./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.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_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/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_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/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_31045fb3-c4ce-49ce-ac1e-76df7857e591/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 742f5d2e7cf114f57c75e9ec70cbf1110245ef125564c2c81d93a290329b3301 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:58:46,134 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:58:46,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:58:46,184 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:58:46,185 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:58:46,190 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:58:46,192 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:58:46,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:58:46,198 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:58:46,204 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:58:46,205 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:58:46,207 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:58:46,208 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:58:46,211 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:58:46,213 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:58:46,218 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:58:46,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:58:46,222 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:58:46,225 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:58:46,235 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:58:46,237 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:58:46,238 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:58:46,240 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:58:46,241 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:58:46,244 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:58:46,245 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:58:46,245 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:58:46,246 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:58:46,247 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:58:46,248 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:58:46,249 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:58:46,250 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:58:46,251 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:58:46,251 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:58:46,253 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:58:46,253 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:58:46,254 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:58:46,254 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:58:46,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:58:46,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:58:46,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:58:46,257 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 16:58:46,283 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:58:46,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:58:46,284 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:58:46,285 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:58:46,289 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:58:46,289 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:58:46,289 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:58:46,289 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:58:46,289 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:58:46,290 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:58:46,290 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:58:46,290 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:58:46,290 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:58:46,290 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:58:46,290 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:58:46,291 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:58:46,291 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:58:46,291 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:58:46,292 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:58:46,292 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:58:46,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:58:46,292 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:58:46,293 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:58:46,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:58:46,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:58:46,293 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:58:46,293 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:58:46,293 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:58:46,294 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:58:46,294 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:58:46,294 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:58:46,294 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:58:46,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:58:46,295 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:58:46,295 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:58:46,295 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:58:46,295 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:58:46,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:58:46,296 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:58:46,296 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:58:46,296 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:58:46,296 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_31045fb3-c4ce-49ce-ac1e-76df7857e591/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 742f5d2e7cf114f57c75e9ec70cbf1110245ef125564c2c81d93a290329b3301 [2021-11-23 16:58:46,542 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:58:46,564 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:58:46,567 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:58:46,568 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:58:46,569 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:58:46,570 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-23 16:58:46,654 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/data/cad6df12a/09a0b54816454f4681517a0bb6daf2b8/FLAG1a70c2c90 [2021-11-23 16:58:47,274 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:58:47,275 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-23 16:58:47,311 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/data/cad6df12a/09a0b54816454f4681517a0bb6daf2b8/FLAG1a70c2c90 [2021-11-23 16:58:47,513 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/data/cad6df12a/09a0b54816454f4681517a0bb6daf2b8 [2021-11-23 16:58:47,518 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:58:47,520 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:58:47,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:58:47,524 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:58:47,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:58:47,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:58:47" (1/1) ... [2021-11-23 16:58:47,532 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ff5fcd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:47, skipping insertion in model container [2021-11-23 16:58:47,532 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:58:47" (1/1) ... [2021-11-23 16:58:47,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:58:47,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:58:48,007 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_31045fb3-c4ce-49ce-ac1e-76df7857e591/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[15866,15879] [2021-11-23 16:58:48,104 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:58:48,118 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:58:48,269 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_31045fb3-c4ce-49ce-ac1e-76df7857e591/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[15866,15879] [2021-11-23 16:58:48,330 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:58:48,361 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:58:48,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:48 WrapperNode [2021-11-23 16:58:48,362 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:58:48,363 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:58:48,363 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:58:48,363 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:58:48,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:48" (1/1) ... [2021-11-23 16:58:48,410 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:48" (1/1) ... [2021-11-23 16:58:48,513 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1292 [2021-11-23 16:58:48,513 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:58:48,514 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:58:48,514 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:58:48,514 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:58:48,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:48" (1/1) ... [2021-11-23 16:58:48,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:48" (1/1) ... [2021-11-23 16:58:48,547 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:48" (1/1) ... [2021-11-23 16:58:48,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:48" (1/1) ... [2021-11-23 16:58:48,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:48" (1/1) ... [2021-11-23 16:58:48,601 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:48" (1/1) ... [2021-11-23 16:58:48,625 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:48" (1/1) ... [2021-11-23 16:58:48,640 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:58:48,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:58:48,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:58:48,641 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:58:48,643 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:48" (1/1) ... [2021-11-23 16:58:48,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:58:48,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:58:48,679 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:58:48,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:58:48,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:58:48,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 16:58:48,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:58:48,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:58:48,873 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:58:48,874 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:58:50,105 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:58:50,206 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 16:58:50,210 INFO L158 Benchmark]: Toolchain (without parser) took 2689.96ms. Allocated memory is still 140.5MB. Free memory was 104.3MB in the beginning and 65.8MB in the end (delta: 38.4MB). Peak memory consumption was 66.4MB. Max. memory is 16.1GB. [2021-11-23 16:58:50,211 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 92.3MB. Free memory was 46.5MB in the beginning and 46.5MB in the end (delta: 45.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:58:50,212 INFO L158 Benchmark]: CACSL2BoogieTranslator took 837.97ms. Allocated memory is still 140.5MB. Free memory was 104.3MB in the beginning and 96.5MB in the end (delta: 7.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 16:58:50,213 INFO L158 Benchmark]: Boogie Procedure Inliner took 150.49ms. Allocated memory is still 140.5MB. Free memory was 96.5MB in the beginning and 91.7MB in the end (delta: 4.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-23 16:58:50,214 INFO L158 Benchmark]: Boogie Preprocessor took 126.39ms. Allocated memory is still 140.5MB. Free memory was 91.7MB in the beginning and 88.1MB in the end (delta: 3.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 16:58:50,214 INFO L158 Benchmark]: RCFGBuilder took 1567.69ms. Allocated memory is still 140.5MB. Free memory was 88.1MB in the beginning and 65.8MB in the end (delta: 22.3MB). Peak memory consumption was 52.2MB. Max. memory is 16.1GB. [2021-11-23 16:58:50,218 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 92.3MB. Free memory was 46.5MB in the beginning and 46.5MB in the end (delta: 45.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 837.97ms. Allocated memory is still 140.5MB. Free memory was 104.3MB in the beginning and 96.5MB in the end (delta: 7.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 150.49ms. Allocated memory is still 140.5MB. Free memory was 96.5MB in the beginning and 91.7MB in the end (delta: 4.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 126.39ms. Allocated memory is still 140.5MB. Free memory was 91.7MB in the beginning and 88.1MB in the end (delta: 3.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1567.69ms. Allocated memory is still 140.5MB. Free memory was 88.1MB in the beginning and 65.8MB in the end (delta: 22.3MB). Peak memory consumption was 52.2MB. 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 16:58:50,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/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_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/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_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/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_31045fb3-c4ce-49ce-ac1e-76df7857e591/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 742f5d2e7cf114f57c75e9ec70cbf1110245ef125564c2c81d93a290329b3301 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:58:52,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:58:52,815 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:58:52,871 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:58:52,872 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:58:52,876 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:58:52,878 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:58:52,883 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:58:52,886 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:58:52,894 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:58:52,896 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:58:52,898 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:58:52,898 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:58:52,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:58:52,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:58:52,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:58:52,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:58:52,911 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:58:52,913 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:58:52,915 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:58:52,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:58:52,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:58:52,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:58:52,924 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:58:52,927 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:58:52,928 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:58:52,928 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:58:52,929 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:58:52,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:58:52,931 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:58:52,931 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:58:52,932 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:58:52,934 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:58:52,935 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:58:52,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:58:52,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:58:52,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:58:52,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:58:52,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:58:52,939 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:58:52,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:58:52,943 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 16:58:52,985 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:58:52,985 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:58:52,986 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:58:52,986 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:58:52,987 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:58:52,988 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:58:52,988 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:58:52,988 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:58:52,988 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:58:52,988 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:58:52,989 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:58:52,990 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:58:52,991 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:58:52,992 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:58:52,992 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:58:52,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:58:52,992 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:58:52,992 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:58:52,992 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:58:52,993 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:58:52,993 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:58:52,993 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:58:52,993 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:58:52,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:58:52,994 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:58:52,994 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:58:52,994 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:58:52,994 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:58:52,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:58:52,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:58:52,995 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:58:52,995 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:58:52,996 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:58:52,996 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:58:52,996 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:58:52,996 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:58:52,996 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:58:52,997 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:58:52,997 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_31045fb3-c4ce-49ce-ac1e-76df7857e591/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 742f5d2e7cf114f57c75e9ec70cbf1110245ef125564c2c81d93a290329b3301 [2021-11-23 16:58:53,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:58:53,495 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:58:53,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:58:53,501 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:58:53,502 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:58:53,504 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-23 16:58:53,594 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/data/21c32c742/dbf81d1e625a4e8489dab98d7b37c088/FLAGc7cfd5cd8 [2021-11-23 16:58:54,316 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:58:54,316 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-23 16:58:54,336 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/data/21c32c742/dbf81d1e625a4e8489dab98d7b37c088/FLAGc7cfd5cd8 [2021-11-23 16:58:54,553 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/data/21c32c742/dbf81d1e625a4e8489dab98d7b37c088 [2021-11-23 16:58:54,556 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:58:54,557 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:58:54,559 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:58:54,559 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:58:54,563 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:58:54,564 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:58:54" (1/1) ... [2021-11-23 16:58:54,565 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23a138b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:54, skipping insertion in model container [2021-11-23 16:58:54,565 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:58:54" (1/1) ... [2021-11-23 16:58:54,577 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:58:54,657 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:58:55,076 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_31045fb3-c4ce-49ce-ac1e-76df7857e591/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[15866,15879] [2021-11-23 16:58:55,177 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:58:55,205 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:58:55,396 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_31045fb3-c4ce-49ce-ac1e-76df7857e591/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[15866,15879] [2021-11-23 16:58:55,484 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:58:55,501 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:58:55,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:55 WrapperNode [2021-11-23 16:58:55,502 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:58:55,503 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:58:55,503 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:58:55,504 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:58:55,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:55" (1/1) ... [2021-11-23 16:58:55,534 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:55" (1/1) ... [2021-11-23 16:58:55,606 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1277 [2021-11-23 16:58:55,606 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:58:55,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:58:55,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:58:55,607 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:58:55,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:55" (1/1) ... [2021-11-23 16:58:55,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:55" (1/1) ... [2021-11-23 16:58:55,625 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:55" (1/1) ... [2021-11-23 16:58:55,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:55" (1/1) ... [2021-11-23 16:58:55,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:55" (1/1) ... [2021-11-23 16:58:55,697 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:55" (1/1) ... [2021-11-23 16:58:55,717 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:55" (1/1) ... [2021-11-23 16:58:55,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:58:55,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:58:55,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:58:55,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:58:55,727 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:55" (1/1) ... [2021-11-23 16:58:55,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:58:55,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:58:55,774 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:58:55,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:58:55,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:58:55,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 16:58:55,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:58:55,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:58:56,014 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:58:56,016 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:58:57,160 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:58:57,179 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:58:57,180 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 16:58:57,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:58:57 BoogieIcfgContainer [2021-11-23 16:58:57,183 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:58:57,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:58:57,187 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:58:57,190 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:58:57,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:58:54" (1/3) ... [2021-11-23 16:58:57,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@426a6ba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:58:57, skipping insertion in model container [2021-11-23 16:58:57,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:58:55" (2/3) ... [2021-11-23 16:58:57,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@426a6ba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:58:57, skipping insertion in model container [2021-11-23 16:58:57,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:58:57" (3/3) ... [2021-11-23 16:58:57,194 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-23 16:58:57,200 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:58:57,200 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 16:58:57,271 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:58:57,290 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 16:58:57,290 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 16:58:57,324 INFO L276 IsEmpty]: Start isEmpty. Operand has 344 states, 342 states have (on average 1.7690058479532165) internal successors, (605), 343 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:58:57,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-23 16:58:57,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:58:57,357 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:58:57,358 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:58:57,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:58:57,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1491324598, now seen corresponding path program 1 times [2021-11-23 16:58:57,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:58:57,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [243206811] [2021-11-23 16:58:57,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:58:57,382 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:58:57,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:58:57,388 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:58:57,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 16:58:57,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:58:57,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:58:57,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:58:58,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:58:58,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:58:58,122 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:58:58,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [243206811] [2021-11-23 16:58:58,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [243206811] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:58:58,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:58:58,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:58:58,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078841394] [2021-11-23 16:58:58,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:58:58,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:58:58,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:58:58,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:58:58,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:58:58,174 INFO L87 Difference]: Start difference. First operand has 344 states, 342 states have (on average 1.7690058479532165) internal successors, (605), 343 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:58:58,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:58:58,436 INFO L93 Difference]: Finished difference Result 999 states and 1760 transitions. [2021-11-23 16:58:58,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:58:58,438 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 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 155 [2021-11-23 16:58:58,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:58:58,464 INFO L225 Difference]: With dead ends: 999 [2021-11-23 16:58:58,464 INFO L226 Difference]: Without dead ends: 658 [2021-11-23 16:58:58,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 152 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 16:58:58,477 INFO L933 BasicCegarLoop]: 934 mSDtfsCounter, 1346 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1346 SdHoareTripleChecker+Valid, 1486 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:58:58,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1346 Valid, 1486 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:58:58,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-11-23 16:58:58,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 656. [2021-11-23 16:58:58,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 655 states have (on average 1.4610687022900763) internal successors, (957), 655 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:58:58,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 957 transitions. [2021-11-23 16:58:58,596 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 957 transitions. Word has length 155 [2021-11-23 16:58:58,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:58:58,597 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 957 transitions. [2021-11-23 16:58:58,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:58:58,598 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 957 transitions. [2021-11-23 16:58:58,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-23 16:58:58,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:58:58,603 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:58:58,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 16:58:58,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:58:58,815 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:58:58,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:58:58,817 INFO L85 PathProgramCache]: Analyzing trace with hash 718729430, now seen corresponding path program 1 times [2021-11-23 16:58:58,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:58:58,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1067731736] [2021-11-23 16:58:58,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:58:58,818 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:58:58,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:58:58,819 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:58:58,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 16:58:59,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:58:59,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:58:59,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:58:59,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:58:59,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:58:59,325 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:58:59,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1067731736] [2021-11-23 16:58:59,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1067731736] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:58:59,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:58:59,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:58:59,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224549357] [2021-11-23 16:58:59,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:58:59,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:58:59,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:58:59,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:58:59,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:58:59,338 INFO L87 Difference]: Start difference. First operand 656 states and 957 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:58:59,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:58:59,413 INFO L93 Difference]: Finished difference Result 1930 states and 2809 transitions. [2021-11-23 16:58:59,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:58:59,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 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 156 [2021-11-23 16:58:59,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:58:59,428 INFO L225 Difference]: With dead ends: 1930 [2021-11-23 16:58:59,428 INFO L226 Difference]: Without dead ends: 1302 [2021-11-23 16:58:59,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:58:59,432 INFO L933 BasicCegarLoop]: 699 mSDtfsCounter, 492 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:58:59,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 1193 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:58:59,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-11-23 16:58:59,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 658. [2021-11-23 16:58:59,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 1.4596651445966515) internal successors, (959), 657 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:58:59,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 959 transitions. [2021-11-23 16:58:59,480 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 959 transitions. Word has length 156 [2021-11-23 16:58:59,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:58:59,481 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 959 transitions. [2021-11-23 16:58:59,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:58:59,481 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 959 transitions. [2021-11-23 16:58:59,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-23 16:58:59,484 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:58:59,484 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:58:59,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 16:58:59,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:58:59,697 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:58:59,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:58:59,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1473114647, now seen corresponding path program 1 times [2021-11-23 16:58:59,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:58:59,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1728015027] [2021-11-23 16:58:59,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:58:59,699 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:58:59,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:58:59,700 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:58:59,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 16:58:59,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:58:59,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:58:59,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:00,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:00,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:59:00,154 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:00,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1728015027] [2021-11-23 16:59:00,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1728015027] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:59:00,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:59:00,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:59:00,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474213916] [2021-11-23 16:59:00,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:59:00,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:59:00,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:59:00,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:59:00,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:59:00,157 INFO L87 Difference]: Start difference. First operand 658 states and 959 transitions. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:00,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:59:00,209 INFO L93 Difference]: Finished difference Result 1306 states and 1904 transitions. [2021-11-23 16:59:00,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:59:00,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 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 157 [2021-11-23 16:59:00,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:59:00,214 INFO L225 Difference]: With dead ends: 1306 [2021-11-23 16:59:00,214 INFO L226 Difference]: Without dead ends: 656 [2021-11-23 16:59:00,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 154 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 16:59:00,216 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 69 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1542 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:59:00,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 1542 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:59:00,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-11-23 16:59:00,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 656. [2021-11-23 16:59:00,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 655 states have (on average 1.4580152671755726) internal successors, (955), 655 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:00,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 955 transitions. [2021-11-23 16:59:00,253 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 955 transitions. Word has length 157 [2021-11-23 16:59:00,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:59:00,253 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 955 transitions. [2021-11-23 16:59:00,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:00,254 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 955 transitions. [2021-11-23 16:59:00,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-23 16:59:00,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:59:00,257 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:59:00,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 16:59:00,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:59:00,468 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:59:00,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:59:00,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1975952879, now seen corresponding path program 1 times [2021-11-23 16:59:00,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:59:00,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [775130529] [2021-11-23 16:59:00,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:00,471 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:59:00,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:59:00,471 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:59:00,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 16:59:00,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:00,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:59:00,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:00,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:00,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:59:00,907 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:00,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [775130529] [2021-11-23 16:59:00,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [775130529] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:59:00,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:59:00,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:59:00,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460415266] [2021-11-23 16:59:00,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:59:00,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:59:00,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:59:00,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:59:00,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:59:00,911 INFO L87 Difference]: Start difference. First operand 656 states and 955 transitions. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:01,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:59:01,037 INFO L93 Difference]: Finished difference Result 1615 states and 2346 transitions. [2021-11-23 16:59:01,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:59:01,038 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 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 157 [2021-11-23 16:59:01,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:59:01,044 INFO L225 Difference]: With dead ends: 1615 [2021-11-23 16:59:01,045 INFO L226 Difference]: Without dead ends: 969 [2021-11-23 16:59:01,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 154 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 16:59:01,053 INFO L933 BasicCegarLoop]: 721 mSDtfsCounter, 1139 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1139 SdHoareTripleChecker+Valid, 1164 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:59:01,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1139 Valid, 1164 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:59:01,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-11-23 16:59:01,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 967. [2021-11-23 16:59:01,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 1.4368530020703933) internal successors, (1388), 966 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:01,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 1388 transitions. [2021-11-23 16:59:01,122 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 1388 transitions. Word has length 157 [2021-11-23 16:59:01,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:59:01,125 INFO L470 AbstractCegarLoop]: Abstraction has 967 states and 1388 transitions. [2021-11-23 16:59:01,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:01,125 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 1388 transitions. [2021-11-23 16:59:01,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-23 16:59:01,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:59:01,128 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:59:01,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 16:59:01,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:59:01,344 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:59:01,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:59:01,345 INFO L85 PathProgramCache]: Analyzing trace with hash 693964807, now seen corresponding path program 1 times [2021-11-23 16:59:01,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:59:01,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1126659000] [2021-11-23 16:59:01,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:01,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:59:01,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:59:01,347 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:59:01,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 16:59:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:01,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:59:01,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:01,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:01,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:59:01,794 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:01,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1126659000] [2021-11-23 16:59:01,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1126659000] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:59:01,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:59:01,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:59:01,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937456814] [2021-11-23 16:59:01,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:59:01,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:59:01,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:59:01,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:59:01,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:59:01,797 INFO L87 Difference]: Start difference. First operand 967 states and 1388 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:01,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:59:01,909 INFO L93 Difference]: Finished difference Result 2148 states and 3168 transitions. [2021-11-23 16:59:01,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:59:01,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 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 161 [2021-11-23 16:59:01,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:59:01,918 INFO L225 Difference]: With dead ends: 2148 [2021-11-23 16:59:01,918 INFO L226 Difference]: Without dead ends: 1361 [2021-11-23 16:59:01,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:59:01,921 INFO L933 BasicCegarLoop]: 704 mSDtfsCounter, 315 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:59:01,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 1073 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:59:01,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2021-11-23 16:59:02,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1191. [2021-11-23 16:59:02,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 1190 states have (on average 1.4722689075630253) internal successors, (1752), 1190 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:02,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 1752 transitions. [2021-11-23 16:59:02,026 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 1752 transitions. Word has length 161 [2021-11-23 16:59:02,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:59:02,027 INFO L470 AbstractCegarLoop]: Abstraction has 1191 states and 1752 transitions. [2021-11-23 16:59:02,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:02,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 1752 transitions. [2021-11-23 16:59:02,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 16:59:02,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:59:02,030 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:59:02,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 16:59:02,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:59:02,246 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:59:02,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:59:02,247 INFO L85 PathProgramCache]: Analyzing trace with hash 371888939, now seen corresponding path program 1 times [2021-11-23 16:59:02,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:59:02,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952896420] [2021-11-23 16:59:02,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:02,248 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:59:02,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:59:02,249 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:59:02,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 16:59:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:02,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:59:02,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:03,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:03,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:59:03,004 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:03,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [952896420] [2021-11-23 16:59:03,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [952896420] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:59:03,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:59:03,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:59:03,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711538647] [2021-11-23 16:59:03,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:59:03,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:59:03,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:59:03,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:59:03,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:59:03,007 INFO L87 Difference]: Start difference. First operand 1191 states and 1752 transitions. Second operand has 5 states, 5 states have (on average 32.8) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:03,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:59:03,268 INFO L93 Difference]: Finished difference Result 1878 states and 2787 transitions. [2021-11-23 16:59:03,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:59:03,269 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 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 164 [2021-11-23 16:59:03,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:59:03,276 INFO L225 Difference]: With dead ends: 1878 [2021-11-23 16:59:03,276 INFO L226 Difference]: Without dead ends: 1191 [2021-11-23 16:59:03,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:59:03,278 INFO L933 BasicCegarLoop]: 492 mSDtfsCounter, 59 mSDsluCounter, 1057 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1549 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:59:03,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 1549 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 190 Invalid, 0 Unknown, 113 Unchecked, 0.2s Time] [2021-11-23 16:59:03,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-11-23 16:59:03,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1191. [2021-11-23 16:59:03,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 1190 states have (on average 1.4705882352941178) internal successors, (1750), 1190 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:03,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 1750 transitions. [2021-11-23 16:59:03,362 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 1750 transitions. Word has length 164 [2021-11-23 16:59:03,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:59:03,363 INFO L470 AbstractCegarLoop]: Abstraction has 1191 states and 1750 transitions. [2021-11-23 16:59:03,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:03,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 1750 transitions. [2021-11-23 16:59:03,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 16:59:03,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:59:03,367 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:59:03,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 16:59:03,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:59:03,578 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:59:03,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:59:03,579 INFO L85 PathProgramCache]: Analyzing trace with hash 902417158, now seen corresponding path program 1 times [2021-11-23 16:59:03,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:59:03,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [374903687] [2021-11-23 16:59:03,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:03,580 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:59:03,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:59:03,580 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:59:03,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 16:59:03,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:03,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:59:03,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:04,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:04,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:59:04,075 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:04,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [374903687] [2021-11-23 16:59:04,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [374903687] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:59:04,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:59:04,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:59:04,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398750756] [2021-11-23 16:59:04,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:59:04,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:59:04,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:59:04,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:59:04,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:59:04,078 INFO L87 Difference]: Start difference. First operand 1191 states and 1750 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:04,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:59:04,286 INFO L93 Difference]: Finished difference Result 3443 states and 5043 transitions. [2021-11-23 16:59:04,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:59:04,287 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 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 164 [2021-11-23 16:59:04,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:59:04,301 INFO L225 Difference]: With dead ends: 3443 [2021-11-23 16:59:04,301 INFO L226 Difference]: Without dead ends: 2287 [2021-11-23 16:59:04,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 161 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 16:59:04,306 INFO L933 BasicCegarLoop]: 793 mSDtfsCounter, 971 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 1238 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:59:04,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [971 Valid, 1238 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:59:04,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2021-11-23 16:59:04,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 2285. [2021-11-23 16:59:04,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2285 states, 2284 states have (on average 1.453152364273205) internal successors, (3319), 2284 states have internal predecessors, (3319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:04,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2285 states to 2285 states and 3319 transitions. [2021-11-23 16:59:04,475 INFO L78 Accepts]: Start accepts. Automaton has 2285 states and 3319 transitions. Word has length 164 [2021-11-23 16:59:04,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:59:04,477 INFO L470 AbstractCegarLoop]: Abstraction has 2285 states and 3319 transitions. [2021-11-23 16:59:04,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:04,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2285 states and 3319 transitions. [2021-11-23 16:59:04,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-23 16:59:04,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:59:04,483 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:59:04,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-23 16:59:04,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:59:04,695 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:59:04,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:59:04,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1656324870, now seen corresponding path program 1 times [2021-11-23 16:59:04,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:59:04,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1167226961] [2021-11-23 16:59:04,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:04,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:59:04,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:59:04,697 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:59:04,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 16:59:04,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:04,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:59:04,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:05,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:05,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:59:05,089 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:05,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1167226961] [2021-11-23 16:59:05,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1167226961] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:59:05,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:59:05,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:59:05,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694315295] [2021-11-23 16:59:05,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:59:05,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:59:05,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:59:05,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:59:05,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:59:05,092 INFO L87 Difference]: Start difference. First operand 2285 states and 3319 transitions. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:05,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:59:05,425 INFO L93 Difference]: Finished difference Result 6643 states and 9616 transitions. [2021-11-23 16:59:05,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:59:05,425 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 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 165 [2021-11-23 16:59:05,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:59:05,449 INFO L225 Difference]: With dead ends: 6643 [2021-11-23 16:59:05,450 INFO L226 Difference]: Without dead ends: 4393 [2021-11-23 16:59:05,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 162 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 16:59:05,454 INFO L933 BasicCegarLoop]: 794 mSDtfsCounter, 1074 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1074 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:59:05,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1074 Valid, 1240 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:59:05,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4393 states. [2021-11-23 16:59:05,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4393 to 4391. [2021-11-23 16:59:05,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4391 states, 4390 states have (on average 1.4339407744874715) internal successors, (6295), 4390 states have internal predecessors, (6295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:05,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4391 states to 4391 states and 6295 transitions. [2021-11-23 16:59:05,787 INFO L78 Accepts]: Start accepts. Automaton has 4391 states and 6295 transitions. Word has length 165 [2021-11-23 16:59:05,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:59:05,788 INFO L470 AbstractCegarLoop]: Abstraction has 4391 states and 6295 transitions. [2021-11-23 16:59:05,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:05,788 INFO L276 IsEmpty]: Start isEmpty. Operand 4391 states and 6295 transitions. [2021-11-23 16:59:05,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-23 16:59:05,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:59:05,795 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:59:05,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 16:59:06,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:59:06,013 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:59:06,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:59:06,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1110058788, now seen corresponding path program 1 times [2021-11-23 16:59:06,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:59:06,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1414475938] [2021-11-23 16:59:06,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:06,015 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:59:06,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:59:06,017 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:59:06,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 16:59:06,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:06,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:59:06,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:06,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:06,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:59:06,436 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:06,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1414475938] [2021-11-23 16:59:06,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1414475938] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:59:06,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:59:06,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:59:06,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190985320] [2021-11-23 16:59:06,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:59:06,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:59:06,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:59:06,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:59:06,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:59:06,440 INFO L87 Difference]: Start difference. First operand 4391 states and 6295 transitions. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:06,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:59:06,691 INFO L93 Difference]: Finished difference Result 6484 states and 9324 transitions. [2021-11-23 16:59:06,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:59:06,692 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 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 166 [2021-11-23 16:59:06,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:59:06,712 INFO L225 Difference]: With dead ends: 6484 [2021-11-23 16:59:06,713 INFO L226 Difference]: Without dead ends: 3696 [2021-11-23 16:59:06,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 163 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 16:59:06,720 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 55 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 1517 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:59:06,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 1517 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:59:06,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3696 states. [2021-11-23 16:59:06,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3696 to 3696. [2021-11-23 16:59:06,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3696 states, 3695 states have (on average 1.4316644113667119) internal successors, (5290), 3695 states have internal predecessors, (5290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:06,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3696 states to 3696 states and 5290 transitions. [2021-11-23 16:59:06,995 INFO L78 Accepts]: Start accepts. Automaton has 3696 states and 5290 transitions. Word has length 166 [2021-11-23 16:59:06,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:59:06,996 INFO L470 AbstractCegarLoop]: Abstraction has 3696 states and 5290 transitions. [2021-11-23 16:59:06,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:06,996 INFO L276 IsEmpty]: Start isEmpty. Operand 3696 states and 5290 transitions. [2021-11-23 16:59:07,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-23 16:59:07,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:59:07,003 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:59:07,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 16:59:07,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:59:07,215 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:59:07,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:59:07,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1188682908, now seen corresponding path program 1 times [2021-11-23 16:59:07,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:59:07,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1796919446] [2021-11-23 16:59:07,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:07,217 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:59:07,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:59:07,218 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:59:07,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 16:59:07,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:07,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:59:07,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:07,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:07,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:59:07,657 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:07,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1796919446] [2021-11-23 16:59:07,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1796919446] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:59:07,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:59:07,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:59:07,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63189003] [2021-11-23 16:59:07,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:59:07,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:59:07,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:59:07,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:59:07,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:59:07,661 INFO L87 Difference]: Start difference. First operand 3696 states and 5290 transitions. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:07,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:59:07,883 INFO L93 Difference]: Finished difference Result 6661 states and 9527 transitions. [2021-11-23 16:59:07,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:59:07,883 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 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 166 [2021-11-23 16:59:07,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:59:07,900 INFO L225 Difference]: With dead ends: 6661 [2021-11-23 16:59:07,900 INFO L226 Difference]: Without dead ends: 3008 [2021-11-23 16:59:07,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 163 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 16:59:07,906 INFO L933 BasicCegarLoop]: 524 mSDtfsCounter, 45 mSDsluCounter, 979 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1503 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:59:07,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 1503 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:59:07,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-11-23 16:59:08,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 3008. [2021-11-23 16:59:08,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 1.4276687728633188) internal successors, (4293), 3007 states have internal predecessors, (4293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:08,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4293 transitions. [2021-11-23 16:59:08,205 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4293 transitions. Word has length 166 [2021-11-23 16:59:08,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:59:08,205 INFO L470 AbstractCegarLoop]: Abstraction has 3008 states and 4293 transitions. [2021-11-23 16:59:08,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:08,206 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4293 transitions. [2021-11-23 16:59:08,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-23 16:59:08,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:59:08,223 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:59:08,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 16:59:08,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:59:08,435 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:59:08,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:59:08,436 INFO L85 PathProgramCache]: Analyzing trace with hash -721263813, now seen corresponding path program 1 times [2021-11-23 16:59:08,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:59:08,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [299556075] [2021-11-23 16:59:08,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:08,437 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:59:08,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:59:08,438 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:59:08,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 16:59:08,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:08,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:59:08,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:08,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:08,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:59:08,871 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:08,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [299556075] [2021-11-23 16:59:08,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [299556075] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:59:08,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:59:08,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:59:08,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114215398] [2021-11-23 16:59:08,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:59:08,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:59:08,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:59:08,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:59:08,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:59:08,874 INFO L87 Difference]: Start difference. First operand 3008 states and 4293 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:09,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:59:09,224 INFO L93 Difference]: Finished difference Result 6962 states and 10261 transitions. [2021-11-23 16:59:09,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:59:09,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 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 170 [2021-11-23 16:59:09,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:59:09,251 INFO L225 Difference]: With dead ends: 6962 [2021-11-23 16:59:09,251 INFO L226 Difference]: Without dead ends: 4475 [2021-11-23 16:59:09,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:59:09,256 INFO L933 BasicCegarLoop]: 688 mSDtfsCounter, 306 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:59:09,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 1041 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:59:09,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4475 states. [2021-11-23 16:59:09,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4475 to 4021. [2021-11-23 16:59:09,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4021 states, 4020 states have (on average 1.4701492537313432) internal successors, (5910), 4020 states have internal predecessors, (5910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:09,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4021 states to 4021 states and 5910 transitions. [2021-11-23 16:59:09,530 INFO L78 Accepts]: Start accepts. Automaton has 4021 states and 5910 transitions. Word has length 170 [2021-11-23 16:59:09,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:59:09,531 INFO L470 AbstractCegarLoop]: Abstraction has 4021 states and 5910 transitions. [2021-11-23 16:59:09,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:09,531 INFO L276 IsEmpty]: Start isEmpty. Operand 4021 states and 5910 transitions. [2021-11-23 16:59:09,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-23 16:59:09,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:59:09,538 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:59:09,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 16:59:09,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:59:09,750 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:59:09,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:59:09,750 INFO L85 PathProgramCache]: Analyzing trace with hash -857244127, now seen corresponding path program 1 times [2021-11-23 16:59:09,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:59:09,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353005729] [2021-11-23 16:59:09,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:09,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:59:09,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:59:09,753 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:59:09,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 16:59:09,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:09,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:59:09,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:10,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:10,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:59:10,571 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:10,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353005729] [2021-11-23 16:59:10,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353005729] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:59:10,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:59:10,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:59:10,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39136792] [2021-11-23 16:59:10,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:59:10,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:59:10,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:59:10,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:59:10,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:59:10,573 INFO L87 Difference]: Start difference. First operand 4021 states and 5910 transitions. Second operand has 5 states, 5 states have (on average 34.6) internal successors, (173), 4 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:10,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:59:10,906 INFO L93 Difference]: Finished difference Result 5695 states and 8457 transitions. [2021-11-23 16:59:10,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:59:10,907 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.6) internal successors, (173), 4 states have internal predecessors, (173), 0 states have call successors, (0), 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 173 [2021-11-23 16:59:10,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:59:10,941 INFO L225 Difference]: With dead ends: 5695 [2021-11-23 16:59:10,941 INFO L226 Difference]: Without dead ends: 4050 [2021-11-23 16:59:10,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:59:10,946 INFO L933 BasicCegarLoop]: 480 mSDtfsCounter, 80 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:59:10,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 907 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 11 Unchecked, 0.1s Time] [2021-11-23 16:59:10,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4050 states. [2021-11-23 16:59:11,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4050 to 4030. [2021-11-23 16:59:11,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4030 states, 4029 states have (on average 1.4695954331099528) internal successors, (5921), 4029 states have internal predecessors, (5921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:11,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4030 states to 4030 states and 5921 transitions. [2021-11-23 16:59:11,270 INFO L78 Accepts]: Start accepts. Automaton has 4030 states and 5921 transitions. Word has length 173 [2021-11-23 16:59:11,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:59:11,270 INFO L470 AbstractCegarLoop]: Abstraction has 4030 states and 5921 transitions. [2021-11-23 16:59:11,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.6) internal successors, (173), 4 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:11,272 INFO L276 IsEmpty]: Start isEmpty. Operand 4030 states and 5921 transitions. [2021-11-23 16:59:11,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-23 16:59:11,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:59:11,279 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:59:11,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 16:59:11,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:59:11,486 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:59:11,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:59:11,487 INFO L85 PathProgramCache]: Analyzing trace with hash -986401050, now seen corresponding path program 1 times [2021-11-23 16:59:11,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:59:11,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1390204118] [2021-11-23 16:59:11,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:11,487 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:59:11,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:59:11,488 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:59:11,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 16:59:11,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:11,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:59:11,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:12,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:12,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:59:12,055 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:12,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1390204118] [2021-11-23 16:59:12,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1390204118] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:59:12,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:59:12,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:59:12,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898143394] [2021-11-23 16:59:12,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:59:12,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:59:12,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:59:12,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:59:12,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:59:12,057 INFO L87 Difference]: Start difference. First operand 4030 states and 5921 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:12,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:59:12,417 INFO L93 Difference]: Finished difference Result 9601 states and 14283 transitions. [2021-11-23 16:59:12,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:59:12,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 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 173 [2021-11-23 16:59:12,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:59:12,433 INFO L225 Difference]: With dead ends: 9601 [2021-11-23 16:59:12,433 INFO L226 Difference]: Without dead ends: 6241 [2021-11-23 16:59:12,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:59:12,439 INFO L933 BasicCegarLoop]: 893 mSDtfsCounter, 345 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 1331 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:59:12,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 1331 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:59:12,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6241 states. [2021-11-23 16:59:12,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6241 to 6239. [2021-11-23 16:59:12,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6239 states, 6238 states have (on average 1.4579993587688362) internal successors, (9095), 6238 states have internal predecessors, (9095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:12,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6239 states to 6239 states and 9095 transitions. [2021-11-23 16:59:12,856 INFO L78 Accepts]: Start accepts. Automaton has 6239 states and 9095 transitions. Word has length 173 [2021-11-23 16:59:12,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:59:12,856 INFO L470 AbstractCegarLoop]: Abstraction has 6239 states and 9095 transitions. [2021-11-23 16:59:12,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:12,857 INFO L276 IsEmpty]: Start isEmpty. Operand 6239 states and 9095 transitions. [2021-11-23 16:59:12,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-23 16:59:12,864 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:59:12,864 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:59:12,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 16:59:13,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:59:13,076 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:59:13,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:59:13,076 INFO L85 PathProgramCache]: Analyzing trace with hash -748378049, now seen corresponding path program 1 times [2021-11-23 16:59:13,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:59:13,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339413333] [2021-11-23 16:59:13,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:13,077 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:59:13,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:59:13,078 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:59:13,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 16:59:13,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:13,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:59:13,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:13,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:13,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:59:13,736 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:13,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339413333] [2021-11-23 16:59:13,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339413333] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:59:13,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:59:13,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:59:13,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666347559] [2021-11-23 16:59:13,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:59:13,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:59:13,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:59:13,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:59:13,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:59:13,738 INFO L87 Difference]: Start difference. First operand 6239 states and 9095 transitions. Second operand has 5 states, 5 states have (on average 34.6) internal successors, (173), 4 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:14,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:59:14,175 INFO L93 Difference]: Finished difference Result 10365 states and 15295 transitions. [2021-11-23 16:59:14,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:59:14,175 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.6) internal successors, (173), 4 states have internal predecessors, (173), 0 states have call successors, (0), 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 173 [2021-11-23 16:59:14,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:59:14,190 INFO L225 Difference]: With dead ends: 10365 [2021-11-23 16:59:14,191 INFO L226 Difference]: Without dead ends: 6239 [2021-11-23 16:59:14,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:59:14,198 INFO L933 BasicCegarLoop]: 486 mSDtfsCounter, 69 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:59:14,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 901 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 96 Invalid, 0 Unknown, 5 Unchecked, 0.1s Time] [2021-11-23 16:59:14,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6239 states. [2021-11-23 16:59:14,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6239 to 6239. [2021-11-23 16:59:14,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6239 states, 6238 states have (on average 1.4573581276050016) internal successors, (9091), 6238 states have internal predecessors, (9091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:14,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6239 states to 6239 states and 9091 transitions. [2021-11-23 16:59:14,614 INFO L78 Accepts]: Start accepts. Automaton has 6239 states and 9091 transitions. Word has length 173 [2021-11-23 16:59:14,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:59:14,615 INFO L470 AbstractCegarLoop]: Abstraction has 6239 states and 9091 transitions. [2021-11-23 16:59:14,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.6) internal successors, (173), 4 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:14,615 INFO L276 IsEmpty]: Start isEmpty. Operand 6239 states and 9091 transitions. [2021-11-23 16:59:14,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-23 16:59:14,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:59:14,623 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:59:14,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 16:59:14,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:59:14,847 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:59:14,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:59:14,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1620574022, now seen corresponding path program 1 times [2021-11-23 16:59:14,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:59:14,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2119964112] [2021-11-23 16:59:14,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:14,848 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:59:14,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:59:14,849 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:59:14,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 16:59:15,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:15,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:59:15,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:15,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:15,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:59:15,360 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:15,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2119964112] [2021-11-23 16:59:15,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2119964112] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:59:15,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:59:15,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:59:15,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260622249] [2021-11-23 16:59:15,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:59:15,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:59:15,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:59:15,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:59:15,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:59:15,362 INFO L87 Difference]: Start difference. First operand 6239 states and 9091 transitions. Second operand has 4 states, 4 states have (on average 43.25) internal successors, (173), 4 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:15,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:59:15,726 INFO L93 Difference]: Finished difference Result 12552 states and 18248 transitions. [2021-11-23 16:59:15,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:59:15,727 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 4 states have internal predecessors, (173), 0 states have call successors, (0), 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 173 [2021-11-23 16:59:15,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:59:15,742 INFO L225 Difference]: With dead ends: 12552 [2021-11-23 16:59:15,743 INFO L226 Difference]: Without dead ends: 6398 [2021-11-23 16:59:15,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 170 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 16:59:15,752 INFO L933 BasicCegarLoop]: 757 mSDtfsCounter, 949 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 949 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:59:15,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [949 Valid, 1189 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:59:15,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6398 states. [2021-11-23 16:59:16,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6398 to 6351. [2021-11-23 16:59:16,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6351 states, 6350 states have (on average 1.4488188976377954) internal successors, (9200), 6350 states have internal predecessors, (9200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:16,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6351 states to 6351 states and 9200 transitions. [2021-11-23 16:59:16,106 INFO L78 Accepts]: Start accepts. Automaton has 6351 states and 9200 transitions. Word has length 173 [2021-11-23 16:59:16,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:59:16,107 INFO L470 AbstractCegarLoop]: Abstraction has 6351 states and 9200 transitions. [2021-11-23 16:59:16,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 4 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:16,107 INFO L276 IsEmpty]: Start isEmpty. Operand 6351 states and 9200 transitions. [2021-11-23 16:59:16,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-23 16:59:16,114 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:59:16,114 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:59:16,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 16:59:16,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:59:16,326 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:59:16,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:59:16,327 INFO L85 PathProgramCache]: Analyzing trace with hash -65212718, now seen corresponding path program 1 times [2021-11-23 16:59:16,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:59:16,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [980825363] [2021-11-23 16:59:16,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:16,328 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:59:16,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:59:16,329 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:59:16,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 16:59:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:16,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:59:16,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:16,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:59:16,706 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:16,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [980825363] [2021-11-23 16:59:16,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [980825363] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:59:16,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:59:16,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:59:16,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922743802] [2021-11-23 16:59:16,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:59:16,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:59:16,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:59:16,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:59:16,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:59:16,709 INFO L87 Difference]: Start difference. First operand 6351 states and 9200 transitions. Second operand has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:17,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:59:17,133 INFO L93 Difference]: Finished difference Result 16167 states and 23388 transitions. [2021-11-23 16:59:17,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:59:17,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 0 states have call successors, (0), 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 174 [2021-11-23 16:59:17,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:59:17,155 INFO L225 Difference]: With dead ends: 16167 [2021-11-23 16:59:17,155 INFO L226 Difference]: Without dead ends: 9985 [2021-11-23 16:59:17,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 171 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 16:59:17,164 INFO L933 BasicCegarLoop]: 747 mSDtfsCounter, 1093 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1093 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:59:17,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1093 Valid, 1180 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:59:17,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9985 states. [2021-11-23 16:59:17,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9985 to 9983. [2021-11-23 16:59:17,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9983 states, 9982 states have (on average 1.42837106792226) internal successors, (14258), 9982 states have internal predecessors, (14258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:18,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9983 states to 9983 states and 14258 transitions. [2021-11-23 16:59:18,004 INFO L78 Accepts]: Start accepts. Automaton has 9983 states and 14258 transitions. Word has length 174 [2021-11-23 16:59:18,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:59:18,005 INFO L470 AbstractCegarLoop]: Abstraction has 9983 states and 14258 transitions. [2021-11-23 16:59:18,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:18,005 INFO L276 IsEmpty]: Start isEmpty. Operand 9983 states and 14258 transitions. [2021-11-23 16:59:18,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-23 16:59:18,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:59:18,015 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:59:18,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 16:59:18,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:59:18,227 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:59:18,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:59:18,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1858552010, now seen corresponding path program 1 times [2021-11-23 16:59:18,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:59:18,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1029190076] [2021-11-23 16:59:18,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:18,229 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:59:18,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:59:18,230 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:59:18,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 16:59:18,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:18,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:59:18,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:18,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:18,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:59:18,635 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:18,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1029190076] [2021-11-23 16:59:18,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1029190076] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:59:18,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:59:18,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:59:18,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395849166] [2021-11-23 16:59:18,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:59:18,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:59:18,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:59:18,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:59:18,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:59:18,637 INFO L87 Difference]: Start difference. First operand 9983 states and 14258 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:19,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:59:19,326 INFO L93 Difference]: Finished difference Result 22303 states and 32726 transitions. [2021-11-23 16:59:19,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:59:19,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 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 179 [2021-11-23 16:59:19,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:59:19,355 INFO L225 Difference]: With dead ends: 22303 [2021-11-23 16:59:19,356 INFO L226 Difference]: Without dead ends: 14926 [2021-11-23 16:59:19,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:59:19,365 INFO L933 BasicCegarLoop]: 676 mSDtfsCounter, 300 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:59:19,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 1016 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:59:19,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14926 states. [2021-11-23 16:59:20,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14926 to 13788. [2021-11-23 16:59:20,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13788 states, 13787 states have (on average 1.4652933923261042) internal successors, (20202), 13787 states have internal predecessors, (20202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:20,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13788 states to 13788 states and 20202 transitions. [2021-11-23 16:59:20,331 INFO L78 Accepts]: Start accepts. Automaton has 13788 states and 20202 transitions. Word has length 179 [2021-11-23 16:59:20,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:59:20,332 INFO L470 AbstractCegarLoop]: Abstraction has 13788 states and 20202 transitions. [2021-11-23 16:59:20,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:20,332 INFO L276 IsEmpty]: Start isEmpty. Operand 13788 states and 20202 transitions. [2021-11-23 16:59:20,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-23 16:59:20,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:59:20,341 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:59:20,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-23 16:59:20,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:59:20,553 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:59:20,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:59:20,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1469204674, now seen corresponding path program 1 times [2021-11-23 16:59:20,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:59:20,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573409836] [2021-11-23 16:59:20,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:20,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:59:20,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:59:20,555 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:59:20,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 16:59:20,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:20,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:59:20,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:20,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:20,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:59:20,934 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:20,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573409836] [2021-11-23 16:59:20,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1573409836] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:59:20,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:59:20,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:59:20,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168919562] [2021-11-23 16:59:20,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:59:20,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:59:20,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:59:20,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:59:20,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:59:20,936 INFO L87 Difference]: Start difference. First operand 13788 states and 20202 transitions. Second operand has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:21,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:59:21,688 INFO L93 Difference]: Finished difference Result 19908 states and 29233 transitions. [2021-11-23 16:59:21,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:59:21,688 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 0 states have call successors, (0), 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 180 [2021-11-23 16:59:21,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:59:21,716 INFO L225 Difference]: With dead ends: 19908 [2021-11-23 16:59:21,716 INFO L226 Difference]: Without dead ends: 12466 [2021-11-23 16:59:21,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 177 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 16:59:21,730 INFO L933 BasicCegarLoop]: 504 mSDtfsCounter, 23 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1466 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:59:21,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 1466 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:59:21,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12466 states. [2021-11-23 16:59:22,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12466 to 12466. [2021-11-23 16:59:22,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12466 states, 12465 states have (on average 1.4683513838748496) internal successors, (18303), 12465 states have internal predecessors, (18303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:22,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12466 states to 12466 states and 18303 transitions. [2021-11-23 16:59:22,549 INFO L78 Accepts]: Start accepts. Automaton has 12466 states and 18303 transitions. Word has length 180 [2021-11-23 16:59:22,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:59:22,549 INFO L470 AbstractCegarLoop]: Abstraction has 12466 states and 18303 transitions. [2021-11-23 16:59:22,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:22,549 INFO L276 IsEmpty]: Start isEmpty. Operand 12466 states and 18303 transitions. [2021-11-23 16:59:22,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-23 16:59:22,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:59:22,556 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:59:22,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-23 16:59:22,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:59:22,765 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:59:22,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:59:22,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1146790544, now seen corresponding path program 1 times [2021-11-23 16:59:22,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:59:22,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [544251401] [2021-11-23 16:59:22,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:22,766 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:59:22,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:59:22,767 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:59:22,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 16:59:22,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:22,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:59:22,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:23,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:23,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:59:23,515 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:23,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [544251401] [2021-11-23 16:59:23,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [544251401] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:59:23,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:59:23,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:59:23,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036885302] [2021-11-23 16:59:23,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:59:23,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:59:23,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:59:23,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:59:23,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:59:23,517 INFO L87 Difference]: Start difference. First operand 12466 states and 18303 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:24,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:59:24,191 INFO L93 Difference]: Finished difference Result 17397 states and 25758 transitions. [2021-11-23 16:59:24,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:59:24,191 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2021-11-23 16:59:24,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:59:24,211 INFO L225 Difference]: With dead ends: 17397 [2021-11-23 16:59:24,211 INFO L226 Difference]: Without dead ends: 12538 [2021-11-23 16:59:24,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:59:24,218 INFO L933 BasicCegarLoop]: 471 mSDtfsCounter, 73 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:59:24,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 1202 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 113 Unchecked, 0.1s Time] [2021-11-23 16:59:24,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12538 states. [2021-11-23 16:59:24,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12538 to 12482. [2021-11-23 16:59:24,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12482 states, 12481 states have (on average 1.4679112250620945) internal successors, (18321), 12481 states have internal predecessors, (18321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:24,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12482 states to 12482 states and 18321 transitions. [2021-11-23 16:59:24,800 INFO L78 Accepts]: Start accepts. Automaton has 12482 states and 18321 transitions. Word has length 182 [2021-11-23 16:59:24,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:59:24,800 INFO L470 AbstractCegarLoop]: Abstraction has 12482 states and 18321 transitions. [2021-11-23 16:59:24,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:24,801 INFO L276 IsEmpty]: Start isEmpty. Operand 12482 states and 18321 transitions. [2021-11-23 16:59:24,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-23 16:59:24,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:59:24,808 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:59:24,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 16:59:25,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:59:25,020 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:59:25,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:59:25,021 INFO L85 PathProgramCache]: Analyzing trace with hash -220617845, now seen corresponding path program 1 times [2021-11-23 16:59:25,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:59:25,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1266629891] [2021-11-23 16:59:25,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:25,022 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:59:25,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:59:25,022 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:59:25,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 16:59:25,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:25,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:59:25,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:25,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:25,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:59:25,441 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:25,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1266629891] [2021-11-23 16:59:25,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1266629891] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:59:25,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:59:25,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:59:25,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702747766] [2021-11-23 16:59:25,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:59:25,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:59:25,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:59:25,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:59:25,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:59:25,443 INFO L87 Difference]: Start difference. First operand 12482 states and 18321 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:26,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:59:26,547 INFO L93 Difference]: Finished difference Result 33440 states and 50367 transitions. [2021-11-23 16:59:26,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:59:26,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2021-11-23 16:59:26,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:59:26,579 INFO L225 Difference]: With dead ends: 33440 [2021-11-23 16:59:26,579 INFO L226 Difference]: Without dead ends: 23297 [2021-11-23 16:59:26,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 179 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 16:59:26,593 INFO L933 BasicCegarLoop]: 779 mSDtfsCounter, 434 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 1935 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:59:26,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 1935 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:59:26,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23297 states. [2021-11-23 16:59:27,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23297 to 13082. [2021-11-23 16:59:27,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13082 states, 13081 states have (on average 1.4533292561730755) internal successors, (19011), 13081 states have internal predecessors, (19011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:27,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13082 states to 13082 states and 19011 transitions. [2021-11-23 16:59:27,757 INFO L78 Accepts]: Start accepts. Automaton has 13082 states and 19011 transitions. Word has length 182 [2021-11-23 16:59:27,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:59:27,758 INFO L470 AbstractCegarLoop]: Abstraction has 13082 states and 19011 transitions. [2021-11-23 16:59:27,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:27,758 INFO L276 IsEmpty]: Start isEmpty. Operand 13082 states and 19011 transitions. [2021-11-23 16:59:27,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-23 16:59:27,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:59:27,766 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:59:27,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-23 16:59:27,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:59:27,966 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:59:27,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:59:27,967 INFO L85 PathProgramCache]: Analyzing trace with hash -805542069, now seen corresponding path program 1 times [2021-11-23 16:59:27,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:59:27,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1650003098] [2021-11-23 16:59:27,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:27,968 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:59:27,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:59:27,969 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:59:27,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 16:59:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:28,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:59:28,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:28,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:28,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:59:28,335 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:28,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1650003098] [2021-11-23 16:59:28,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1650003098] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:59:28,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:59:28,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:59:28,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430635542] [2021-11-23 16:59:28,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:59:28,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:59:28,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:59:28,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:59:28,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:59:28,337 INFO L87 Difference]: Start difference. First operand 13082 states and 19011 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:29,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:59:29,742 INFO L93 Difference]: Finished difference Result 34131 states and 51073 transitions. [2021-11-23 16:59:29,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:59:29,742 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2021-11-23 16:59:29,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:59:29,773 INFO L225 Difference]: With dead ends: 34131 [2021-11-23 16:59:29,773 INFO L226 Difference]: Without dead ends: 24229 [2021-11-23 16:59:29,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 179 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 16:59:29,785 INFO L933 BasicCegarLoop]: 752 mSDtfsCounter, 424 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 1892 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:59:29,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 1892 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:59:29,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24229 states. [2021-11-23 16:59:30,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24229 to 14255. [2021-11-23 16:59:30,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14255 states, 14254 states have (on average 1.4301248772274449) internal successors, (20385), 14254 states have internal predecessors, (20385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:30,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14255 states to 14255 states and 20385 transitions. [2021-11-23 16:59:30,709 INFO L78 Accepts]: Start accepts. Automaton has 14255 states and 20385 transitions. Word has length 182 [2021-11-23 16:59:30,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:59:30,710 INFO L470 AbstractCegarLoop]: Abstraction has 14255 states and 20385 transitions. [2021-11-23 16:59:30,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:30,710 INFO L276 IsEmpty]: Start isEmpty. Operand 14255 states and 20385 transitions. [2021-11-23 16:59:30,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-23 16:59:30,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:59:30,718 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:59:30,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 16:59:30,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:59:30,918 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:59:30,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:59:30,919 INFO L85 PathProgramCache]: Analyzing trace with hash 912065456, now seen corresponding path program 1 times [2021-11-23 16:59:30,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:59:30,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [270408493] [2021-11-23 16:59:30,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:30,919 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:59:30,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:59:30,920 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:59:30,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 16:59:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:31,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:59:31,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:31,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:31,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:59:31,292 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:31,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [270408493] [2021-11-23 16:59:31,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [270408493] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:59:31,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:59:31,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:59:31,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702520644] [2021-11-23 16:59:31,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:59:31,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:59:31,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:59:31,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:59:31,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:59:31,295 INFO L87 Difference]: Start difference. First operand 14255 states and 20385 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:32,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:59:32,644 INFO L93 Difference]: Finished difference Result 35700 states and 52807 transitions. [2021-11-23 16:59:32,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:59:32,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2021-11-23 16:59:32,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:59:32,678 INFO L225 Difference]: With dead ends: 35700 [2021-11-23 16:59:32,678 INFO L226 Difference]: Without dead ends: 26039 [2021-11-23 16:59:32,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 179 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 16:59:32,685 INFO L933 BasicCegarLoop]: 739 mSDtfsCounter, 418 mSDsluCounter, 1126 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 1865 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:59:32,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 1865 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:59:32,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26039 states. [2021-11-23 16:59:33,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26039 to 16306. [2021-11-23 16:59:33,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16306 states, 16305 states have (on average 1.3975467647960749) internal successors, (22787), 16305 states have internal predecessors, (22787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:33,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16306 states to 16306 states and 22787 transitions. [2021-11-23 16:59:33,589 INFO L78 Accepts]: Start accepts. Automaton has 16306 states and 22787 transitions. Word has length 182 [2021-11-23 16:59:33,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:59:33,589 INFO L470 AbstractCegarLoop]: Abstraction has 16306 states and 22787 transitions. [2021-11-23 16:59:33,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:33,590 INFO L276 IsEmpty]: Start isEmpty. Operand 16306 states and 22787 transitions. [2021-11-23 16:59:33,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-23 16:59:33,600 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:59:33,600 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:59:33,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-23 16:59:33,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:59:33,801 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:59:33,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:59:33,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1412913628, now seen corresponding path program 1 times [2021-11-23 16:59:33,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:59:33,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20652627] [2021-11-23 16:59:33,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:33,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:59:33,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:59:33,803 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:59:33,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 16:59:33,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:33,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:59:33,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:35,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:35,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:59:35,034 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:35,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20652627] [2021-11-23 16:59:35,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20652627] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:59:35,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:59:35,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:59:35,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701514739] [2021-11-23 16:59:35,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:59:35,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:59:35,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:59:35,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:59:35,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:59:35,036 INFO L87 Difference]: Start difference. First operand 16306 states and 22787 transitions. Second operand has 8 states, 8 states have (on average 22.75) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:36,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:59:36,265 INFO L93 Difference]: Finished difference Result 21319 states and 30320 transitions. [2021-11-23 16:59:36,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:59:36,266 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.75) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2021-11-23 16:59:36,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:59:36,288 INFO L225 Difference]: With dead ends: 21319 [2021-11-23 16:59:36,288 INFO L226 Difference]: Without dead ends: 17289 [2021-11-23 16:59:36,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-23 16:59:36,296 INFO L933 BasicCegarLoop]: 503 mSDtfsCounter, 294 mSDsluCounter, 1885 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 2388 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 228 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:59:36,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 2388 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 228 Unchecked, 0.1s Time] [2021-11-23 16:59:36,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17289 states. [2021-11-23 16:59:37,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17289 to 16616. [2021-11-23 16:59:37,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16616 states, 16615 states have (on average 1.3941619018958773) internal successors, (23164), 16615 states have internal predecessors, (23164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:37,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16616 states to 16616 states and 23164 transitions. [2021-11-23 16:59:37,548 INFO L78 Accepts]: Start accepts. Automaton has 16616 states and 23164 transitions. Word has length 182 [2021-11-23 16:59:37,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:59:37,548 INFO L470 AbstractCegarLoop]: Abstraction has 16616 states and 23164 transitions. [2021-11-23 16:59:37,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.75) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:37,549 INFO L276 IsEmpty]: Start isEmpty. Operand 16616 states and 23164 transitions. [2021-11-23 16:59:37,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-23 16:59:37,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:59:37,567 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:59:37,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-23 16:59:37,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:59:37,779 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:59:37,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:59:37,779 INFO L85 PathProgramCache]: Analyzing trace with hash -548302245, now seen corresponding path program 1 times [2021-11-23 16:59:37,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:59:37,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819860346] [2021-11-23 16:59:37,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:37,780 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:59:37,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:59:37,781 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:59:37,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 16:59:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:37,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:59:37,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:38,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:38,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:59:38,255 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:38,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1819860346] [2021-11-23 16:59:38,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1819860346] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:59:38,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:59:38,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:59:38,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226455684] [2021-11-23 16:59:38,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:59:38,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:59:38,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:59:38,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:59:38,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:59:38,258 INFO L87 Difference]: Start difference. First operand 16616 states and 23164 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:39,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:59:39,828 INFO L93 Difference]: Finished difference Result 36972 states and 54510 transitions. [2021-11-23 16:59:39,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:59:39,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2021-11-23 16:59:39,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:59:39,864 INFO L225 Difference]: With dead ends: 36972 [2021-11-23 16:59:39,864 INFO L226 Difference]: Without dead ends: 27732 [2021-11-23 16:59:39,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:59:39,877 INFO L933 BasicCegarLoop]: 496 mSDtfsCounter, 307 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:59:39,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 852 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:59:39,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27732 states. [2021-11-23 16:59:41,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27732 to 27730. [2021-11-23 16:59:41,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27730 states, 27729 states have (on average 1.4415233149410365) internal successors, (39972), 27729 states have internal predecessors, (39972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:41,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27730 states to 27730 states and 39972 transitions. [2021-11-23 16:59:41,582 INFO L78 Accepts]: Start accepts. Automaton has 27730 states and 39972 transitions. Word has length 182 [2021-11-23 16:59:41,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:59:41,582 INFO L470 AbstractCegarLoop]: Abstraction has 27730 states and 39972 transitions. [2021-11-23 16:59:41,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:41,582 INFO L276 IsEmpty]: Start isEmpty. Operand 27730 states and 39972 transitions. [2021-11-23 16:59:41,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-23 16:59:41,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:59:41,592 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:59:41,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-23 16:59:41,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:59:41,792 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:59:41,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:59:41,793 INFO L85 PathProgramCache]: Analyzing trace with hash -2059479234, now seen corresponding path program 1 times [2021-11-23 16:59:41,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:59:41,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1032501003] [2021-11-23 16:59:41,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:41,794 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:59:41,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:59:41,794 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:59:41,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-23 16:59:41,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:41,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 16:59:41,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:59:52,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:59:52,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:59:52,350 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:59:52,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1032501003] [2021-11-23 16:59:52,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1032501003] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:59:52,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:59:52,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-11-23 16:59:52,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702315408] [2021-11-23 16:59:52,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:59:52,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 16:59:52,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:59:52,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 16:59:52,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-11-23 16:59:52,351 INFO L87 Difference]: Start difference. First operand 27730 states and 39972 transitions. Second operand has 23 states, 23 states have (on average 7.913043478260869) internal successors, (182), 23 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:53,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:59:53,976 INFO L93 Difference]: Finished difference Result 36588 states and 53588 transitions. [2021-11-23 16:59:53,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 16:59:53,977 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 7.913043478260869) internal successors, (182), 23 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2021-11-23 16:59:53,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:59:54,014 INFO L225 Difference]: With dead ends: 36588 [2021-11-23 16:59:54,014 INFO L226 Difference]: Without dead ends: 27695 [2021-11-23 16:59:54,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-11-23 16:59:54,028 INFO L933 BasicCegarLoop]: 480 mSDtfsCounter, 98 mSDsluCounter, 6178 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 6658 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1168 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:59:54,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 6658 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 1168 Unchecked, 0.0s Time] [2021-11-23 16:59:54,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27695 states. [2021-11-23 16:59:55,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27695 to 27628. [2021-11-23 16:59:55,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27628 states, 27627 states have (on average 1.4423209179425924) internal successors, (39847), 27627 states have internal predecessors, (39847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:55,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27628 states to 27628 states and 39847 transitions. [2021-11-23 16:59:55,596 INFO L78 Accepts]: Start accepts. Automaton has 27628 states and 39847 transitions. Word has length 182 [2021-11-23 16:59:55,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:59:55,597 INFO L470 AbstractCegarLoop]: Abstraction has 27628 states and 39847 transitions. [2021-11-23 16:59:55,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.913043478260869) internal successors, (182), 23 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:59:55,597 INFO L276 IsEmpty]: Start isEmpty. Operand 27628 states and 39847 transitions. [2021-11-23 16:59:55,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-23 16:59:55,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:59:55,607 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:59:55,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-23 16:59:55,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:59:55,808 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:59:55,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:59:55,808 INFO L85 PathProgramCache]: Analyzing trace with hash 949524214, now seen corresponding path program 1 times [2021-11-23 16:59:55,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:59:55,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1813612186] [2021-11-23 16:59:55,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:59:55,809 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:59:55,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:59:55,810 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:59:55,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-23 16:59:56,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:59:56,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 16:59:56,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:04,234 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 17:00:04,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:00:04,234 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:00:04,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1813612186] [2021-11-23 17:00:04,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1813612186] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:00:04,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:00:04,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-11-23 17:00:04,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262455235] [2021-11-23 17:00:04,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:00:04,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 17:00:04,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:00:04,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 17:00:04,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-11-23 17:00:04,236 INFO L87 Difference]: Start difference. First operand 27628 states and 39847 transitions. Second operand has 23 states, 23 states have (on average 7.913043478260869) internal successors, (182), 23 states have internal predecessors, (182), 0 states have call successors, (0), 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 17:00:05,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:00:05,737 INFO L93 Difference]: Finished difference Result 37133 states and 54290 transitions. [2021-11-23 17:00:05,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 17:00:05,738 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 7.913043478260869) internal successors, (182), 23 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2021-11-23 17:00:05,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:00:05,777 INFO L225 Difference]: With dead ends: 37133 [2021-11-23 17:00:05,777 INFO L226 Difference]: Without dead ends: 27786 [2021-11-23 17:00:05,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-11-23 17:00:05,795 INFO L933 BasicCegarLoop]: 506 mSDtfsCounter, 133 mSDsluCounter, 5632 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 6138 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 638 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:00:05,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 6138 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 638 Unchecked, 0.1s Time] [2021-11-23 17:00:05,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27786 states. [2021-11-23 17:00:07,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27786 to 27704. [2021-11-23 17:00:07,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27704 states, 27703 states have (on average 1.4416489188896509) internal successors, (39938), 27703 states have internal predecessors, (39938), 0 states have call successors, (0), 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 17:00:07,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27704 states to 27704 states and 39938 transitions. [2021-11-23 17:00:07,504 INFO L78 Accepts]: Start accepts. Automaton has 27704 states and 39938 transitions. Word has length 182 [2021-11-23 17:00:07,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:00:07,504 INFO L470 AbstractCegarLoop]: Abstraction has 27704 states and 39938 transitions. [2021-11-23 17:00:07,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.913043478260869) internal successors, (182), 23 states have internal predecessors, (182), 0 states have call successors, (0), 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 17:00:07,504 INFO L276 IsEmpty]: Start isEmpty. Operand 27704 states and 39938 transitions. [2021-11-23 17:00:07,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-23 17:00:07,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:07,513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:00:07,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:07,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:00:07,713 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:00:07,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:07,714 INFO L85 PathProgramCache]: Analyzing trace with hash 471494993, now seen corresponding path program 1 times [2021-11-23 17:00:07,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:07,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [105855762] [2021-11-23 17:00:07,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:07,714 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:07,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:07,715 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:07,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-23 17:00:07,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:07,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:00:07,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:08,376 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 17:00:08,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:00:08,376 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:00:08,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [105855762] [2021-11-23 17:00:08,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [105855762] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:00:08,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:00:08,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:00:08,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550204747] [2021-11-23 17:00:08,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:00:08,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:00:08,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:00:08,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:00:08,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:00:08,378 INFO L87 Difference]: Start difference. First operand 27704 states and 39938 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 17:00:10,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:00:10,022 INFO L93 Difference]: Finished difference Result 39112 states and 56646 transitions. [2021-11-23 17:00:10,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:00:10,023 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2021-11-23 17:00:10,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:00:10,058 INFO L225 Difference]: With dead ends: 39112 [2021-11-23 17:00:10,058 INFO L226 Difference]: Without dead ends: 27752 [2021-11-23 17:00:10,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:00:10,067 INFO L933 BasicCegarLoop]: 489 mSDtfsCounter, 70 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:00:10,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 1228 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 182 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2021-11-23 17:00:10,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27752 states. [2021-11-23 17:00:11,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27752 to 27704. [2021-11-23 17:00:11,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27704 states, 27703 states have (on average 1.4416128217160595) internal successors, (39937), 27703 states have internal predecessors, (39937), 0 states have call successors, (0), 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 17:00:11,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27704 states to 27704 states and 39937 transitions. [2021-11-23 17:00:11,617 INFO L78 Accepts]: Start accepts. Automaton has 27704 states and 39937 transitions. Word has length 182 [2021-11-23 17:00:11,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:00:11,617 INFO L470 AbstractCegarLoop]: Abstraction has 27704 states and 39937 transitions. [2021-11-23 17:00:11,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 17:00:11,617 INFO L276 IsEmpty]: Start isEmpty. Operand 27704 states and 39937 transitions. [2021-11-23 17:00:11,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-23 17:00:11,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:11,631 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:00:11,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:11,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:00:11,844 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:00:11,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:11,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1822139985, now seen corresponding path program 1 times [2021-11-23 17:00:11,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:11,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [984234049] [2021-11-23 17:00:11,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:11,846 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:11,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:11,846 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:11,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-23 17:00:11,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:11,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:00:11,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:12,424 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 17:00:12,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:00:12,425 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:00:12,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [984234049] [2021-11-23 17:00:12,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [984234049] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:00:12,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:00:12,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:00:12,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134741654] [2021-11-23 17:00:12,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:00:12,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:00:12,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:00:12,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:00:12,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:00:12,427 INFO L87 Difference]: Start difference. First operand 27704 states and 39937 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 17:00:14,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:00:14,117 INFO L93 Difference]: Finished difference Result 39473 states and 57085 transitions. [2021-11-23 17:00:14,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:00:14,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2021-11-23 17:00:14,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:00:14,155 INFO L225 Difference]: With dead ends: 39473 [2021-11-23 17:00:14,155 INFO L226 Difference]: Without dead ends: 27811 [2021-11-23 17:00:14,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:00:14,170 INFO L933 BasicCegarLoop]: 493 mSDtfsCounter, 107 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:00:14,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 1235 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 180 Invalid, 0 Unknown, 29 Unchecked, 0.2s Time] [2021-11-23 17:00:14,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27811 states. [2021-11-23 17:00:15,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27811 to 27730. [2021-11-23 17:00:15,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27730 states, 27729 states have (on average 1.4411987449962134) internal successors, (39963), 27729 states have internal predecessors, (39963), 0 states have call successors, (0), 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 17:00:15,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27730 states to 27730 states and 39963 transitions. [2021-11-23 17:00:15,902 INFO L78 Accepts]: Start accepts. Automaton has 27730 states and 39963 transitions. Word has length 182 [2021-11-23 17:00:15,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:00:15,902 INFO L470 AbstractCegarLoop]: Abstraction has 27730 states and 39963 transitions. [2021-11-23 17:00:15,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 17:00:15,902 INFO L276 IsEmpty]: Start isEmpty. Operand 27730 states and 39963 transitions. [2021-11-23 17:00:15,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-23 17:00:15,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:15,914 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:00:15,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:16,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:00:16,126 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:00:16,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:16,126 INFO L85 PathProgramCache]: Analyzing trace with hash -411356377, now seen corresponding path program 1 times [2021-11-23 17:00:16,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:16,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [345075877] [2021-11-23 17:00:16,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:16,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:16,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:16,128 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:16,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-23 17:00:16,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:16,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:00:16,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:16,531 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 17:00:16,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:00:16,531 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:00:16,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [345075877] [2021-11-23 17:00:16,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [345075877] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:00:16,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:00:16,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:00:16,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973533257] [2021-11-23 17:00:16,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:00:16,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:00:16,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:00:16,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:00:16,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:00:16,533 INFO L87 Difference]: Start difference. First operand 27730 states and 39963 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 17:00:18,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:00:18,137 INFO L93 Difference]: Finished difference Result 47308 states and 68394 transitions. [2021-11-23 17:00:18,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:00:18,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 183 [2021-11-23 17:00:18,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:00:18,181 INFO L225 Difference]: With dead ends: 47308 [2021-11-23 17:00:18,181 INFO L226 Difference]: Without dead ends: 28284 [2021-11-23 17:00:18,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 181 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 17:00:18,199 INFO L933 BasicCegarLoop]: 388 mSDtfsCounter, 386 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:00:18,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 465 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:00:18,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28284 states. [2021-11-23 17:00:19,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28284 to 27730. [2021-11-23 17:00:19,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27730 states, 27729 states have (on average 1.435969562551841) internal successors, (39818), 27729 states have internal predecessors, (39818), 0 states have call successors, (0), 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 17:00:19,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27730 states to 27730 states and 39818 transitions. [2021-11-23 17:00:19,975 INFO L78 Accepts]: Start accepts. Automaton has 27730 states and 39818 transitions. Word has length 183 [2021-11-23 17:00:19,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:00:19,975 INFO L470 AbstractCegarLoop]: Abstraction has 27730 states and 39818 transitions. [2021-11-23 17:00:19,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 17:00:19,975 INFO L276 IsEmpty]: Start isEmpty. Operand 27730 states and 39818 transitions. [2021-11-23 17:00:19,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-23 17:00:19,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:19,984 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:00:19,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:20,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:00:20,185 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:00:20,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:20,185 INFO L85 PathProgramCache]: Analyzing trace with hash 496141550, now seen corresponding path program 1 times [2021-11-23 17:00:20,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:20,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [761296908] [2021-11-23 17:00:20,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:20,186 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:20,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:20,187 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:20,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-23 17:00:20,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:20,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:00:20,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:20,564 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 17:00:20,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:00:20,565 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:00:20,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [761296908] [2021-11-23 17:00:20,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [761296908] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:00:20,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:00:20,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:00:20,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231824754] [2021-11-23 17:00:20,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:00:20,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:00:20,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:00:20,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:00:20,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:00:20,566 INFO L87 Difference]: Start difference. First operand 27730 states and 39818 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 17:00:22,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:00:22,562 INFO L93 Difference]: Finished difference Result 49177 states and 70702 transitions. [2021-11-23 17:00:22,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:00:22,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 183 [2021-11-23 17:00:22,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:00:22,604 INFO L225 Difference]: With dead ends: 49177 [2021-11-23 17:00:22,604 INFO L226 Difference]: Without dead ends: 30032 [2021-11-23 17:00:22,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 181 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 17:00:22,619 INFO L933 BasicCegarLoop]: 397 mSDtfsCounter, 392 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:00:22,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 519 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:00:22,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30032 states. [2021-11-23 17:00:24,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30032 to 27730. [2021-11-23 17:00:24,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27730 states, 27729 states have (on average 1.429802733600202) internal successors, (39647), 27729 states have internal predecessors, (39647), 0 states have call successors, (0), 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 17:00:24,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27730 states to 27730 states and 39647 transitions. [2021-11-23 17:00:24,468 INFO L78 Accepts]: Start accepts. Automaton has 27730 states and 39647 transitions. Word has length 183 [2021-11-23 17:00:24,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:00:24,468 INFO L470 AbstractCegarLoop]: Abstraction has 27730 states and 39647 transitions. [2021-11-23 17:00:24,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 17:00:24,468 INFO L276 IsEmpty]: Start isEmpty. Operand 27730 states and 39647 transitions. [2021-11-23 17:00:24,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-23 17:00:24,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:24,476 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:00:24,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:24,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:00:24,677 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:00:24,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:24,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1912799591, now seen corresponding path program 1 times [2021-11-23 17:00:24,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:24,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1422655786] [2021-11-23 17:00:24,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:24,678 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:24,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:24,679 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:24,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-23 17:00:24,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:24,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:00:24,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:25,033 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 17:00:25,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:00:25,033 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:00:25,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1422655786] [2021-11-23 17:00:25,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1422655786] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:00:25,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:00:25,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:00:25,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284034247] [2021-11-23 17:00:25,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:00:25,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:00:25,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:00:25,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:00:25,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:00:25,034 INFO L87 Difference]: Start difference. First operand 27730 states and 39647 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 17:00:27,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:00:27,136 INFO L93 Difference]: Finished difference Result 51538 states and 73809 transitions. [2021-11-23 17:00:27,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:00:27,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 183 [2021-11-23 17:00:27,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:00:27,178 INFO L225 Difference]: With dead ends: 51538 [2021-11-23 17:00:27,178 INFO L226 Difference]: Without dead ends: 32029 [2021-11-23 17:00:27,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 181 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 17:00:27,193 INFO L933 BasicCegarLoop]: 414 mSDtfsCounter, 395 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:00:27,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 612 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:00:27,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32029 states. [2021-11-23 17:00:29,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32029 to 27547. [2021-11-23 17:00:29,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27547 states, 27546 states have (on average 1.4232919480142308) internal successors, (39206), 27546 states have internal predecessors, (39206), 0 states have call successors, (0), 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 17:00:29,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27547 states to 27547 states and 39206 transitions. [2021-11-23 17:00:29,073 INFO L78 Accepts]: Start accepts. Automaton has 27547 states and 39206 transitions. Word has length 183 [2021-11-23 17:00:29,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:00:29,074 INFO L470 AbstractCegarLoop]: Abstraction has 27547 states and 39206 transitions. [2021-11-23 17:00:29,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 17:00:29,074 INFO L276 IsEmpty]: Start isEmpty. Operand 27547 states and 39206 transitions. [2021-11-23 17:00:29,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-23 17:00:29,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:29,083 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:00:29,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:29,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:00:29,286 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:00:29,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:29,287 INFO L85 PathProgramCache]: Analyzing trace with hash 2005854002, now seen corresponding path program 1 times [2021-11-23 17:00:29,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:29,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [59470515] [2021-11-23 17:00:29,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:29,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:29,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:29,289 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:29,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-23 17:00:29,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:29,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:00:29,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:29,664 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 17:00:29,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:00:29,664 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:00:29,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [59470515] [2021-11-23 17:00:29,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [59470515] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:00:29,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:00:29,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:00:29,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557979689] [2021-11-23 17:00:29,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:00:29,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:00:29,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:00:29,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:00:29,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:00:29,666 INFO L87 Difference]: Start difference. First operand 27547 states and 39206 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 17:00:31,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:00:31,514 INFO L93 Difference]: Finished difference Result 46777 states and 66790 transitions. [2021-11-23 17:00:31,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:00:31,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 183 [2021-11-23 17:00:31,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:00:31,556 INFO L225 Difference]: With dead ends: 46777 [2021-11-23 17:00:31,556 INFO L226 Difference]: Without dead ends: 27782 [2021-11-23 17:00:31,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 181 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 17:00:31,573 INFO L933 BasicCegarLoop]: 386 mSDtfsCounter, 376 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:00:31,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 448 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:00:31,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27782 states. [2021-11-23 17:00:33,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27782 to 27547. [2021-11-23 17:00:33,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27547 states, 27546 states have (on average 1.418028025847673) internal successors, (39061), 27546 states have internal predecessors, (39061), 0 states have call successors, (0), 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 17:00:33,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27547 states to 27547 states and 39061 transitions. [2021-11-23 17:00:33,556 INFO L78 Accepts]: Start accepts. Automaton has 27547 states and 39061 transitions. Word has length 183 [2021-11-23 17:00:33,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:00:33,556 INFO L470 AbstractCegarLoop]: Abstraction has 27547 states and 39061 transitions. [2021-11-23 17:00:33,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 17:00:33,556 INFO L276 IsEmpty]: Start isEmpty. Operand 27547 states and 39061 transitions. [2021-11-23 17:00:33,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-23 17:00:33,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:33,566 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:00:33,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:33,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:00:33,766 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:00:33,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:33,767 INFO L85 PathProgramCache]: Analyzing trace with hash 816924024, now seen corresponding path program 1 times [2021-11-23 17:00:33,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:33,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1242410241] [2021-11-23 17:00:33,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:33,768 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:33,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:33,770 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:33,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-23 17:00:33,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:33,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:00:33,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:34,154 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 17:00:34,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:00:34,154 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:00:34,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1242410241] [2021-11-23 17:00:34,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1242410241] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:00:34,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:00:34,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:00:34,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768404895] [2021-11-23 17:00:34,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:00:34,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:00:34,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:00:34,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:00:34,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:00:34,156 INFO L87 Difference]: Start difference. First operand 27547 states and 39061 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 17:00:36,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:00:36,320 INFO L93 Difference]: Finished difference Result 49399 states and 70089 transitions. [2021-11-23 17:00:36,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:00:36,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 183 [2021-11-23 17:00:36,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:00:36,371 INFO L225 Difference]: With dead ends: 49399 [2021-11-23 17:00:36,371 INFO L226 Difference]: Without dead ends: 30185 [2021-11-23 17:00:36,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 181 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 17:00:36,391 INFO L933 BasicCegarLoop]: 395 mSDtfsCounter, 381 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:00:36,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 533 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:00:36,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30185 states. [2021-11-23 17:00:38,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30185 to 27547. [2021-11-23 17:00:38,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27547 states, 27546 states have (on average 1.4118565308937776) internal successors, (38891), 27546 states have internal predecessors, (38891), 0 states have call successors, (0), 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 17:00:38,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27547 states to 27547 states and 38891 transitions. [2021-11-23 17:00:38,764 INFO L78 Accepts]: Start accepts. Automaton has 27547 states and 38891 transitions. Word has length 183 [2021-11-23 17:00:38,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:00:38,765 INFO L470 AbstractCegarLoop]: Abstraction has 27547 states and 38891 transitions. [2021-11-23 17:00:38,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 17:00:38,765 INFO L276 IsEmpty]: Start isEmpty. Operand 27547 states and 38891 transitions. [2021-11-23 17:00:38,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-23 17:00:38,777 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:38,778 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:00:38,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-11-23 17:00:38,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:00:38,982 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:00:38,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:38,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1085524950, now seen corresponding path program 1 times [2021-11-23 17:00:38,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:38,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060372406] [2021-11-23 17:00:38,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:38,983 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:38,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:38,984 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:38,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-23 17:00:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:39,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:00:39,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:39,369 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 17:00:39,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:00:39,369 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:00:39,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060372406] [2021-11-23 17:00:39,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060372406] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:00:39,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:00:39,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:00:39,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101604464] [2021-11-23 17:00:39,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:00:39,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:00:39,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:00:39,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:00:39,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:00:39,371 INFO L87 Difference]: Start difference. First operand 27547 states and 38891 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 17:00:41,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:00:41,851 INFO L93 Difference]: Finished difference Result 50958 states and 72016 transitions. [2021-11-23 17:00:41,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:00:41,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 183 [2021-11-23 17:00:41,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:00:41,904 INFO L225 Difference]: With dead ends: 50958 [2021-11-23 17:00:41,904 INFO L226 Difference]: Without dead ends: 31523 [2021-11-23 17:00:41,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 181 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 17:00:41,922 INFO L933 BasicCegarLoop]: 398 mSDtfsCounter, 387 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:00:41,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 581 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:00:41,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31523 states. [2021-11-23 17:00:44,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31523 to 27433. [2021-11-23 17:00:44,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27433 states, 27432 states have (on average 1.4047462817147855) internal successors, (38535), 27432 states have internal predecessors, (38535), 0 states have call successors, (0), 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 17:00:44,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27433 states to 27433 states and 38535 transitions. [2021-11-23 17:00:44,330 INFO L78 Accepts]: Start accepts. Automaton has 27433 states and 38535 transitions. Word has length 183 [2021-11-23 17:00:44,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:00:44,330 INFO L470 AbstractCegarLoop]: Abstraction has 27433 states and 38535 transitions. [2021-11-23 17:00:44,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 17:00:44,330 INFO L276 IsEmpty]: Start isEmpty. Operand 27433 states and 38535 transitions. [2021-11-23 17:00:44,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-23 17:00:44,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:44,338 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:00:44,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:44,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:00:44,539 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:00:44,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:44,539 INFO L85 PathProgramCache]: Analyzing trace with hash 8672199, now seen corresponding path program 1 times [2021-11-23 17:00:44,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:44,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1498399710] [2021-11-23 17:00:44,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:44,540 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:44,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:44,541 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:44,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-23 17:00:44,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:44,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:00:44,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:45,133 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 17:00:45,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:00:45,133 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:00:45,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1498399710] [2021-11-23 17:00:45,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1498399710] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:00:45,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:00:45,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:00:45,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769242067] [2021-11-23 17:00:45,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:00:45,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:00:45,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:00:45,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:00:45,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:00:45,136 INFO L87 Difference]: Start difference. First operand 27433 states and 38535 transitions. Second operand has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 0 states have call successors, (0), 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 17:00:47,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:00:47,518 INFO L93 Difference]: Finished difference Result 35068 states and 49243 transitions. [2021-11-23 17:00:47,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:00:47,519 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 0 states have call successors, (0), 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 185 [2021-11-23 17:00:47,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:00:47,561 INFO L225 Difference]: With dead ends: 35068 [2021-11-23 17:00:47,561 INFO L226 Difference]: Without dead ends: 27435 [2021-11-23 17:00:47,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 182 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 17:00:47,570 INFO L933 BasicCegarLoop]: 562 mSDtfsCounter, 1019 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1019 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:00:47,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1019 Valid, 1007 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:00:47,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27435 states. [2021-11-23 17:00:50,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27435 to 27433. [2021-11-23 17:00:50,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27433 states, 27432 states have (on average 1.3981116943715368) internal successors, (38353), 27432 states have internal predecessors, (38353), 0 states have call successors, (0), 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 17:00:50,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27433 states to 27433 states and 38353 transitions. [2021-11-23 17:00:50,186 INFO L78 Accepts]: Start accepts. Automaton has 27433 states and 38353 transitions. Word has length 185 [2021-11-23 17:00:50,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:00:50,186 INFO L470 AbstractCegarLoop]: Abstraction has 27433 states and 38353 transitions. [2021-11-23 17:00:50,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 0 states have call successors, (0), 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 17:00:50,190 INFO L276 IsEmpty]: Start isEmpty. Operand 27433 states and 38353 transitions. [2021-11-23 17:00:50,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-23 17:00:50,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:50,204 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:00:50,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:50,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:00:50,405 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:00:50,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:50,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1653888378, now seen corresponding path program 1 times [2021-11-23 17:00:50,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:50,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1604230626] [2021-11-23 17:00:50,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:50,406 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:50,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:50,407 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:50,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31045fb3-c4ce-49ce-ac1e-76df7857e591/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-23 17:00:50,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:50,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:00:50,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:51,642 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 17:00:51,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:00:51,642 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:00:51,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1604230626] [2021-11-23 17:00:51,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1604230626] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:00:51,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:00:51,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 17:00:51,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813787579] [2021-11-23 17:00:51,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:00:51,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 17:00:51,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:00:51,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 17:00:51,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:00:51,644 INFO L87 Difference]: Start difference. First operand 27433 states and 38353 transitions. Second operand has 10 states, 10 states have (on average 18.5) internal successors, (185), 9 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)