04:05,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:04:05,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [412753077] [2021-11-23 17:04:05,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:05,889 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:04:05,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:04:05,891 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:04:05,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:04:06,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:06,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 1251 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:04:06,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:10,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1360 backedges. 194 proven. 869 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-23 17:04:10,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:04:16,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1360 backedges. 785 proven. 0 refuted. 0 times theorem prover too weak. 575 trivial. 0 not checked. [2021-11-23 17:04:16,456 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:04:16,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [412753077] [2021-11-23 17:04:16,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [412753077] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:04:16,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:04:16,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-11-23 17:04:16,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468927870] [2021-11-23 17:04:16,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:04:16,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:04:16,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:04:16,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:04:16,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:04:16,459 INFO L87 Difference]: Start difference. First operand 34504 states and 36426 transitions. Second operand has 4 states, 4 states have (on average 183.5) internal successors, (734), 4 states have internal predecessors, (734), 0 states have call successors, (0), 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 17:04:39,115 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:04:40,649 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:04:50,744 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:04:56,436 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:04:59,095 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:05:03,910 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:05:19,964 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:05:32,094 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:05:33,212 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:05:46,814 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:06:03,047 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:06:15,831 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:06:25,114 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:06:26,471 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:06:35,760 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:06:37,558 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:06:40,356 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:06:51,151 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:06:52,732 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:06:55,994 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:07:02,058 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:07:05,615 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:07:07,122 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:07:20,050 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:07:24,028 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:07:26,235 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:07:29,090 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:07:34,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:07:34,678 INFO L93 Difference]: Finished difference Result 84188 states and 89928 transitions. [2021-11-23 17:07:34,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:07:34,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 183.5) internal successors, (734), 4 states have internal predecessors, (734), 0 states have call successors, (0), 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 1169 [2021-11-23 17:07:34,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:07:34,740 INFO L225 Difference]: With dead ends: 84188 [2021-11-23 17:07:34,741 INFO L226 Difference]: Without dead ends: 51066 [2021-11-23 17:07:34,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2336 GetRequests, 2330 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:07:34,777 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1271 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 3241 mSolverCounterSat, 638 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 187.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1271 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 3883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 638 IncrementalHoareTripleChecker+Valid, 3241 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 197.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:07:34,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1271 Valid, 26 Invalid, 3883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [638 Valid, 3241 Invalid, 4 Unknown, 0 Unchecked, 197.8s Time] [2021-11-23 17:07:34,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51066 states. [2021-11-23 17:07:35,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51066 to 48304. [2021-11-23 17:07:35,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48304 states, 48303 states have (on average 1.0667453367285675) internal successors, (51527), 48303 states have internal predecessors, (51527), 0 states have call successors, (0), 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 17:07:35,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48304 states to 48304 states and 51527 transitions. [2021-11-23 17:07:35,644 INFO L78 Accepts]: Start accepts. Automaton has 48304 states and 51527 transitions. Word has length 1169 [2021-11-23 17:07:35,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:07:35,645 INFO L470 AbstractCegarLoop]: Abstraction has 48304 states and 51527 transitions. [2021-11-23 17:07:35,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 183.5) internal successors, (734), 4 states have internal predecessors, (734), 0 states have call successors, (0), 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 17:07:35,646 INFO L276 IsEmpty]: Start isEmpty. Operand 48304 states and 51527 transitions. [2021-11-23 17:07:35,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1276 [2021-11-23 17:07:35,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:07:35,735 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:07:35,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-23 17:07:35,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:07:35,958 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:07:35,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:07:35,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1163497462, now seen corresponding path program 1 times [2021-11-23 17:07:35,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:07:35,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1799226179] [2021-11-23 17:07:35,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:07:35,984 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:07:35,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:07:35,985 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:07:35,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:07:36,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:07:36,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 1368 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:07:36,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:07:44,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1879 backedges. 805 proven. 631 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2021-11-23 17:07:44,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:07:49,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1879 backedges. 1158 proven. 0 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2021-11-23 17:07:49,376 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:07:49,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1799226179] [2021-11-23 17:07:49,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1799226179] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:07:49,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:07:49,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-23 17:07:49,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324791935] [2021-11-23 17:07:49,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:07:49,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:07:49,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:07:49,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:07:49,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:07:49,379 INFO L87 Difference]: Start difference. First operand 48304 states and 51527 transitions. Second operand has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 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 17:08:07,085 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:08:09,377 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:08:16,107 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:08:19,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:08:19,608 INFO L93 Difference]: Finished difference Result 102126 states and 108710 transitions. [2021-11-23 17:08:19,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:08:19,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 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 1275 [2021-11-23 17:08:19,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:08:19,676 INFO L225 Difference]: With dead ends: 102126 [2021-11-23 17:08:19,676 INFO L226 Difference]: Without dead ends: 55204 [2021-11-23 17:08:19,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2548 GetRequests, 2544 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:08:19,697 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 597 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 2006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:08:19,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [597 Valid, 39 Invalid, 2006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 29.9s Time] [2021-11-23 17:08:19,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55204 states. [2021-11-23 17:08:20,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55204 to 53824. [2021-11-23 17:08:20,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53824 states, 53823 states have (on average 1.0568344388086877) internal successors, (56882), 53823 states have internal predecessors, (56882), 0 states have call successors, (0), 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 17:08:20,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53824 states to 53824 states and 56882 transitions. [2021-11-23 17:08:20,553 INFO L78 Accepts]: Start accepts. Automaton has 53824 states and 56882 transitions. Word has length 1275 [2021-11-23 17:08:20,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:08:20,554 INFO L470 AbstractCegarLoop]: Abstraction has 53824 states and 56882 transitions. [2021-11-23 17:08:20,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 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 17:08:20,555 INFO L276 IsEmpty]: Start isEmpty. Operand 53824 states and 56882 transitions. [2021-11-23 17:08:20,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1277 [2021-11-23 17:08:20,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:08:20,745 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:08:20,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:08:20,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:08:20,963 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:08:20,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:08:20,964 INFO L85 PathProgramCache]: Analyzing trace with hash -607879658, now seen corresponding path program 1 times [2021-11-23 17:08:20,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:08:20,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [782118275] [2021-11-23 17:08:20,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:08:20,976 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:08:20,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:08:20,977 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:08:21,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:08:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:08:21,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 1369 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:08:21,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:08:26,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1911 backedges. 638 proven. 937 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2021-11-23 17:08:26,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:08:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1911 backedges. 1297 proven. 0 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2021-11-23 17:08:33,302 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:08:33,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [782118275] [2021-11-23 17:08:33,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [782118275] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:08:33,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:08:33,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-11-23 17:08:33,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509773434] [2021-11-23 17:08:33,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:08:33,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:08:33,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:08:33,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:08:33,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:08:33,305 INFO L87 Difference]: Start difference. First operand 53824 states and 56882 transitions. Second operand has 4 states, 4 states have (on average 200.75) internal successors, (803), 4 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:09:11,927 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:09:35,349 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:09:43,595 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:09:51,535 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:10:20,224 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:10:44,349 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:10:49,404 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:11:02,665 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:11:11,421 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:11:17,463 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:11:23,798 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:11:25,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:11:25,749 INFO L93 Difference]: Finished difference Result 117998 states and 124587 transitions. [2021-11-23 17:11:25,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:11:25,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 200.75) internal successors, (803), 4 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1276 [2021-11-23 17:11:25,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:11:25,825 INFO L225 Difference]: With dead ends: 117998 [2021-11-23 17:11:25,825 INFO L226 Difference]: Without dead ends: 65556 [2021-11-23 17:11:25,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2550 GetRequests, 2544 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:11:25,844 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 1213 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3469 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 160.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1213 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 3898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 3469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 172.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:11:25,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1213 Valid, 225 Invalid, 3898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 3469 Invalid, 0 Unknown, 0 Unchecked, 172.0s Time] [2021-11-23 17:11:25,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65556 states. [2021-11-23 17:11:26,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65556 to 61414. [2021-11-23 17:11:26,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61414 states, 61413 states have (on average 1.052952957842802) internal successors, (64665), 61413 states have internal predecessors, (64665), 0 states have call successors, (0), 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 17:11:26,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61414 states to 61414 states and 64665 transitions. [2021-11-23 17:11:26,781 INFO L78 Accepts]: Start accepts. Automaton has 61414 states and 64665 transitions. Word has length 1276 [2021-11-23 17:11:26,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:11:26,782 INFO L470 AbstractCegarLoop]: Abstraction has 61414 states and 64665 transitions. [2021-11-23 17:11:26,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 200.75) internal successors, (803), 4 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:11:26,783 INFO L276 IsEmpty]: Start isEmpty. Operand 61414 states and 64665 transitions. [2021-11-23 17:11:26,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1328 [2021-11-23 17:11:26,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:11:26,803 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:11:26,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:11:27,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:11:27,006 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:11:27,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:11:27,008 INFO L85 PathProgramCache]: Analyzing trace with hash -149167241, now seen corresponding path program 1 times [2021-11-23 17:11:27,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:11:27,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946619721] [2021-11-23 17:11:27,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:11:27,020 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:11:27,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:11:27,206 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:11:27,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:11:27,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:11:27,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 1407 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:11:27,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:11:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 194 proven. 1295 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-23 17:11:33,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:11:48,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 1104 proven. 107 refuted. 0 times theorem prover too weak. 575 trivial. 0 not checked. [2021-11-23 17:11:48,766 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:11:48,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946619721] [2021-11-23 17:11:48,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946619721] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:11:48,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1766092405] [2021-11-23 17:11:48,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:11:48,767 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:11:48,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:11:48,775 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:11:48,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-23 17:11:49,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:11:49,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 1407 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:11:49,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:11:52,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 1592 trivial. 0 not checked. [2021-11-23 17:11:52,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:11:52,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1766092405] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:11:52,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:11:52,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 4] total 11 [2021-11-23 17:11:52,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751966916] [2021-11-23 17:11:52,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:11:52,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:11:52,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:11:52,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:11:52,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:11:52,048 INFO L87 Difference]: Start difference. First operand 61414 states and 64665 transitions. Second operand has 5 states, 5 states have (on average 112.2) internal successors, (561), 5 states have internal predecessors, (561), 0 states have call successors, (0), 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 17:12:11,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:12:11,003 INFO L93 Difference]: Finished difference Result 134570 states and 142070 transitions. [2021-11-23 17:12:11,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:12:11,007 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 112.2) internal successors, (561), 5 states have internal predecessors, (561), 0 states have call successors, (0), 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 1327 [2021-11-23 17:12:11,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:12:11,090 INFO L225 Difference]: With dead ends: 134570 [2021-11-23 17:12:11,090 INFO L226 Difference]: Without dead ends: 74538 [2021-11-23 17:12:11,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3978 GetRequests, 3969 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:12:11,110 INFO L933 BasicCegarLoop]: 931 mSDtfsCounter, 694 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 3698 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 3934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 3698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:12:11,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [694 Valid, 958 Invalid, 3934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 3698 Invalid, 0 Unknown, 0 Unchecked, 18.4s Time] [2021-11-23 17:12:11,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74538 states. [2021-11-23 17:12:12,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74538 to 73834. [2021-11-23 17:12:12,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73834 states, 73833 states have (on average 1.0462530304877222) internal successors, (77248), 73833 states have internal predecessors, (77248), 0 states have call successors, (0), 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 17:12:12,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73834 states to 73834 states and 77248 transitions. [2021-11-23 17:12:12,666 INFO L78 Accepts]: Start accepts. Automaton has 73834 states and 77248 transitions. Word has length 1327 [2021-11-23 17:12:12,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:12:12,668 INFO L470 AbstractCegarLoop]: Abstraction has 73834 states and 77248 transitions. [2021-11-23 17:12:12,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 112.2) internal successors, (561), 5 states have internal predecessors, (561), 0 states have call successors, (0), 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 17:12:12,669 INFO L276 IsEmpty]: Start isEmpty. Operand 73834 states and 77248 transitions. [2021-11-23 17:12:12,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1464 [2021-11-23 17:12:12,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:12:12,704 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:12:12,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-23 17:12:13,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:12:13,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:12:13,118 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:12:13,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:12:13,119 INFO L85 PathProgramCache]: Analyzing trace with hash 135834818, now seen corresponding path program 1 times [2021-11-23 17:12:13,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:12:13,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [199881129] [2021-11-23 17:12:13,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:12:13,131 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:12:13,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:12:13,133 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:12:13,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 17:12:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:12:13,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 1558 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:12:13,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2317 backedges. 677 proven. 0 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2021-11-23 17:12:16,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:12:16,170 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:12:16,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [199881129] [2021-11-23 17:12:16,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [199881129] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:12:16,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:12:16,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:12:16,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170041432] [2021-11-23 17:12:16,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:12:16,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:12:16,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:12:16,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:12:16,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:12:16,173 INFO L87 Difference]: Start difference. First operand 73834 states and 77248 transitions. Second operand has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 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 17:12:30,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:12:30,610 INFO L93 Difference]: Finished difference Result 158706 states and 166814 transitions. [2021-11-23 17:12:30,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:12:30,611 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 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 1463 [2021-11-23 17:12:30,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:12:30,715 INFO L225 Difference]: With dead ends: 158706 [2021-11-23 17:12:30,715 INFO L226 Difference]: Without dead ends: 81424 [2021-11-23 17:12:30,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1462 GetRequests, 1461 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 17:12:30,739 INFO L933 BasicCegarLoop]: 932 mSDtfsCounter, 616 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1656 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 1934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 1656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:12:30,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 938 Invalid, 1934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 1656 Invalid, 0 Unknown, 0 Unchecked, 13.7s Time] [2021-11-23 17:12:30,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81424 states. [2021-11-23 17:12:31,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81424 to 80044. [2021-11-23 17:12:31,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80044 states, 80043 states have (on average 1.0410904139025274) internal successors, (83332), 80043 states have internal predecessors, (83332), 0 states have call successors, (0), 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 17:12:32,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80044 states to 80044 states and 83332 transitions. [2021-11-23 17:12:32,009 INFO L78 Accepts]: Start accepts. Automaton has 80044 states and 83332 transitions. Word has length 1463 [2021-11-23 17:12:32,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:12:32,011 INFO L470 AbstractCegarLoop]: Abstraction has 80044 states and 83332 transitions. [2021-11-23 17:12:32,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 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 17:12:32,011 INFO L276 IsEmpty]: Start isEmpty. Operand 80044 states and 83332 transitions. [2021-11-23 17:12:32,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1527 [2021-11-23 17:12:32,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:12:32,270 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:12:32,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:12:32,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:12:32,478 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:12:32,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:12:32,479 INFO L85 PathProgramCache]: Analyzing trace with hash 657837551, now seen corresponding path program 1 times [2021-11-23 17:12:32,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:12:32,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935710228] [2021-11-23 17:12:32,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:12:32,487 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:12:32,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:12:32,489 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:12:32,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399e9f78-3bdf-4b6a-b915-bd8381407502/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 17:12:33,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:12:33,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 1619 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:12:33,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:12:35,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2555 backedges. 915 proven. 0 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2021-11-23 17:12:35,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:12:35,270 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:12:35,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935710228] [2021-11-23 17:12:35,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [935710228] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:12:35,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:12:35,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:12:35,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239742242] [2021-11-23 17:12:35,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:12:35,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:12:35,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:12:35,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:12:35,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:12:35,275 INFO L87 Difference]: Start difference. First operand 80044 states and 83332 transitions. Second operand has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)