./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb893fd-675a-42bf-9b3a-e2894f11ca45/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb893fd-675a-42bf-9b3a-e2894f11ca45/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb893fd-675a-42bf-9b3a-e2894f11ca45/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb893fd-675a-42bf-9b3a-e2894f11ca45/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb893fd-675a-42bf-9b3a-e2894f11ca45/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb893fd-675a-42bf-9b3a-e2894f11ca45/bin/utaipan-aC7eJsxGYH --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 851dc7d49dcc9fde277beeb190c3ab252014728a3bd4281f423bffd927fb4430 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:42:28,281 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:42:28,284 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:42:28,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:42:28,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:42:28,323 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:42:28,326 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:42:28,329 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:42:28,332 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:42:28,333 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:42:28,335 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:42:28,337 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:42:28,337 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:42:28,339 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:42:28,341 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:42:28,343 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:42:28,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:42:28,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:42:28,349 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:42:28,355 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:42:28,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:42:28,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:42:28,362 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:42:28,363 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:42:28,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:42:28,375 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:42:28,376 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:42:28,382 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:42:28,383 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:42:28,384 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:42:28,385 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:42:28,386 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:42:28,387 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:42:28,388 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:42:28,390 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:42:28,390 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:42:28,391 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:42:28,396 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:42:28,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:42:28,399 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:42:28,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:42:28,401 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb893fd-675a-42bf-9b3a-e2894f11ca45/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:42:28,465 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:42:28,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:42:28,466 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:42:28,466 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:42:28,467 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:42:28,467 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:42:28,467 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:42:28,467 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:42:28,468 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:42:28,471 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:42:28,472 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:42:28,473 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:42:28,473 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:42:28,473 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:42:28,473 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:42:28,474 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:42:28,475 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:42:28,475 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:42:28,475 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:42:28,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:42:28,476 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:42:28,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:42:28,476 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:42:28,477 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:42:28,477 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:42:28,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:42:28,478 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:42:28,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:42:28,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:42:28,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:42:28,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:42:28,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:42:28,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:42:28,481 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:42:28,481 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:42:28,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:42:28,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:42:28,482 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:42:28,482 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:42:28,483 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_ddb893fd-675a-42bf-9b3a-e2894f11ca45/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb893fd-675a-42bf-9b3a-e2894f11ca45/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 851dc7d49dcc9fde277beeb190c3ab252014728a3bd4281f423bffd927fb4430 [2021-11-03 05:42:28,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:42:28,947 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:42:28,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:42:28,953 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:42:28,954 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:42:28,955 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb893fd-675a-42bf-9b3a-e2894f11ca45/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-03 05:42:29,055 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb893fd-675a-42bf-9b3a-e2894f11ca45/bin/utaipan-aC7eJsxGYH/data/c67c50ae1/4907c4c009d64510b275bbc58b8e51a8/FLAG5f334ff42 [2021-11-03 05:42:29,747 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:42:29,750 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb893fd-675a-42bf-9b3a-e2894f11ca45/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-03 05:42:29,770 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb893fd-675a-42bf-9b3a-e2894f11ca45/bin/utaipan-aC7eJsxGYH/data/c67c50ae1/4907c4c009d64510b275bbc58b8e51a8/FLAG5f334ff42 [2021-11-03 05:42:30,051 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb893fd-675a-42bf-9b3a-e2894f11ca45/bin/utaipan-aC7eJsxGYH/data/c67c50ae1/4907c4c009d64510b275bbc58b8e51a8 [2021-11-03 05:42:30,054 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:42:30,056 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:42:30,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:42:30,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:42:30,063 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:42:30,064 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:42:30" (1/1) ... [2021-11-03 05:42:30,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@597008a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:42:30, skipping insertion in model container [2021-11-03 05:42:30,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:42:30" (1/1) ... [2021-11-03 05:42:30,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:42:30,150 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:42:30,509 WARN L228 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_ddb893fd-675a-42bf-9b3a-e2894f11ca45/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9868,9881] [2021-11-03 05:42:30,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:42:30,657 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:42:30,798 WARN L228 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_ddb893fd-675a-42bf-9b3a-e2894f11ca45/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9868,9881] [2021-11-03 05:42:30,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:42:30,915 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:42:30,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:42:30 WrapperNode [2021-11-03 05:42:30,916 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:42:30,918 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:42:30,918 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:42:30,918 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:42:30,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:42:30" (1/1) ... [2021-11-03 05:42:30,970 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:42:30" (1/1) ... [2021-11-03 05:42:31,030 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:42:31,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:42:31,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:42:31,031 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:42:31,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:42:30" (1/1) ... [2021-11-03 05:42:31,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:42:30" (1/1) ... [2021-11-03 05:42:31,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:42:30" (1/1) ... [2021-11-03 05:42:31,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:42:30" (1/1) ... [2021-11-03 05:42:31,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:42:30" (1/1) ... [2021-11-03 05:42:31,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:42:30" (1/1) ... [2021-11-03 05:42:31,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:42:30" (1/1) ... [2021-11-03 05:42:31,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:42:31,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:42:31,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:42:31,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:42:31,153 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:42:30" (1/1) ... [2021-11-03 05:42:31,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:42:31,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb893fd-675a-42bf-9b3a-e2894f11ca45/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:42:31,194 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb893fd-675a-42bf-9b3a-e2894f11ca45/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:42:31,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddb893fd-675a-42bf-9b3a-e2894f11ca45/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:42:31,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:42:31,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 05:42:31,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:42:31,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:42:33,612 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:42:33,613 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-03 05:42:33,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:42:33 BoogieIcfgContainer [2021-11-03 05:42:33,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:42:33,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:42:33,622 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:42:33,627 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:42:33,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:42:30" (1/3) ... [2021-11-03 05:42:33,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bc30dd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:42:33, skipping insertion in model container [2021-11-03 05:42:33,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:42:30" (2/3) ... [2021-11-03 05:42:33,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bc30dd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:42:33, skipping insertion in model container [2021-11-03 05:42:33,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:42:33" (3/3) ... [2021-11-03 05:42:33,632 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-03 05:42:33,639 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:42:33,640 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 05:42:33,711 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:42:33,718 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 [2021-11-03 05:42:33,718 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 05:42:33,743 INFO L276 IsEmpty]: Start isEmpty. Operand has 195 states, 193 states have (on average 1.7098445595854923) internal successors, (330), 194 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:33,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-03 05:42:33,755 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:42:33,756 INFO L513 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] [2021-11-03 05:42:33,757 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:42:33,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:42:33,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1772722671, now seen corresponding path program 1 times [2021-11-03 05:42:33,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:42:33,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101723567] [2021-11-03 05:42:33,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:42:33,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:42:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:42:34,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:42:34,643 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:42:34,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101723567] [2021-11-03 05:42:34,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101723567] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:42:34,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:42:34,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-03 05:42:34,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338603343] [2021-11-03 05:42:34,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:42:34,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:42:34,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:42:34,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:42:34,679 INFO L87 Difference]: Start difference. First operand has 195 states, 193 states have (on average 1.7098445595854923) internal successors, (330), 194 states have internal predecessors, (330), 0 states have call successors, (0), 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 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:35,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:42:35,339 INFO L93 Difference]: Finished difference Result 770 states and 1237 transitions. [2021-11-03 05:42:35,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 05:42:35,342 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-11-03 05:42:35,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:42:35,374 INFO L225 Difference]: With dead ends: 770 [2021-11-03 05:42:35,374 INFO L226 Difference]: Without dead ends: 659 [2021-11-03 05:42:35,378 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:42:35,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-11-03 05:42:35,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 649. [2021-11-03 05:42:35,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 1.4243827160493827) internal successors, (923), 648 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:35,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 923 transitions. [2021-11-03 05:42:35,509 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 923 transitions. Word has length 81 [2021-11-03 05:42:35,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:42:35,510 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 923 transitions. [2021-11-03 05:42:35,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:35,511 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 923 transitions. [2021-11-03 05:42:35,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-03 05:42:35,517 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:42:35,517 INFO L513 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] [2021-11-03 05:42:35,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 05:42:35,518 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:42:35,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:42:35,519 INFO L85 PathProgramCache]: Analyzing trace with hash 230661414, now seen corresponding path program 1 times [2021-11-03 05:42:35,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:42:35,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578736298] [2021-11-03 05:42:35,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:42:35,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:42:35,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:42:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:42:35,685 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:42:35,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578736298] [2021-11-03 05:42:35,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578736298] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:42:35,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:42:35,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:42:35,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62284371] [2021-11-03 05:42:35,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:42:35,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:42:35,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:42:35,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:42:35,690 INFO L87 Difference]: Start difference. First operand 649 states and 923 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:36,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:42:36,171 INFO L93 Difference]: Finished difference Result 1580 states and 2302 transitions. [2021-11-03 05:42:36,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:42:36,173 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-11-03 05:42:36,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:42:36,182 INFO L225 Difference]: With dead ends: 1580 [2021-11-03 05:42:36,182 INFO L226 Difference]: Without dead ends: 981 [2021-11-03 05:42:36,192 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:42:36,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2021-11-03 05:42:36,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 979. [2021-11-03 05:42:36,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 978 states have (on average 1.4519427402862985) internal successors, (1420), 978 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:36,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 1420 transitions. [2021-11-03 05:42:36,330 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 1420 transitions. Word has length 82 [2021-11-03 05:42:36,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:42:36,333 INFO L470 AbstractCegarLoop]: Abstraction has 979 states and 1420 transitions. [2021-11-03 05:42:36,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:36,334 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 1420 transitions. [2021-11-03 05:42:36,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-03 05:42:36,340 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:42:36,341 INFO L513 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] [2021-11-03 05:42:36,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 05:42:36,341 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:42:36,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:42:36,343 INFO L85 PathProgramCache]: Analyzing trace with hash 360098538, now seen corresponding path program 1 times [2021-11-03 05:42:36,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:42:36,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157859345] [2021-11-03 05:42:36,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:42:36,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:42:36,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:42:36,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:42:36,600 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:42:36,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157859345] [2021-11-03 05:42:36,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157859345] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:42:36,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:42:36,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:42:36,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225145] [2021-11-03 05:42:36,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:42:36,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:42:36,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:42:36,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:42:36,603 INFO L87 Difference]: Start difference. First operand 979 states and 1420 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:37,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:42:37,168 INFO L93 Difference]: Finished difference Result 2518 states and 3729 transitions. [2021-11-03 05:42:37,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:42:37,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-11-03 05:42:37,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:42:37,185 INFO L225 Difference]: With dead ends: 2518 [2021-11-03 05:42:37,185 INFO L226 Difference]: Without dead ends: 1695 [2021-11-03 05:42:37,188 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:42:37,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1695 states. [2021-11-03 05:42:37,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1695 to 1693. [2021-11-03 05:42:37,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1693 states, 1692 states have (on average 1.4734042553191489) internal successors, (2493), 1692 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:37,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 2493 transitions. [2021-11-03 05:42:37,462 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 2493 transitions. Word has length 82 [2021-11-03 05:42:37,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:42:37,462 INFO L470 AbstractCegarLoop]: Abstraction has 1693 states and 2493 transitions. [2021-11-03 05:42:37,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:37,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 2493 transitions. [2021-11-03 05:42:37,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-03 05:42:37,466 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:42:37,467 INFO L513 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] [2021-11-03 05:42:37,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 05:42:37,467 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:42:37,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:42:37,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1311537989, now seen corresponding path program 1 times [2021-11-03 05:42:37,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:42:37,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631582757] [2021-11-03 05:42:37,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:42:37,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:42:37,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:42:37,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:42:37,650 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:42:37,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631582757] [2021-11-03 05:42:37,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631582757] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:42:37,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:42:37,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:42:37,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579470426] [2021-11-03 05:42:37,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:42:37,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:42:37,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:42:37,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:42:37,661 INFO L87 Difference]: Start difference. First operand 1693 states and 2493 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:38,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:42:38,341 INFO L93 Difference]: Finished difference Result 4619 states and 6903 transitions. [2021-11-03 05:42:38,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:42:38,341 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-11-03 05:42:38,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:42:38,367 INFO L225 Difference]: With dead ends: 4619 [2021-11-03 05:42:38,367 INFO L226 Difference]: Without dead ends: 3123 [2021-11-03 05:42:38,372 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:42:38,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3123 states. [2021-11-03 05:42:38,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3123 to 3121. [2021-11-03 05:42:38,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3121 states, 3120 states have (on average 1.485897435897436) internal successors, (4636), 3120 states have internal predecessors, (4636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:38,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3121 states to 3121 states and 4636 transitions. [2021-11-03 05:42:38,737 INFO L78 Accepts]: Start accepts. Automaton has 3121 states and 4636 transitions. Word has length 82 [2021-11-03 05:42:38,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:42:38,738 INFO L470 AbstractCegarLoop]: Abstraction has 3121 states and 4636 transitions. [2021-11-03 05:42:38,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:38,739 INFO L276 IsEmpty]: Start isEmpty. Operand 3121 states and 4636 transitions. [2021-11-03 05:42:38,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-03 05:42:38,741 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:42:38,741 INFO L513 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] [2021-11-03 05:42:38,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 05:42:38,742 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:42:38,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:42:38,742 INFO L85 PathProgramCache]: Analyzing trace with hash -691394855, now seen corresponding path program 1 times [2021-11-03 05:42:38,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:42:38,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650476668] [2021-11-03 05:42:38,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:42:38,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:42:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:42:38,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:42:38,836 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:42:38,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650476668] [2021-11-03 05:42:38,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650476668] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:42:38,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:42:38,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:42:38,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982831489] [2021-11-03 05:42:38,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:42:38,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:42:38,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:42:38,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:42:38,840 INFO L87 Difference]: Start difference. First operand 3121 states and 4636 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:39,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:42:39,785 INFO L93 Difference]: Finished difference Result 8981 states and 13442 transitions. [2021-11-03 05:42:39,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:42:39,786 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-11-03 05:42:39,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:42:39,834 INFO L225 Difference]: With dead ends: 8981 [2021-11-03 05:42:39,834 INFO L226 Difference]: Without dead ends: 5979 [2021-11-03 05:42:39,841 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:42:39,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5979 states. [2021-11-03 05:42:40,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5979 to 5977. [2021-11-03 05:42:40,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5977 states, 5976 states have (on average 1.4877844712182062) internal successors, (8891), 5976 states have internal predecessors, (8891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:40,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5977 states to 5977 states and 8891 transitions. [2021-11-03 05:42:40,536 INFO L78 Accepts]: Start accepts. Automaton has 5977 states and 8891 transitions. Word has length 82 [2021-11-03 05:42:40,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:42:40,537 INFO L470 AbstractCegarLoop]: Abstraction has 5977 states and 8891 transitions. [2021-11-03 05:42:40,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:40,538 INFO L276 IsEmpty]: Start isEmpty. Operand 5977 states and 8891 transitions. [2021-11-03 05:42:40,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-03 05:42:40,540 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:42:40,540 INFO L513 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] [2021-11-03 05:42:40,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 05:42:40,541 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:42:40,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:42:40,541 INFO L85 PathProgramCache]: Analyzing trace with hash -911705976, now seen corresponding path program 1 times [2021-11-03 05:42:40,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:42:40,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194923763] [2021-11-03 05:42:40,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:42:40,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:42:40,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:42:40,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:42:40,666 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:42:40,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194923763] [2021-11-03 05:42:40,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194923763] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:42:40,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:42:40,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:42:40,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314840932] [2021-11-03 05:42:40,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:42:40,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:42:40,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:42:40,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:42:40,677 INFO L87 Difference]: Start difference. First operand 5977 states and 8891 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:42,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:42:42,222 INFO L93 Difference]: Finished difference Result 17579 states and 26255 transitions. [2021-11-03 05:42:42,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:42:42,223 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-11-03 05:42:42,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:42:42,305 INFO L225 Difference]: With dead ends: 17579 [2021-11-03 05:42:42,305 INFO L226 Difference]: Without dead ends: 11691 [2021-11-03 05:42:42,321 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:42:42,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11691 states. [2021-11-03 05:42:43,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11691 to 11689. [2021-11-03 05:42:43,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11689 states, 11688 states have (on average 1.4828028747433264) internal successors, (17331), 11688 states have internal predecessors, (17331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:43,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11689 states to 11689 states and 17331 transitions. [2021-11-03 05:42:43,699 INFO L78 Accepts]: Start accepts. Automaton has 11689 states and 17331 transitions. Word has length 82 [2021-11-03 05:42:43,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:42:43,700 INFO L470 AbstractCegarLoop]: Abstraction has 11689 states and 17331 transitions. [2021-11-03 05:42:43,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:43,700 INFO L276 IsEmpty]: Start isEmpty. Operand 11689 states and 17331 transitions. [2021-11-03 05:42:43,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-03 05:42:43,702 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:42:43,703 INFO L513 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] [2021-11-03 05:42:43,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 05:42:43,703 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:42:43,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:42:43,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1677467639, now seen corresponding path program 1 times [2021-11-03 05:42:43,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:42:43,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892890140] [2021-11-03 05:42:43,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:42:43,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:42:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:42:43,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:42:43,837 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:42:43,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892890140] [2021-11-03 05:42:43,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892890140] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:42:43,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:42:43,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:42:43,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444218201] [2021-11-03 05:42:43,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:42:43,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:42:43,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:42:43,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:42:43,843 INFO L87 Difference]: Start difference. First operand 11689 states and 17331 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:45,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:42:45,939 INFO L93 Difference]: Finished difference Result 34738 states and 51612 transitions. [2021-11-03 05:42:45,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:42:45,940 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-11-03 05:42:45,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:42:46,033 INFO L225 Difference]: With dead ends: 34738 [2021-11-03 05:42:46,033 INFO L226 Difference]: Without dead ends: 23115 [2021-11-03 05:42:46,057 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:42:46,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23115 states. [2021-11-03 05:42:48,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23115 to 23113. [2021-11-03 05:42:48,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23113 states, 23112 states have (on average 1.4731741086881274) internal successors, (34048), 23112 states have internal predecessors, (34048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:48,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23113 states to 23113 states and 34048 transitions. [2021-11-03 05:42:48,252 INFO L78 Accepts]: Start accepts. Automaton has 23113 states and 34048 transitions. Word has length 82 [2021-11-03 05:42:48,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:42:48,252 INFO L470 AbstractCegarLoop]: Abstraction has 23113 states and 34048 transitions. [2021-11-03 05:42:48,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:48,253 INFO L276 IsEmpty]: Start isEmpty. Operand 23113 states and 34048 transitions. [2021-11-03 05:42:48,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-03 05:42:48,254 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:42:48,255 INFO L513 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] [2021-11-03 05:42:48,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 05:42:48,255 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:42:48,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:42:48,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1203805347, now seen corresponding path program 1 times [2021-11-03 05:42:48,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:42:48,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24807607] [2021-11-03 05:42:48,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:42:48,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:42:48,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:42:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:42:49,628 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:42:49,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24807607] [2021-11-03 05:42:49,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24807607] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:42:49,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:42:49,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-03 05:42:49,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125739793] [2021-11-03 05:42:49,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-03 05:42:49,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:42:49,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-03 05:42:49,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-11-03 05:42:49,630 INFO L87 Difference]: Start difference. First operand 23113 states and 34048 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:42:56,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:42:56,145 INFO L93 Difference]: Finished difference Result 60969 states and 89689 transitions. [2021-11-03 05:42:56,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-03 05:42:56,146 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-03 05:42:56,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:42:56,347 INFO L225 Difference]: With dead ends: 60969 [2021-11-03 05:42:56,347 INFO L226 Difference]: Without dead ends: 60967 [2021-11-03 05:42:56,368 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2021-11-03 05:42:56,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60967 states. [2021-11-03 05:43:01,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60967 to 45989. [2021-11-03 05:43:01,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45989 states, 45988 states have (on average 1.4672740714969121) internal successors, (67477), 45988 states have internal predecessors, (67477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:01,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45989 states to 45989 states and 67477 transitions. [2021-11-03 05:43:01,478 INFO L78 Accepts]: Start accepts. Automaton has 45989 states and 67477 transitions. Word has length 83 [2021-11-03 05:43:01,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:43:01,479 INFO L470 AbstractCegarLoop]: Abstraction has 45989 states and 67477 transitions. [2021-11-03 05:43:01,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:01,480 INFO L276 IsEmpty]: Start isEmpty. Operand 45989 states and 67477 transitions. [2021-11-03 05:43:01,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-03 05:43:01,482 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:43:01,482 INFO L513 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] [2021-11-03 05:43:01,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 05:43:01,483 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:43:01,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:43:01,484 INFO L85 PathProgramCache]: Analyzing trace with hash -249302051, now seen corresponding path program 1 times [2021-11-03 05:43:01,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:43:01,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084280155] [2021-11-03 05:43:01,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:43:01,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:43:01,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:43:02,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:43:02,700 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:43:02,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084280155] [2021-11-03 05:43:02,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084280155] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:43:02,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:43:02,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-03 05:43:02,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179620786] [2021-11-03 05:43:02,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-03 05:43:02,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:43:02,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-03 05:43:02,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-11-03 05:43:02,708 INFO L87 Difference]: Start difference. First operand 45989 states and 67477 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:08,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:43:08,961 INFO L93 Difference]: Finished difference Result 58835 states and 86115 transitions. [2021-11-03 05:43:08,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-03 05:43:08,964 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-03 05:43:08,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:43:09,109 INFO L225 Difference]: With dead ends: 58835 [2021-11-03 05:43:09,110 INFO L226 Difference]: Without dead ends: 54033 [2021-11-03 05:43:09,132 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=183, Invalid=687, Unknown=0, NotChecked=0, Total=870 [2021-11-03 05:43:09,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54033 states. [2021-11-03 05:43:14,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54033 to 50437. [2021-11-03 05:43:14,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50437 states, 50436 states have (on average 1.4652629074470616) internal successors, (73902), 50436 states have internal predecessors, (73902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:14,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50437 states to 50437 states and 73902 transitions. [2021-11-03 05:43:14,261 INFO L78 Accepts]: Start accepts. Automaton has 50437 states and 73902 transitions. Word has length 83 [2021-11-03 05:43:14,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:43:14,262 INFO L470 AbstractCegarLoop]: Abstraction has 50437 states and 73902 transitions. [2021-11-03 05:43:14,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:14,263 INFO L276 IsEmpty]: Start isEmpty. Operand 50437 states and 73902 transitions. [2021-11-03 05:43:14,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-03 05:43:14,268 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:43:14,268 INFO L513 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] [2021-11-03 05:43:14,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-03 05:43:14,269 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:43:14,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:43:14,269 INFO L85 PathProgramCache]: Analyzing trace with hash 941319165, now seen corresponding path program 1 times [2021-11-03 05:43:14,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:43:14,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121994510] [2021-11-03 05:43:14,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:43:14,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:43:14,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:43:15,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:43:15,439 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:43:15,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121994510] [2021-11-03 05:43:15,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121994510] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:43:15,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:43:15,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-03 05:43:15,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345944352] [2021-11-03 05:43:15,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-03 05:43:15,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:43:15,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-03 05:43:15,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-11-03 05:43:15,443 INFO L87 Difference]: Start difference. First operand 50437 states and 73902 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:21,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:43:21,964 INFO L93 Difference]: Finished difference Result 58330 states and 85272 transitions. [2021-11-03 05:43:21,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-03 05:43:21,965 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-03 05:43:21,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:43:22,080 INFO L225 Difference]: With dead ends: 58330 [2021-11-03 05:43:22,081 INFO L226 Difference]: Without dead ends: 58328 [2021-11-03 05:43:22,100 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2021-11-03 05:43:22,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58328 states. [2021-11-03 05:43:26,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58328 to 50456. [2021-11-03 05:43:26,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50456 states, 50455 states have (on average 1.4651273411951244) internal successors, (73923), 50455 states have internal predecessors, (73923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:26,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50456 states to 50456 states and 73923 transitions. [2021-11-03 05:43:26,985 INFO L78 Accepts]: Start accepts. Automaton has 50456 states and 73923 transitions. Word has length 83 [2021-11-03 05:43:26,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:43:26,986 INFO L470 AbstractCegarLoop]: Abstraction has 50456 states and 73923 transitions. [2021-11-03 05:43:26,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:26,987 INFO L276 IsEmpty]: Start isEmpty. Operand 50456 states and 73923 transitions. [2021-11-03 05:43:26,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-03 05:43:26,993 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:43:26,994 INFO L513 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] [2021-11-03 05:43:26,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-03 05:43:26,995 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:43:26,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:43:26,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1967274941, now seen corresponding path program 1 times [2021-11-03 05:43:26,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:43:26,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490124785] [2021-11-03 05:43:26,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:43:27,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:43:27,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:43:28,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:43:28,156 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:43:28,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490124785] [2021-11-03 05:43:28,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490124785] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:43:28,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:43:28,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-03 05:43:28,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350436832] [2021-11-03 05:43:28,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-03 05:43:28,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:43:28,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-03 05:43:28,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-11-03 05:43:28,160 INFO L87 Difference]: Start difference. First operand 50456 states and 73923 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:43:35,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:43:35,211 INFO L93 Difference]: Finished difference Result 69189 states and 101222 transitions. [2021-11-03 05:43:35,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-03 05:43:35,211 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-03 05:43:35,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:43:35,345 INFO L225 Difference]: With dead ends: 69189 [2021-11-03 05:43:35,345 INFO L226 Difference]: Without dead ends: 69187 [2021-11-03 05:43:35,359 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2021-11-03 05:43:35,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69187 states.