./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/psyco/psyco_net_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca79b70-af96-443d-a020-16e1880222f7/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca79b70-af96-443d-a020-16e1880222f7/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca79b70-af96-443d-a020-16e1880222f7/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca79b70-af96-443d-a020-16e1880222f7/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/psyco/psyco_net_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca79b70-af96-443d-a020-16e1880222f7/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca79b70-af96-443d-a020-16e1880222f7/bin/utaipan-eEHZpOm5b7 --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 de2f4457e683c9057510f44fdcfcada297661f8afdeccfe707ab5df57f434b62 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:41:16,123 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:41:16,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:41:16,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:41:16,200 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:41:16,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:41:16,210 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:41:16,216 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:41:16,218 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:41:16,226 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:41:16,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:41:16,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:41:16,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:41:16,233 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:41:16,235 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:41:16,238 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:41:16,240 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:41:16,241 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:41:16,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:41:16,257 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:41:16,260 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:41:16,261 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:41:16,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:41:16,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:41:16,272 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:41:16,272 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:41:16,273 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:41:16,275 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:41:16,276 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:41:16,277 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:41:16,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:41:16,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:41:16,281 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:41:16,281 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:41:16,282 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:41:16,282 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:41:16,283 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:41:16,283 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:41:16,284 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:41:16,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:41:16,285 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:41:16,286 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca79b70-af96-443d-a020-16e1880222f7/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:41:16,312 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:41:16,312 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:41:16,313 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:41:16,313 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:41:16,313 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:41:16,314 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:41:16,314 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:41:16,314 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:41:16,314 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:41:16,314 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:41:16,315 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:41:16,315 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:41:16,315 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:41:16,315 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:41:16,315 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:41:16,316 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:41:16,316 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:41:16,316 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:41:16,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:41:16,317 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:41:16,317 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:41:16,317 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:41:16,317 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:41:16,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:41:16,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:41:16,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:41:16,318 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:41:16,318 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:41:16,319 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:41:16,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:41:16,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:41:16,319 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:41:16,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:41:16,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:41:16,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:41:16,320 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:41:16,320 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:41:16,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:41:16,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:41:16,321 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:41:16,321 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:41:16,321 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_3ca79b70-af96-443d-a020-16e1880222f7/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca79b70-af96-443d-a020-16e1880222f7/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de2f4457e683c9057510f44fdcfcada297661f8afdeccfe707ab5df57f434b62 [2021-11-25 19:41:16,596 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:41:16,618 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:41:16,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:41:16,622 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:41:16,623 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:41:16,624 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca79b70-af96-443d-a020-16e1880222f7/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/psyco/psyco_net_1.c [2021-11-25 19:41:16,711 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca79b70-af96-443d-a020-16e1880222f7/bin/utaipan-eEHZpOm5b7/data/c619e3013/2123f73763404a6daa8ad510bf2c731b/FLAG907ca73be [2021-11-25 19:41:17,932 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:41:17,933 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca79b70-af96-443d-a020-16e1880222f7/sv-benchmarks/c/psyco/psyco_net_1.c [2021-11-25 19:41:18,097 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca79b70-af96-443d-a020-16e1880222f7/bin/utaipan-eEHZpOm5b7/data/c619e3013/2123f73763404a6daa8ad510bf2c731b/FLAG907ca73be [2021-11-25 19:41:18,533 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca79b70-af96-443d-a020-16e1880222f7/bin/utaipan-eEHZpOm5b7/data/c619e3013/2123f73763404a6daa8ad510bf2c731b [2021-11-25 19:41:18,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:41:18,581 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:41:18,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:41:18,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:41:18,588 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:41:18,590 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:41:18" (1/1) ... [2021-11-25 19:41:18,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@173be977 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:18, skipping insertion in model container [2021-11-25 19:41:18,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:41:18" (1/1) ... [2021-11-25 19:41:18,599 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:41:19,070 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:41:20,838 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca79b70-af96-443d-a020-16e1880222f7/sv-benchmarks/c/psyco/psyco_net_1.c[2349407,2349420] [2021-11-25 19:41:20,893 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:41:20,910 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:41:22,205 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca79b70-af96-443d-a020-16e1880222f7/sv-benchmarks/c/psyco/psyco_net_1.c[2349407,2349420] [2021-11-25 19:41:22,231 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:41:22,250 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:41:22,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:22 WrapperNode [2021-11-25 19:41:22,250 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:41:22,252 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:41:22,252 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:41:22,252 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:41:22,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:22" (1/1) ... [2021-11-25 19:41:22,456 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:22" (1/1) ... [2021-11-25 19:41:23,536 INFO L137 Inliner]: procedures = 12, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 50075 [2021-11-25 19:41:23,543 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:41:23,544 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:41:23,544 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:41:23,545 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:41:23,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:22" (1/1) ... [2021-11-25 19:41:23,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:22" (1/1) ... [2021-11-25 19:41:23,818 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:22" (1/1) ... [2021-11-25 19:41:23,818 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:22" (1/1) ... [2021-11-25 19:41:24,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:22" (1/1) ... [2021-11-25 19:41:24,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:22" (1/1) ... [2021-11-25 19:41:24,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:22" (1/1) ... [2021-11-25 19:41:25,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:41:25,210 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:41:25,210 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:41:25,210 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:41:25,211 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:22" (1/1) ... [2021-11-25 19:41:25,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:41:25,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca79b70-af96-443d-a020-16e1880222f7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:41:25,247 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca79b70-af96-443d-a020-16e1880222f7/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:41:25,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca79b70-af96-443d-a020-16e1880222f7/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:41:25,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:41:25,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:41:25,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:41:25,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:41:25,958 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:41:25,960 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:41:39,917 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:41:40,093 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:41:40,094 INFO L301 CfgBuilder]: Removed 1130 assume(true) statements. [2021-11-25 19:41:40,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:41:40 BoogieIcfgContainer [2021-11-25 19:41:40,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:41:40,217 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:41:40,217 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:41:40,227 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:41:40,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:41:18" (1/3) ... [2021-11-25 19:41:40,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1247c1ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:41:40, skipping insertion in model container [2021-11-25 19:41:40,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:22" (2/3) ... [2021-11-25 19:41:40,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1247c1ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:41:40, skipping insertion in model container [2021-11-25 19:41:40,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:41:40" (3/3) ... [2021-11-25 19:41:40,241 INFO L111 eAbstractionObserver]: Analyzing ICFG psyco_net_1.c [2021-11-25 19:41:40,246 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:41:40,246 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:41:40,347 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:41:40,361 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 [2021-11-25 19:41:40,361 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:41:40,536 INFO L276 IsEmpty]: Start isEmpty. Operand has 9209 states, 9207 states have (on average 1.9996741609644835) internal successors, (18411), 9208 states have internal predecessors, (18411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:40,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 19:41:40,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:40,552 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:41:40,553 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:41:40,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:40,559 INFO L85 PathProgramCache]: Analyzing trace with hash 182211473, now seen corresponding path program 1 times [2021-11-25 19:41:40,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:40,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234397716] [2021-11-25 19:41:40,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:40,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:40,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:40,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:41:40,968 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:40,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234397716] [2021-11-25 19:41:40,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234397716] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:41:40,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:41:40,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:41:40,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902313582] [2021-11-25 19:41:40,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:41:40,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 19:41:40,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:41,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 19:41:41,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 19:41:41,073 INFO L87 Difference]: Start difference. First operand has 9209 states, 9207 states have (on average 1.9996741609644835) internal successors, (18411), 9208 states have internal predecessors, (18411), 0 states have call successors, (0), 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 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:41,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:41:41,494 INFO L93 Difference]: Finished difference Result 17695 states and 35377 transitions. [2021-11-25 19:41:41,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 19:41:41,496 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-25 19:41:41,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:41:41,584 INFO L225 Difference]: With dead ends: 17695 [2021-11-25 19:41:41,584 INFO L226 Difference]: Without dead ends: 8279 [2021-11-25 19:41:41,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 19:41:41,612 INFO L933 BasicCegarLoop]: 14143 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14143 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:41:41,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14143 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:41:41,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8279 states. [2021-11-25 19:41:41,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8279 to 8279. [2021-11-25 19:41:41,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8279 states, 8278 states have (on average 1.5699444310219859) internal successors, (12996), 8278 states have internal predecessors, (12996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:41,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8279 states to 8279 states and 12996 transitions. [2021-11-25 19:41:41,929 INFO L78 Accepts]: Start accepts. Automaton has 8279 states and 12996 transitions. Word has length 8 [2021-11-25 19:41:41,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:41:41,929 INFO L470 AbstractCegarLoop]: Abstraction has 8279 states and 12996 transitions. [2021-11-25 19:41:41,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:41,930 INFO L276 IsEmpty]: Start isEmpty. Operand 8279 states and 12996 transitions. [2021-11-25 19:41:41,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 19:41:41,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:41,931 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:41:41,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:41:41,932 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:41:41,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:41,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1884649833, now seen corresponding path program 1 times [2021-11-25 19:41:41,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:41,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840118008] [2021-11-25 19:41:41,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:41,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:42,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:42,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:41:42,099 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:42,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840118008] [2021-11-25 19:41:42,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840118008] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:41:42,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:41:42,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:41:42,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962159801] [2021-11-25 19:41:42,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:41:42,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:41:42,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:42,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:41:42,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:41:42,105 INFO L87 Difference]: Start difference. First operand 8279 states and 12996 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:44,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:41:44,241 INFO L93 Difference]: Finished difference Result 16560 states and 25995 transitions. [2021-11-25 19:41:44,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:41:44,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-25 19:41:44,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:41:44,290 INFO L225 Difference]: With dead ends: 16560 [2021-11-25 19:41:44,291 INFO L226 Difference]: Without dead ends: 8282 [2021-11-25 19:41:44,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:41:44,302 INFO L933 BasicCegarLoop]: 12994 mSDtfsCounter, 4 mSDsluCounter, 11519 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 24513 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:41:44,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 24513 Invalid, 1475 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1474 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-25 19:41:44,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8282 states. [2021-11-25 19:41:44,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8282 to 8282. [2021-11-25 19:41:44,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8282 states, 8281 states have (on average 1.569737954353339) internal successors, (12999), 8281 states have internal predecessors, (12999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:44,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8282 states to 8282 states and 12999 transitions. [2021-11-25 19:41:44,506 INFO L78 Accepts]: Start accepts. Automaton has 8282 states and 12999 transitions. Word has length 9 [2021-11-25 19:41:44,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:41:44,507 INFO L470 AbstractCegarLoop]: Abstraction has 8282 states and 12999 transitions. [2021-11-25 19:41:44,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:44,508 INFO L276 IsEmpty]: Start isEmpty. Operand 8282 states and 12999 transitions. [2021-11-25 19:41:44,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 19:41:44,509 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:44,509 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:41:44,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:41:44,510 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:41:44,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:44,510 INFO L85 PathProgramCache]: Analyzing trace with hash 897026676, now seen corresponding path program 1 times [2021-11-25 19:41:44,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:44,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048217237] [2021-11-25 19:41:44,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:44,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:41:44,644 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:44,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048217237] [2021-11-25 19:41:44,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048217237] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:41:44,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:41:44,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:41:44,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291328605] [2021-11-25 19:41:44,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:41:44,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:41:44,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:44,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:41:44,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:41:44,649 INFO L87 Difference]: Start difference. First operand 8282 states and 12999 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:46,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:41:46,529 INFO L93 Difference]: Finished difference Result 16568 states and 26004 transitions. [2021-11-25 19:41:46,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:41:46,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-25 19:41:46,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:41:46,592 INFO L225 Difference]: With dead ends: 16568 [2021-11-25 19:41:46,593 INFO L226 Difference]: Without dead ends: 8288 [2021-11-25 19:41:46,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:41:46,610 INFO L933 BasicCegarLoop]: 12993 mSDtfsCounter, 329 mSDsluCounter, 11196 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 24189 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:41:46,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 24189 Invalid, 1479 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [36 Valid, 1443 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-25 19:41:46,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8288 states. [2021-11-25 19:41:46,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8288 to 8286. [2021-11-25 19:41:46,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8286 states, 8285 states have (on average 1.5694628847314425) internal successors, (13003), 8285 states have internal predecessors, (13003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:46,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8286 states to 8286 states and 13003 transitions. [2021-11-25 19:41:46,812 INFO L78 Accepts]: Start accepts. Automaton has 8286 states and 13003 transitions. Word has length 14 [2021-11-25 19:41:46,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:41:46,813 INFO L470 AbstractCegarLoop]: Abstraction has 8286 states and 13003 transitions. [2021-11-25 19:41:46,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:46,813 INFO L276 IsEmpty]: Start isEmpty. Operand 8286 states and 13003 transitions. [2021-11-25 19:41:46,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 19:41:46,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:46,815 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:41:46,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:41:46,816 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:41:46,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:46,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1409738145, now seen corresponding path program 1 times [2021-11-25 19:41:46,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:46,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869534123] [2021-11-25 19:41:46,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:46,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:46,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:46,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:41:46,926 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:46,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869534123] [2021-11-25 19:41:46,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869534123] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:41:46,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:41:46,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:41:46,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988401728] [2021-11-25 19:41:46,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:41:46,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:41:46,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:46,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:41:46,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:41:46,929 INFO L87 Difference]: Start difference. First operand 8286 states and 13003 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:50,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:41:50,337 INFO L93 Difference]: Finished difference Result 16490 states and 25884 transitions. [2021-11-25 19:41:50,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:41:50,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-25 19:41:50,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:41:50,365 INFO L225 Difference]: With dead ends: 16490 [2021-11-25 19:41:50,366 INFO L226 Difference]: Without dead ends: 8164 [2021-11-25 19:41:50,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:41:50,378 INFO L933 BasicCegarLoop]: 9996 mSDtfsCounter, 11116 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2419 mSolverCounterSat, 1749 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11116 SdHoareTripleChecker+Valid, 9996 SdHoareTripleChecker+Invalid, 4168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1749 IncrementalHoareTripleChecker+Valid, 2419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:41:50,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11116 Valid, 9996 Invalid, 4168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1749 Valid, 2419 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-25 19:41:50,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8164 states. [2021-11-25 19:41:50,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8164 to 8164. [2021-11-25 19:41:50,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8164 states, 8163 states have (on average 1.516599289476908) internal successors, (12380), 8163 states have internal predecessors, (12380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:50,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8164 states to 8164 states and 12380 transitions. [2021-11-25 19:41:50,598 INFO L78 Accepts]: Start accepts. Automaton has 8164 states and 12380 transitions. Word has length 18 [2021-11-25 19:41:50,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:41:50,599 INFO L470 AbstractCegarLoop]: Abstraction has 8164 states and 12380 transitions. [2021-11-25 19:41:50,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:50,599 INFO L276 IsEmpty]: Start isEmpty. Operand 8164 states and 12380 transitions. [2021-11-25 19:41:50,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 19:41:50,601 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:50,601 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:41:50,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:41:50,601 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:41:50,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:50,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1096116993, now seen corresponding path program 1 times [2021-11-25 19:41:50,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:50,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480432155] [2021-11-25 19:41:50,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:50,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:50,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:50,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:41:50,708 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:50,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480432155] [2021-11-25 19:41:50,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480432155] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:41:50,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:41:50,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:41:50,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872799561] [2021-11-25 19:41:50,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:41:50,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:41:50,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:50,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:41:50,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:41:50,712 INFO L87 Difference]: Start difference. First operand 8164 states and 12380 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:53,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:41:53,916 INFO L93 Difference]: Finished difference Result 24488 states and 37136 transitions. [2021-11-25 19:41:53,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:41:53,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-11-25 19:41:53,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:41:53,964 INFO L225 Difference]: With dead ends: 24488 [2021-11-25 19:41:53,965 INFO L226 Difference]: Without dead ends: 16276 [2021-11-25 19:41:53,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:41:53,981 INFO L933 BasicCegarLoop]: 10922 mSDtfsCounter, 11045 mSDsluCounter, 10880 mSDsCounter, 0 mSdLazyCounter, 2812 mSolverCounterSat, 1427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11045 SdHoareTripleChecker+Valid, 21802 SdHoareTripleChecker+Invalid, 4239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1427 IncrementalHoareTripleChecker+Valid, 2812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:41:53,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11045 Valid, 21802 Invalid, 4239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1427 Valid, 2812 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-25 19:41:54,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16276 states. [2021-11-25 19:41:54,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16276 to 14962. [2021-11-25 19:41:54,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14962 states, 14961 states have (on average 1.5566472829356326) internal successors, (23289), 14961 states have internal predecessors, (23289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:54,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14962 states to 14962 states and 23289 transitions. [2021-11-25 19:41:54,330 INFO L78 Accepts]: Start accepts. Automaton has 14962 states and 23289 transitions. Word has length 22 [2021-11-25 19:41:54,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:41:54,331 INFO L470 AbstractCegarLoop]: Abstraction has 14962 states and 23289 transitions. [2021-11-25 19:41:54,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:54,331 INFO L276 IsEmpty]: Start isEmpty. Operand 14962 states and 23289 transitions. [2021-11-25 19:41:54,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 19:41:54,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:54,340 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:41:54,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 19:41:54,341 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:41:54,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:54,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1423449426, now seen corresponding path program 1 times [2021-11-25 19:41:54,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:54,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897202234] [2021-11-25 19:41:54,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:54,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:54,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:41:54,454 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:54,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897202234] [2021-11-25 19:41:54,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897202234] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:41:54,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:41:54,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:41:54,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561479574] [2021-11-25 19:41:54,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:41:54,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:41:54,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:54,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:41:54,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:41:54,457 INFO L87 Difference]: Start difference. First operand 14962 states and 23289 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:58,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:41:58,793 INFO L93 Difference]: Finished difference Result 37762 states and 58559 transitions. [2021-11-25 19:41:58,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:41:58,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2021-11-25 19:41:58,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:41:58,859 INFO L225 Difference]: With dead ends: 37762 [2021-11-25 19:41:58,859 INFO L226 Difference]: Without dead ends: 22520 [2021-11-25 19:41:58,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:41:58,882 INFO L933 BasicCegarLoop]: 10500 mSDtfsCounter, 10474 mSDsluCounter, 9628 mSDsCounter, 0 mSdLazyCounter, 4456 mSolverCounterSat, 1487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10474 SdHoareTripleChecker+Valid, 20128 SdHoareTripleChecker+Invalid, 5943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1487 IncrementalHoareTripleChecker+Valid, 4456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:41:58,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10474 Valid, 20128 Invalid, 5943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1487 Valid, 4456 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-25 19:41:58,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22520 states. [2021-11-25 19:41:59,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22520 to 21280. [2021-11-25 19:41:59,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21280 states, 21279 states have (on average 1.5519056346632831) internal successors, (33023), 21279 states have internal predecessors, (33023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:59,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21280 states to 21280 states and 33023 transitions. [2021-11-25 19:41:59,393 INFO L78 Accepts]: Start accepts. Automaton has 21280 states and 33023 transitions. Word has length 24 [2021-11-25 19:41:59,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:41:59,393 INFO L470 AbstractCegarLoop]: Abstraction has 21280 states and 33023 transitions. [2021-11-25 19:41:59,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:59,394 INFO L276 IsEmpty]: Start isEmpty. Operand 21280 states and 33023 transitions. [2021-11-25 19:41:59,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-25 19:41:59,399 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:59,400 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:41:59,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 19:41:59,401 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:41:59,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:59,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1092028023, now seen corresponding path program 1 times [2021-11-25 19:41:59,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:59,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074112557] [2021-11-25 19:41:59,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:59,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:59,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:59,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:41:59,515 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:59,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074112557] [2021-11-25 19:41:59,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074112557] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:41:59,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:41:59,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:41:59,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460512043] [2021-11-25 19:41:59,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:41:59,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:41:59,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:59,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:41:59,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:41:59,518 INFO L87 Difference]: Start difference. First operand 21280 states and 33023 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:42:04,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:42:04,583 INFO L93 Difference]: Finished difference Result 63806 states and 99005 transitions. [2021-11-25 19:42:04,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:42:04,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-25 19:42:04,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:42:04,768 INFO L225 Difference]: With dead ends: 63806 [2021-11-25 19:42:04,769 INFO L226 Difference]: Without dead ends: 42528 [2021-11-25 19:42:04,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:42:04,802 INFO L933 BasicCegarLoop]: 21588 mSDtfsCounter, 11013 mSDsluCounter, 9572 mSDsCounter, 0 mSdLazyCounter, 5598 mSolverCounterSat, 1148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11013 SdHoareTripleChecker+Valid, 31160 SdHoareTripleChecker+Invalid, 6746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1148 IncrementalHoareTripleChecker+Valid, 5598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:42:04,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11013 Valid, 31160 Invalid, 6746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1148 Valid, 5598 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-25 19:42:04,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42528 states. [2021-11-25 19:42:05,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42528 to 40444. [2021-11-25 19:42:05,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40444 states, 40443 states have (on average 1.5746606334841629) internal successors, (63684), 40443 states have internal predecessors, (63684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:42:05,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40444 states to 40444 states and 63684 transitions. [2021-11-25 19:42:05,526 INFO L78 Accepts]: Start accepts. Automaton has 40444 states and 63684 transitions. Word has length 29 [2021-11-25 19:42:05,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:42:05,526 INFO L470 AbstractCegarLoop]: Abstraction has 40444 states and 63684 transitions. [2021-11-25 19:42:05,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:42:05,527 INFO L276 IsEmpty]: Start isEmpty. Operand 40444 states and 63684 transitions. [2021-11-25 19:42:05,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-25 19:42:05,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:42:05,530 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:42:05,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 19:42:05,530 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:42:05,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:42:05,531 INFO L85 PathProgramCache]: Analyzing trace with hash -197265190, now seen corresponding path program 1 times [2021-11-25 19:42:05,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:42:05,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913639469] [2021-11-25 19:42:05,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:42:05,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:42:05,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:42:05,638 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:42:05,638 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:42:05,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913639469] [2021-11-25 19:42:05,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913639469] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:42:05,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:42:05,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:42:05,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032565213] [2021-11-25 19:42:05,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:42:05,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:42:05,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:42:05,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:42:05,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:42:05,641 INFO L87 Difference]: Start difference. First operand 40444 states and 63684 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:42:07,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:42:07,136 INFO L93 Difference]: Finished difference Result 80918 states and 127421 transitions. [2021-11-25 19:42:07,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:42:07,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-25 19:42:07,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:42:07,208 INFO L225 Difference]: With dead ends: 80918 [2021-11-25 19:42:07,208 INFO L226 Difference]: Without dead ends: 40476 [2021-11-25 19:42:07,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:42:07,241 INFO L933 BasicCegarLoop]: 12340 mSDtfsCounter, 305 mSDsluCounter, 10698 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 23038 SdHoareTripleChecker+Invalid, 1349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:42:07,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 23038 Invalid, 1349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1309 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-25 19:42:07,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40476 states. [2021-11-25 19:42:07,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40476 to 40474. [2021-11-25 19:42:07,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40474 states, 40473 states have (on average 1.5742346749684974) internal successors, (63714), 40473 states have internal predecessors, (63714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:42:08,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40474 states to 40474 states and 63714 transitions. [2021-11-25 19:42:08,017 INFO L78 Accepts]: Start accepts. Automaton has 40474 states and 63714 transitions. Word has length 35 [2021-11-25 19:42:08,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:42:08,018 INFO L470 AbstractCegarLoop]: Abstraction has 40474 states and 63714 transitions. [2021-11-25 19:42:08,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:42:08,018 INFO L276 IsEmpty]: Start isEmpty. Operand 40474 states and 63714 transitions. [2021-11-25 19:42:08,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-25 19:42:08,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:42:08,020 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:42:08,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 19:42:08,020 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:42:08,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:42:08,021 INFO L85 PathProgramCache]: Analyzing trace with hash -504887773, now seen corresponding path program 1 times [2021-11-25 19:42:08,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:42:08,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51106918] [2021-11-25 19:42:08,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:42:08,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:42:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:42:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:42:08,111 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:42:08,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51106918] [2021-11-25 19:42:08,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51106918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:42:08,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:42:08,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:42:08,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415006850] [2021-11-25 19:42:08,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:42:08,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:42:08,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:42:08,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:42:08,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:42:08,114 INFO L87 Difference]: Start difference. First operand 40474 states and 63714 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:42:11,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:42:11,303 INFO L93 Difference]: Finished difference Result 109022 states and 171832 transitions. [2021-11-25 19:42:11,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:42:11,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-25 19:42:11,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:42:11,395 INFO L225 Difference]: With dead ends: 109022 [2021-11-25 19:42:11,396 INFO L226 Difference]: Without dead ends: 68500 [2021-11-25 19:42:11,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:42:11,434 INFO L933 BasicCegarLoop]: 10922 mSDtfsCounter, 11029 mSDsluCounter, 10880 mSDsCounter, 0 mSdLazyCounter, 2748 mSolverCounterSat, 1395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11029 SdHoareTripleChecker+Valid, 21802 SdHoareTripleChecker+Invalid, 4143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1395 IncrementalHoareTripleChecker+Valid, 2748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:42:11,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11029 Valid, 21802 Invalid, 4143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1395 Valid, 2748 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-25 19:42:11,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68500 states. [2021-11-25 19:42:12,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68500 to 66770. [2021-11-25 19:42:12,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66770 states, 66769 states have (on average 1.585136814988992) internal successors, (105838), 66769 states have internal predecessors, (105838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:42:12,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66770 states to 66770 states and 105838 transitions. [2021-11-25 19:42:12,646 INFO L78 Accepts]: Start accepts. Automaton has 66770 states and 105838 transitions. Word has length 38 [2021-11-25 19:42:12,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:42:12,647 INFO L470 AbstractCegarLoop]: Abstraction has 66770 states and 105838 transitions. [2021-11-25 19:42:12,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:42:12,647 INFO L276 IsEmpty]: Start isEmpty. Operand 66770 states and 105838 transitions. [2021-11-25 19:42:12,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 19:42:12,649 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:42:12,649 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:42:12,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 19:42:12,649 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:42:12,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:42:12,650 INFO L85 PathProgramCache]: Analyzing trace with hash 2095911498, now seen corresponding path program 1 times [2021-11-25 19:42:12,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:42:12,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030371522] [2021-11-25 19:42:12,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:42:12,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:42:12,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:42:12,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:42:12,771 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:42:12,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030371522] [2021-11-25 19:42:12,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030371522] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:42:12,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:42:12,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:42:12,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204837962] [2021-11-25 19:42:12,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:42:12,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:42:12,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:42:12,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:42:12,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:42:12,774 INFO L87 Difference]: Start difference. First operand 66770 states and 105838 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:42:14,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:42:14,323 INFO L93 Difference]: Finished difference Result 129326 states and 204979 transitions. [2021-11-25 19:42:14,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:42:14,323 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 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 45 [2021-11-25 19:42:14,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:42:14,411 INFO L225 Difference]: With dead ends: 129326 [2021-11-25 19:42:14,412 INFO L226 Difference]: Without dead ends: 62558 [2021-11-25 19:42:14,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:42:14,447 INFO L933 BasicCegarLoop]: 12045 mSDtfsCounter, 10323 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 1190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10323 SdHoareTripleChecker+Valid, 12595 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1190 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:42:14,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10323 Valid, 12595 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1190 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-25 19:42:14,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62558 states. [2021-11-25 19:42:15,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62558 to 62556. [2021-11-25 19:42:15,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62556 states, 62555 states have (on average 1.584237870673807) internal successors, (99102), 62555 states have internal predecessors, (99102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:42:15,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62556 states to 62556 states and 99102 transitions. [2021-11-25 19:42:15,905 INFO L78 Accepts]: Start accepts. Automaton has 62556 states and 99102 transitions. Word has length 45 [2021-11-25 19:42:15,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:42:15,905 INFO L470 AbstractCegarLoop]: Abstraction has 62556 states and 99102 transitions. [2021-11-25 19:42:15,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:42:15,906 INFO L276 IsEmpty]: Start isEmpty. Operand 62556 states and 99102 transitions. [2021-11-25 19:42:15,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 19:42:15,907 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:42:15,907 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:42:15,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 19:42:15,908 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:42:15,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:42:15,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1850197707, now seen corresponding path program 1 times [2021-11-25 19:42:15,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:42:15,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208474165] [2021-11-25 19:42:15,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:42:15,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:42:15,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:42:16,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:42:16,038 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:42:16,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208474165] [2021-11-25 19:42:16,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208474165] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:42:16,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:42:16,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:42:16,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612840724] [2021-11-25 19:42:16,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:42:16,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:42:16,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:42:16,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:42:16,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:42:16,040 INFO L87 Difference]: Start difference. First operand 62556 states and 99102 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:42:21,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:42:21,547 INFO L93 Difference]: Finished difference Result 119611 states and 189345 transitions. [2021-11-25 19:42:21,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:42:21,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-25 19:42:21,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:42:21,623 INFO L225 Difference]: With dead ends: 119611 [2021-11-25 19:42:21,623 INFO L226 Difference]: Without dead ends: 62790 [2021-11-25 19:42:21,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:42:21,649 INFO L933 BasicCegarLoop]: 9460 mSDtfsCounter, 20538 mSDsluCounter, 9229 mSDsCounter, 0 mSdLazyCounter, 4112 mSolverCounterSat, 2449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20538 SdHoareTripleChecker+Valid, 18689 SdHoareTripleChecker+Invalid, 6561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2449 IncrementalHoareTripleChecker+Valid, 4112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:42:21,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20538 Valid, 18689 Invalid, 6561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2449 Valid, 4112 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-25 19:42:21,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62790 states. [2021-11-25 19:42:22,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62790 to 60394. [2021-11-25 19:42:22,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60394 states, 60393 states have (on average 1.56274733826768) internal successors, (94379), 60393 states have internal predecessors, (94379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:42:22,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60394 states to 60394 states and 94379 transitions. [2021-11-25 19:42:22,416 INFO L78 Accepts]: Start accepts. Automaton has 60394 states and 94379 transitions. Word has length 51 [2021-11-25 19:42:22,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:42:22,417 INFO L470 AbstractCegarLoop]: Abstraction has 60394 states and 94379 transitions. [2021-11-25 19:42:22,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:42:22,417 INFO L276 IsEmpty]: Start isEmpty. Operand 60394 states and 94379 transitions. [2021-11-25 19:42:22,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-25 19:42:22,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:42:22,418 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:42:22,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 19:42:22,419 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:42:22,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:42:22,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1545744311, now seen corresponding path program 1 times [2021-11-25 19:42:22,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:42:22,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139858327] [2021-11-25 19:42:22,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:42:22,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:42:22,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:42:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:42:22,500 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:42:22,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139858327] [2021-11-25 19:42:22,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139858327] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:42:22,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:42:22,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:42:22,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037771118] [2021-11-25 19:42:22,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:42:22,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:42:22,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:42:22,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:42:22,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:42:22,502 INFO L87 Difference]: Start difference. First operand 60394 states and 94379 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:42:24,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:42:24,083 INFO L93 Difference]: Finished difference Result 120431 states and 188192 transitions. [2021-11-25 19:42:24,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:42:24,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-25 19:42:24,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:42:24,159 INFO L225 Difference]: With dead ends: 120431 [2021-11-25 19:42:24,159 INFO L226 Difference]: Without dead ends: 60456 [2021-11-25 19:42:24,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:42:24,189 INFO L933 BasicCegarLoop]: 11635 mSDtfsCounter, 277 mSDsluCounter, 10273 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 21908 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:42:24,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 21908 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-25 19:42:24,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60456 states. [2021-11-25 19:42:25,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60456 to 60454. [2021-11-25 19:42:25,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60454 states, 60453 states have (on average 1.5621888078341852) internal successors, (94439), 60453 states have internal predecessors, (94439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:42:25,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60454 states to 60454 states and 94439 transitions. [2021-11-25 19:42:25,393 INFO L78 Accepts]: Start accepts. Automaton has 60454 states and 94439 transitions. Word has length 52 [2021-11-25 19:42:25,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:42:25,394 INFO L470 AbstractCegarLoop]: Abstraction has 60454 states and 94439 transitions. [2021-11-25 19:42:25,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:42:25,394 INFO L276 IsEmpty]: Start isEmpty. Operand 60454 states and 94439 transitions. [2021-11-25 19:42:25,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-25 19:42:25,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:42:25,395 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:42:25,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 19:42:25,395 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:42:25,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:42:25,396 INFO L85 PathProgramCache]: Analyzing trace with hash -645596173, now seen corresponding path program 1 times [2021-11-25 19:42:25,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:42:25,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940860974] [2021-11-25 19:42:25,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:42:25,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:42:25,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:42:25,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:42:25,488 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:42:25,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940860974] [2021-11-25 19:42:25,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940860974] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:42:25,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:42:25,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:42:25,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172361099] [2021-11-25 19:42:25,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:42:25,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:42:25,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:42:25,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:42:25,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:42:25,493 INFO L87 Difference]: Start difference. First operand 60454 states and 94439 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:42:28,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:42:28,674 INFO L93 Difference]: Finished difference Result 110046 states and 171349 transitions. [2021-11-25 19:42:28,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:42:28,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 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 57 [2021-11-25 19:42:28,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:42:28,750 INFO L225 Difference]: With dead ends: 110046 [2021-11-25 19:42:28,750 INFO L226 Difference]: Without dead ends: 61420 [2021-11-25 19:42:28,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:42:28,775 INFO L933 BasicCegarLoop]: 10157 mSDtfsCounter, 9944 mSDsluCounter, 9401 mSDsCounter, 0 mSdLazyCounter, 2796 mSolverCounterSat, 1080 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9944 SdHoareTripleChecker+Valid, 19558 SdHoareTripleChecker+Invalid, 3876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1080 IncrementalHoareTripleChecker+Valid, 2796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:42:28,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9944 Valid, 19558 Invalid, 3876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1080 Valid, 2796 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-25 19:42:28,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61420 states. [2021-11-25 19:42:29,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61420 to 60198. [2021-11-25 19:42:29,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60198 states, 60197 states have (on average 1.551821519344818) internal successors, (93415), 60197 states have internal predecessors, (93415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:42:29,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60198 states to 60198 states and 93415 transitions. [2021-11-25 19:42:29,835 INFO L78 Accepts]: Start accepts. Automaton has 60198 states and 93415 transitions. Word has length 57 [2021-11-25 19:42:29,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:42:29,835 INFO L470 AbstractCegarLoop]: Abstraction has 60198 states and 93415 transitions. [2021-11-25 19:42:29,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:42:29,836 INFO L276 IsEmpty]: Start isEmpty. Operand 60198 states and 93415 transitions. [2021-11-25 19:42:29,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-25 19:42:29,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:42:29,836 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:42:29,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 19:42:29,837 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:42:29,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:42:29,837 INFO L85 PathProgramCache]: Analyzing trace with hash 2088051592, now seen corresponding path program 1 times [2021-11-25 19:42:29,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:42:29,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538893023] [2021-11-25 19:42:29,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:42:29,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:42:29,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:42:29,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:42:29,968 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:42:29,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538893023] [2021-11-25 19:42:29,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538893023] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:42:29,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:42:29,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:42:29,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271610049] [2021-11-25 19:42:29,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:42:29,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:42:29,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:42:29,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:42:29,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:42:29,970 INFO L87 Difference]: Start difference. First operand 60198 states and 93415 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:42:34,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:42:34,180 INFO L93 Difference]: Finished difference Result 122229 states and 188540 transitions. [2021-11-25 19:42:34,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:42:34,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-11-25 19:42:34,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:42:34,266 INFO L225 Difference]: With dead ends: 122229 [2021-11-25 19:42:34,266 INFO L226 Difference]: Without dead ends: 62410 [2021-11-25 19:42:34,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:42:34,293 INFO L933 BasicCegarLoop]: 10083 mSDtfsCounter, 10224 mSDsluCounter, 9165 mSDsCounter, 0 mSdLazyCounter, 3871 mSolverCounterSat, 846 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10224 SdHoareTripleChecker+Valid, 19248 SdHoareTripleChecker+Invalid, 4717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 846 IncrementalHoareTripleChecker+Valid, 3871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:42:34,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10224 Valid, 19248 Invalid, 4717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [846 Valid, 3871 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-25 19:42:34,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62410 states. [2021-11-25 19:42:34,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62410 to 59892. [2021-11-25 19:42:35,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59892 states, 59891 states have (on average 1.548279374196457) internal successors, (92728), 59891 states have internal predecessors, (92728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:42:35,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59892 states to 59892 states and 92728 transitions. [2021-11-25 19:42:35,366 INFO L78 Accepts]: Start accepts. Automaton has 59892 states and 92728 transitions. Word has length 63 [2021-11-25 19:42:35,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:42:35,366 INFO L470 AbstractCegarLoop]: Abstraction has 59892 states and 92728 transitions. [2021-11-25 19:42:35,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:42:35,366 INFO L276 IsEmpty]: Start isEmpty. Operand 59892 states and 92728 transitions. [2021-11-25 19:42:35,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-25 19:42:35,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:42:35,368 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:42:35,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 19:42:35,368 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:42:35,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:42:35,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1015894375, now seen corresponding path program 1 times [2021-11-25 19:42:35,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:42:35,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813905564] [2021-11-25 19:42:35,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:42:35,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:42:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:42:35,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:42:35,473 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:42:35,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813905564] [2021-11-25 19:42:35,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813905564] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:42:35,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:42:35,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:42:35,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845432044] [2021-11-25 19:42:35,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:42:35,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:42:35,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:42:35,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:42:35,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:42:35,476 INFO L87 Difference]: Start difference. First operand 59892 states and 92728 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)