./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.03.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG --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 b22948af7969548f6325803b9ef465ae282132daf74eccf91e8f6f6583a87156 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 05:06:20,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 05:06:20,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 05:06:20,270 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 05:06:20,271 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 05:06:20,276 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 05:06:20,277 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 05:06:20,281 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 05:06:20,284 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 05:06:20,289 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 05:06:20,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 05:06:20,292 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 05:06:20,293 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 05:06:20,295 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 05:06:20,297 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 05:06:20,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 05:06:20,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 05:06:20,309 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 05:06:20,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 05:06:20,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 05:06:20,322 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 05:06:20,323 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 05:06:20,327 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 05:06:20,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 05:06:20,339 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 05:06:20,339 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 05:06:20,339 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 05:06:20,342 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 05:06:20,343 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 05:06:20,344 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 05:06:20,345 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 05:06:20,346 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 05:06:20,348 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 05:06:20,349 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 05:06:20,351 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 05:06:20,351 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 05:06:20,352 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 05:06:20,352 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 05:06:20,352 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 05:06:20,353 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 05:06:20,354 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 05:06:20,355 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-29 05:06:20,383 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 05:06:20,383 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 05:06:20,384 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 05:06:20,384 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 05:06:20,384 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 05:06:20,384 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 05:06:20,385 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-29 05:06:20,385 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 05:06:20,385 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 05:06:20,385 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-29 05:06:20,385 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-29 05:06:20,386 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 05:06:20,386 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-29 05:06:20,386 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-29 05:06:20,386 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-29 05:06:20,387 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 05:06:20,387 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 05:06:20,387 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 05:06:20,388 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 05:06:20,388 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 05:06:20,388 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 05:06:20,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 05:06:20,388 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 05:06:20,388 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 05:06:20,389 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 05:06:20,389 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 05:06:20,389 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 05:06:20,389 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 05:06:20,390 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 05:06:20,391 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 05:06:20,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:06:20,392 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 05:06:20,392 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 05:06:20,393 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 05:06:20,393 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-29 05:06:20,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 05:06:20,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 05:06:20,394 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 05:06:20,394 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 05:06:20,394 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_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b22948af7969548f6325803b9ef465ae282132daf74eccf91e8f6f6583a87156 [2021-10-29 05:06:20,698 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 05:06:20,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 05:06:20,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 05:06:20,748 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 05:06:20,749 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 05:06:20,750 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/systemc/transmitter.03.cil.c [2021-10-29 05:06:20,836 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/data/1b90523ee/b1a1b91b707e4ad299d8a2fe21723327/FLAG6acf4a41d [2021-10-29 05:06:21,497 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 05:06:21,497 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/sv-benchmarks/c/systemc/transmitter.03.cil.c [2021-10-29 05:06:21,508 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/data/1b90523ee/b1a1b91b707e4ad299d8a2fe21723327/FLAG6acf4a41d [2021-10-29 05:06:21,833 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/data/1b90523ee/b1a1b91b707e4ad299d8a2fe21723327 [2021-10-29 05:06:21,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 05:06:21,838 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 05:06:21,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 05:06:21,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 05:06:21,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 05:06:21,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:06:21" (1/1) ... [2021-10-29 05:06:21,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1149c0c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:06:21, skipping insertion in model container [2021-10-29 05:06:21,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:06:21" (1/1) ... [2021-10-29 05:06:21,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 05:06:21,924 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:06:22,088 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/sv-benchmarks/c/systemc/transmitter.03.cil.c[401,414] [2021-10-29 05:06:22,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:06:22,234 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 05:06:22,249 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/sv-benchmarks/c/systemc/transmitter.03.cil.c[401,414] [2021-10-29 05:06:22,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:06:22,315 INFO L208 MainTranslator]: Completed translation [2021-10-29 05:06:22,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:06:22 WrapperNode [2021-10-29 05:06:22,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 05:06:22,317 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 05:06:22,317 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 05:06:22,317 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 05:06:22,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:06:22" (1/1) ... [2021-10-29 05:06:22,340 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:06:22" (1/1) ... [2021-10-29 05:06:22,393 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 05:06:22,394 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 05:06:22,394 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 05:06:22,394 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 05:06:22,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:06:22" (1/1) ... [2021-10-29 05:06:22,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:06:22" (1/1) ... [2021-10-29 05:06:22,413 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:06:22" (1/1) ... [2021-10-29 05:06:22,414 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:06:22" (1/1) ... [2021-10-29 05:06:22,432 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:06:22" (1/1) ... [2021-10-29 05:06:22,453 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:06:22" (1/1) ... [2021-10-29 05:06:22,459 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:06:22" (1/1) ... [2021-10-29 05:06:22,468 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 05:06:22,481 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 05:06:22,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 05:06:22,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 05:06:22,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:06:22" (1/1) ... [2021-10-29 05:06:22,519 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:06:22,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:06:22,565 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 05:06:22,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 05:06:22,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 05:06:22,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-29 05:06:22,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 05:06:22,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 05:06:24,817 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 05:06:24,818 INFO L299 CfgBuilder]: Removed 119 assume(true) statements. [2021-10-29 05:06:24,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:06:24 BoogieIcfgContainer [2021-10-29 05:06:24,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 05:06:24,827 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 05:06:24,827 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 05:06:24,832 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 05:06:24,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 05:06:21" (1/3) ... [2021-10-29 05:06:24,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fe22b14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:06:24, skipping insertion in model container [2021-10-29 05:06:24,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:06:22" (2/3) ... [2021-10-29 05:06:24,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fe22b14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:06:24, skipping insertion in model container [2021-10-29 05:06:24,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:06:24" (3/3) ... [2021-10-29 05:06:24,837 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.03.cil.c [2021-10-29 05:06:24,844 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 05:06:24,844 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-29 05:06:24,919 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 05:06:24,930 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 [2021-10-29 05:06:24,931 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-29 05:06:24,956 INFO L276 IsEmpty]: Start isEmpty. Operand has 129 states, 127 states have (on average 1.5669291338582678) internal successors, (199), 128 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:24,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-29 05:06:24,964 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:06:24,964 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:06:24,965 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:06:24,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:06:24,971 INFO L85 PathProgramCache]: Analyzing trace with hash -353893713, now seen corresponding path program 1 times [2021-10-29 05:06:24,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:06:24,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601926791] [2021-10-29 05:06:24,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:24,981 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:06:25,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:25,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:06:25,198 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:06:25,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601926791] [2021-10-29 05:06:25,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601926791] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:06:25,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:06:25,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 05:06:25,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104041724] [2021-10-29 05:06:25,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:06:25,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:06:25,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:06:25,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:06:25,228 INFO L87 Difference]: Start difference. First operand has 129 states, 127 states have (on average 1.5669291338582678) internal successors, (199), 128 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 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) [2021-10-29 05:06:25,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:06:25,325 INFO L93 Difference]: Finished difference Result 343 states and 529 transitions. [2021-10-29 05:06:25,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:06:25,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 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 [2021-10-29 05:06:25,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:06:25,340 INFO L225 Difference]: With dead ends: 343 [2021-10-29 05:06:25,341 INFO L226 Difference]: Without dead ends: 216 [2021-10-29 05:06:25,344 INFO L786 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 [2021-10-29 05:06:25,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-10-29 05:06:25,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 213. [2021-10-29 05:06:25,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.4952830188679245) internal successors, (317), 212 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:25,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 317 transitions. [2021-10-29 05:06:25,405 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 317 transitions. Word has length 24 [2021-10-29 05:06:25,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:06:25,405 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 317 transitions. [2021-10-29 05:06:25,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 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) [2021-10-29 05:06:25,406 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 317 transitions. [2021-10-29 05:06:25,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-29 05:06:25,407 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:06:25,408 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:06:25,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-29 05:06:25,408 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:06:25,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:06:25,409 INFO L85 PathProgramCache]: Analyzing trace with hash 307440078, now seen corresponding path program 1 times [2021-10-29 05:06:25,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:06:25,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773865588] [2021-10-29 05:06:25,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:25,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:06:25,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:25,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:06:25,516 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:06:25,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773865588] [2021-10-29 05:06:25,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773865588] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:06:25,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:06:25,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 05:06:25,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951751514] [2021-10-29 05:06:25,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:06:25,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:06:25,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:06:25,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:06:25,520 INFO L87 Difference]: Start difference. First operand 213 states and 317 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 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) [2021-10-29 05:06:25,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:06:25,619 INFO L93 Difference]: Finished difference Result 598 states and 890 transitions. [2021-10-29 05:06:25,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:06:25,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 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 [2021-10-29 05:06:25,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:06:25,625 INFO L225 Difference]: With dead ends: 598 [2021-10-29 05:06:25,626 INFO L226 Difference]: Without dead ends: 398 [2021-10-29 05:06:25,628 INFO L786 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 [2021-10-29 05:06:25,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-10-29 05:06:25,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 396. [2021-10-29 05:06:25,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 1.460759493670886) internal successors, (577), 395 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:25,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 577 transitions. [2021-10-29 05:06:25,718 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 577 transitions. Word has length 24 [2021-10-29 05:06:25,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:06:25,719 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 577 transitions. [2021-10-29 05:06:25,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 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) [2021-10-29 05:06:25,720 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 577 transitions. [2021-10-29 05:06:25,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-29 05:06:25,731 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:06:25,732 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:06:25,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-29 05:06:25,733 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:06:25,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:06:25,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1943490319, now seen corresponding path program 1 times [2021-10-29 05:06:25,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:06:25,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141764270] [2021-10-29 05:06:25,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:25,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:06:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:25,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-29 05:06:25,859 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:06:25,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141764270] [2021-10-29 05:06:25,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141764270] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:06:25,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:06:25,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 05:06:25,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496913155] [2021-10-29 05:06:25,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:06:25,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:06:25,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:06:25,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:06:25,870 INFO L87 Difference]: Start difference. First operand 396 states and 577 transitions. Second operand has 4 states, 4 states have (on average 7.25) 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) [2021-10-29 05:06:26,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:06:26,037 INFO L93 Difference]: Finished difference Result 1352 states and 1970 transitions. [2021-10-29 05:06:26,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 05:06:26,038 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) 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 33 [2021-10-29 05:06:26,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:06:26,046 INFO L225 Difference]: With dead ends: 1352 [2021-10-29 05:06:26,046 INFO L226 Difference]: Without dead ends: 971 [2021-10-29 05:06:26,053 INFO L786 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 [2021-10-29 05:06:26,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-10-29 05:06:26,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 695. [2021-10-29 05:06:26,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 1.4610951008645534) internal successors, (1014), 694 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:26,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1014 transitions. [2021-10-29 05:06:26,120 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1014 transitions. Word has length 33 [2021-10-29 05:06:26,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:06:26,120 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 1014 transitions. [2021-10-29 05:06:26,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) 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) [2021-10-29 05:06:26,121 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1014 transitions. [2021-10-29 05:06:26,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-29 05:06:26,124 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:06:26,124 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:06:26,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-29 05:06:26,126 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:06:26,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:06:26,127 INFO L85 PathProgramCache]: Analyzing trace with hash 637142437, now seen corresponding path program 1 times [2021-10-29 05:06:26,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:06:26,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065991455] [2021-10-29 05:06:26,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:26,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:06:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:26,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-29 05:06:26,297 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:06:26,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065991455] [2021-10-29 05:06:26,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065991455] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:06:26,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:06:26,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 05:06:26,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516878362] [2021-10-29 05:06:26,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:06:26,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:06:26,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:06:26,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:06:26,307 INFO L87 Difference]: Start difference. First operand 695 states and 1014 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:26,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:06:26,488 INFO L93 Difference]: Finished difference Result 1943 states and 2847 transitions. [2021-10-29 05:06:26,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 05:06:26,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 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 [2021-10-29 05:06:26,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:06:26,499 INFO L225 Difference]: With dead ends: 1943 [2021-10-29 05:06:26,500 INFO L226 Difference]: Without dead ends: 1263 [2021-10-29 05:06:26,503 INFO L786 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 [2021-10-29 05:06:26,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2021-10-29 05:06:26,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 996. [2021-10-29 05:06:26,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 1.4623115577889447) internal successors, (1455), 995 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:26,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1455 transitions. [2021-10-29 05:06:26,581 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1455 transitions. Word has length 35 [2021-10-29 05:06:26,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:06:26,582 INFO L470 AbstractCegarLoop]: Abstraction has 996 states and 1455 transitions. [2021-10-29 05:06:26,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:26,582 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1455 transitions. [2021-10-29 05:06:26,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-29 05:06:26,588 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:06:26,588 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:06:26,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-29 05:06:26,589 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:06:26,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:06:26,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1671338993, now seen corresponding path program 1 times [2021-10-29 05:06:26,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:06:26,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783227599] [2021-10-29 05:06:26,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:26,592 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:06:26,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:26,720 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-29 05:06:26,721 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:06:26,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783227599] [2021-10-29 05:06:26,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783227599] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:06:26,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:06:26,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 05:06:26,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377442164] [2021-10-29 05:06:26,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:06:26,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:06:26,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:06:26,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:06:26,725 INFO L87 Difference]: Start difference. First operand 996 states and 1455 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:26,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:06:26,964 INFO L93 Difference]: Finished difference Result 3393 states and 4937 transitions. [2021-10-29 05:06:26,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 05:06:26,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 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 37 [2021-10-29 05:06:26,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:06:26,981 INFO L225 Difference]: With dead ends: 3393 [2021-10-29 05:06:26,982 INFO L226 Difference]: Without dead ends: 2412 [2021-10-29 05:06:26,984 INFO L786 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 [2021-10-29 05:06:26,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-10-29 05:06:27,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 1745. [2021-10-29 05:06:27,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1745 states, 1744 states have (on average 1.4541284403669725) internal successors, (2536), 1744 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:27,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 2536 transitions. [2021-10-29 05:06:27,116 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 2536 transitions. Word has length 37 [2021-10-29 05:06:27,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:06:27,117 INFO L470 AbstractCegarLoop]: Abstraction has 1745 states and 2536 transitions. [2021-10-29 05:06:27,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:27,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 2536 transitions. [2021-10-29 05:06:27,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-29 05:06:27,120 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:06:27,121 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:06:27,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-29 05:06:27,121 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:06:27,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:06:27,122 INFO L85 PathProgramCache]: Analyzing trace with hash 296640951, now seen corresponding path program 1 times [2021-10-29 05:06:27,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:06:27,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516194154] [2021-10-29 05:06:27,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:27,123 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:06:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:27,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:06:27,232 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:06:27,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516194154] [2021-10-29 05:06:27,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516194154] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:06:27,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:06:27,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 05:06:27,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682492899] [2021-10-29 05:06:27,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:06:27,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:06:27,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:06:27,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:06:27,238 INFO L87 Difference]: Start difference. First operand 1745 states and 2536 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:27,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:06:27,425 INFO L93 Difference]: Finished difference Result 3243 states and 4777 transitions. [2021-10-29 05:06:27,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:06:27,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-10-29 05:06:27,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:06:27,441 INFO L225 Difference]: With dead ends: 3243 [2021-10-29 05:06:27,441 INFO L226 Difference]: Without dead ends: 2351 [2021-10-29 05:06:27,443 INFO L786 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 [2021-10-29 05:06:27,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-10-29 05:06:27,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1893. [2021-10-29 05:06:27,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 1.4630021141649048) internal successors, (2768), 1892 states have internal predecessors, (2768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:27,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 2768 transitions. [2021-10-29 05:06:27,561 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 2768 transitions. Word has length 39 [2021-10-29 05:06:27,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:06:27,562 INFO L470 AbstractCegarLoop]: Abstraction has 1893 states and 2768 transitions. [2021-10-29 05:06:27,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:27,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 2768 transitions. [2021-10-29 05:06:27,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-29 05:06:27,567 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:06:27,567 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:06:27,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-29 05:06:27,567 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:06:27,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:06:27,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1362809959, now seen corresponding path program 1 times [2021-10-29 05:06:27,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:06:27,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135981260] [2021-10-29 05:06:27,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:27,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:06:27,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-29 05:06:27,619 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:06:27,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135981260] [2021-10-29 05:06:27,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135981260] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:06:27,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:06:27,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 05:06:27,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462574972] [2021-10-29 05:06:27,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:06:27,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:06:27,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:06:27,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:06:27,621 INFO L87 Difference]: Start difference. First operand 1893 states and 2768 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:27,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:06:27,823 INFO L93 Difference]: Finished difference Result 4609 states and 6718 transitions. [2021-10-29 05:06:27,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:06:27,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 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 54 [2021-10-29 05:06:27,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:06:27,841 INFO L225 Difference]: With dead ends: 4609 [2021-10-29 05:06:27,841 INFO L226 Difference]: Without dead ends: 2725 [2021-10-29 05:06:27,844 INFO L786 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 [2021-10-29 05:06:27,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-10-29 05:06:28,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 2705. [2021-10-29 05:06:28,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2705 states, 2704 states have (on average 1.4386094674556213) internal successors, (3890), 2704 states have internal predecessors, (3890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:28,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2705 states to 2705 states and 3890 transitions. [2021-10-29 05:06:28,024 INFO L78 Accepts]: Start accepts. Automaton has 2705 states and 3890 transitions. Word has length 54 [2021-10-29 05:06:28,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:06:28,025 INFO L470 AbstractCegarLoop]: Abstraction has 2705 states and 3890 transitions. [2021-10-29 05:06:28,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:28,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2705 states and 3890 transitions. [2021-10-29 05:06:28,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-29 05:06:28,032 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:06:28,032 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:06:28,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-29 05:06:28,049 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:06:28,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:06:28,050 INFO L85 PathProgramCache]: Analyzing trace with hash -855675489, now seen corresponding path program 1 times [2021-10-29 05:06:28,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:06:28,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193385390] [2021-10-29 05:06:28,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:28,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:06:28,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:28,151 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-29 05:06:28,151 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:06:28,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193385390] [2021-10-29 05:06:28,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193385390] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:06:28,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:06:28,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 05:06:28,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991032934] [2021-10-29 05:06:28,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:06:28,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:06:28,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:06:28,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:06:28,156 INFO L87 Difference]: Start difference. First operand 2705 states and 3890 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) [2021-10-29 05:06:28,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:06:28,470 INFO L93 Difference]: Finished difference Result 7690 states and 11025 transitions. [2021-10-29 05:06:28,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:06:28,471 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 54 [2021-10-29 05:06:28,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:06:28,503 INFO L225 Difference]: With dead ends: 7690 [2021-10-29 05:06:28,503 INFO L226 Difference]: Without dead ends: 4987 [2021-10-29 05:06:28,509 INFO L786 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 [2021-10-29 05:06:28,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4987 states. [2021-10-29 05:06:28,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4987 to 4949. [2021-10-29 05:06:28,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4949 states, 4948 states have (on average 1.404607922392886) internal successors, (6950), 4948 states have internal predecessors, (6950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:28,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4949 states to 4949 states and 6950 transitions. [2021-10-29 05:06:28,861 INFO L78 Accepts]: Start accepts. Automaton has 4949 states and 6950 transitions. Word has length 54 [2021-10-29 05:06:28,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:06:28,861 INFO L470 AbstractCegarLoop]: Abstraction has 4949 states and 6950 transitions. [2021-10-29 05:06:28,861 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) [2021-10-29 05:06:28,862 INFO L276 IsEmpty]: Start isEmpty. Operand 4949 states and 6950 transitions. [2021-10-29 05:06:28,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-29 05:06:28,868 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:06:28,868 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:06:28,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-29 05:06:28,869 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:06:28,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:06:28,869 INFO L85 PathProgramCache]: Analyzing trace with hash -969062146, now seen corresponding path program 1 times [2021-10-29 05:06:28,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:06:28,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899331949] [2021-10-29 05:06:28,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:28,870 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:06:28,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:28,974 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-29 05:06:28,974 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:06:28,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899331949] [2021-10-29 05:06:28,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899331949] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:06:28,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:06:28,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 05:06:28,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297324410] [2021-10-29 05:06:28,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:06:28,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:06:28,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:06:28,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:06:28,982 INFO L87 Difference]: Start difference. First operand 4949 states and 6950 transitions. Second operand has 4 states, 4 states have (on average 12.75) 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) [2021-10-29 05:06:29,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:06:29,455 INFO L93 Difference]: Finished difference Result 10721 states and 15232 transitions. [2021-10-29 05:06:29,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 05:06:29,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) 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 54 [2021-10-29 05:06:29,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:06:29,499 INFO L225 Difference]: With dead ends: 10721 [2021-10-29 05:06:29,499 INFO L226 Difference]: Without dead ends: 6437 [2021-10-29 05:06:29,506 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:06:29,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6437 states. [2021-10-29 05:06:29,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6437 to 6285. [2021-10-29 05:06:29,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6285 states, 6284 states have (on average 1.4174092934436664) internal successors, (8907), 6284 states have internal predecessors, (8907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:29,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6285 states to 6285 states and 8907 transitions. [2021-10-29 05:06:29,983 INFO L78 Accepts]: Start accepts. Automaton has 6285 states and 8907 transitions. Word has length 54 [2021-10-29 05:06:29,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:06:29,985 INFO L470 AbstractCegarLoop]: Abstraction has 6285 states and 8907 transitions. [2021-10-29 05:06:29,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) 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) [2021-10-29 05:06:29,985 INFO L276 IsEmpty]: Start isEmpty. Operand 6285 states and 8907 transitions. [2021-10-29 05:06:29,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-29 05:06:29,993 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:06:29,993 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:06:29,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-29 05:06:29,994 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:06:29,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:06:29,994 INFO L85 PathProgramCache]: Analyzing trace with hash 2046580415, now seen corresponding path program 1 times [2021-10-29 05:06:29,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:06:29,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109540841] [2021-10-29 05:06:29,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:29,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:06:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:06:30,064 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:06:30,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109540841] [2021-10-29 05:06:30,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109540841] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:06:30,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:06:30,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 05:06:30,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195912011] [2021-10-29 05:06:30,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:06:30,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:06:30,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:06:30,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:06:30,067 INFO L87 Difference]: Start difference. First operand 6285 states and 8907 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:30,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:06:30,457 INFO L93 Difference]: Finished difference Result 9687 states and 13825 transitions. [2021-10-29 05:06:30,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:06:30,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-10-29 05:06:30,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:06:30,496 INFO L225 Difference]: With dead ends: 9687 [2021-10-29 05:06:30,496 INFO L226 Difference]: Without dead ends: 6285 [2021-10-29 05:06:30,504 INFO L786 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 [2021-10-29 05:06:30,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6285 states. [2021-10-29 05:06:30,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6285 to 6179. [2021-10-29 05:06:30,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6179 states, 6178 states have (on average 1.3886370993849142) internal successors, (8579), 6178 states have internal predecessors, (8579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:30,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6179 states to 6179 states and 8579 transitions. [2021-10-29 05:06:30,984 INFO L78 Accepts]: Start accepts. Automaton has 6179 states and 8579 transitions. Word has length 54 [2021-10-29 05:06:30,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:06:30,986 INFO L470 AbstractCegarLoop]: Abstraction has 6179 states and 8579 transitions. [2021-10-29 05:06:30,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:30,986 INFO L276 IsEmpty]: Start isEmpty. Operand 6179 states and 8579 transitions. [2021-10-29 05:06:30,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-29 05:06:30,995 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:06:30,995 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:06:30,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-29 05:06:30,996 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:06:30,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:06:30,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1406015679, now seen corresponding path program 1 times [2021-10-29 05:06:30,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:06:30,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881944710] [2021-10-29 05:06:30,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:30,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:06:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:31,082 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:06:31,083 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:06:31,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881944710] [2021-10-29 05:06:31,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881944710] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:06:31,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:06:31,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-29 05:06:31,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995919882] [2021-10-29 05:06:31,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:06:31,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:06:31,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:06:31,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:06:31,085 INFO L87 Difference]: Start difference. First operand 6179 states and 8579 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:31,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:06:31,671 INFO L93 Difference]: Finished difference Result 11913 states and 16277 transitions. [2021-10-29 05:06:31,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 05:06:31,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-10-29 05:06:31,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:06:31,700 INFO L225 Difference]: With dead ends: 11913 [2021-10-29 05:06:31,700 INFO L226 Difference]: Without dead ends: 9310 [2021-10-29 05:06:31,707 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:06:31,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9310 states. [2021-10-29 05:06:32,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9310 to 7707. [2021-10-29 05:06:32,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7707 states, 7706 states have (on average 1.3542694004671685) internal successors, (10436), 7706 states have internal predecessors, (10436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:32,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7707 states to 7707 states and 10436 transitions. [2021-10-29 05:06:32,271 INFO L78 Accepts]: Start accepts. Automaton has 7707 states and 10436 transitions. Word has length 55 [2021-10-29 05:06:32,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:06:32,271 INFO L470 AbstractCegarLoop]: Abstraction has 7707 states and 10436 transitions. [2021-10-29 05:06:32,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:32,273 INFO L276 IsEmpty]: Start isEmpty. Operand 7707 states and 10436 transitions. [2021-10-29 05:06:32,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-29 05:06:32,280 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:06:32,280 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:06:32,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-29 05:06:32,281 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:06:32,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:06:32,281 INFO L85 PathProgramCache]: Analyzing trace with hash 560491726, now seen corresponding path program 1 times [2021-10-29 05:06:32,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:06:32,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442183407] [2021-10-29 05:06:32,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:32,282 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:06:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:06:32,321 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:06:32,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442183407] [2021-10-29 05:06:32,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442183407] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:06:32,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:06:32,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 05:06:32,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571368848] [2021-10-29 05:06:32,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:06:32,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:06:32,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:06:32,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:06:32,326 INFO L87 Difference]: Start difference. First operand 7707 states and 10436 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) [2021-10-29 05:06:32,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:06:32,773 INFO L93 Difference]: Finished difference Result 14309 states and 19640 transitions. [2021-10-29 05:06:32,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:06:32,775 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 56 [2021-10-29 05:06:32,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:06:32,807 INFO L225 Difference]: With dead ends: 14309 [2021-10-29 05:06:32,807 INFO L226 Difference]: Without dead ends: 8935 [2021-10-29 05:06:32,817 INFO L786 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 [2021-10-29 05:06:32,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8935 states. [2021-10-29 05:06:33,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8935 to 8162. [2021-10-29 05:06:33,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8162 states, 8161 states have (on average 1.3635583874525181) internal successors, (11128), 8161 states have internal predecessors, (11128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:33,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8162 states to 8162 states and 11128 transitions. [2021-10-29 05:06:33,186 INFO L78 Accepts]: Start accepts. Automaton has 8162 states and 11128 transitions. Word has length 56 [2021-10-29 05:06:33,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:06:33,187 INFO L470 AbstractCegarLoop]: Abstraction has 8162 states and 11128 transitions. [2021-10-29 05:06:33,187 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) [2021-10-29 05:06:33,187 INFO L276 IsEmpty]: Start isEmpty. Operand 8162 states and 11128 transitions. [2021-10-29 05:06:33,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-29 05:06:33,194 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:06:33,194 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:06:33,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-29 05:06:33,195 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:06:33,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:06:33,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1770572136, now seen corresponding path program 1 times [2021-10-29 05:06:33,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:06:33,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827055877] [2021-10-29 05:06:33,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:33,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:06:33,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:33,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-29 05:06:33,247 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:06:33,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827055877] [2021-10-29 05:06:33,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827055877] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 05:06:33,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884054042] [2021-10-29 05:06:33,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:33,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:06:33,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:06:33,265 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:06:33,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-29 05:06:33,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:33,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-29 05:06:33,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:06:33,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:06:33,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:06:33,953 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:06:33,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884054042] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:06:33,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-29 05:06:33,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [4] total 7 [2021-10-29 05:06:33,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589931528] [2021-10-29 05:06:33,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-29 05:06:33,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:06:33,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-29 05:06:33,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-29 05:06:33,956 INFO L87 Difference]: Start difference. First operand 8162 states and 11128 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:34,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:06:34,819 INFO L93 Difference]: Finished difference Result 19949 states and 27238 transitions. [2021-10-29 05:06:34,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-29 05:06:34,820 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-10-29 05:06:34,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:06:34,858 INFO L225 Difference]: With dead ends: 19949 [2021-10-29 05:06:34,858 INFO L226 Difference]: Without dead ends: 11967 [2021-10-29 05:06:34,871 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-10-29 05:06:34,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11967 states. [2021-10-29 05:06:35,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11967 to 6801. [2021-10-29 05:06:35,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6801 states, 6800 states have (on average 1.3745588235294117) internal successors, (9347), 6800 states have internal predecessors, (9347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:35,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6801 states to 6801 states and 9347 transitions. [2021-10-29 05:06:35,466 INFO L78 Accepts]: Start accepts. Automaton has 6801 states and 9347 transitions. Word has length 58 [2021-10-29 05:06:35,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:06:35,467 INFO L470 AbstractCegarLoop]: Abstraction has 6801 states and 9347 transitions. [2021-10-29 05:06:35,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:35,467 INFO L276 IsEmpty]: Start isEmpty. Operand 6801 states and 9347 transitions. [2021-10-29 05:06:35,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-10-29 05:06:35,496 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:06:35,497 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:06:35,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-29 05:06:35,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-29 05:06:35,722 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:06:35,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:06:35,722 INFO L85 PathProgramCache]: Analyzing trace with hash -2020330492, now seen corresponding path program 1 times [2021-10-29 05:06:35,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:06:35,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974095280] [2021-10-29 05:06:35,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:35,723 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:06:35,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:35,789 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:06:35,790 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:06:35,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974095280] [2021-10-29 05:06:35,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974095280] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:06:35,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:06:35,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 05:06:35,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006287807] [2021-10-29 05:06:35,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:06:35,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:06:35,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:06:35,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:06:35,794 INFO L87 Difference]: Start difference. First operand 6801 states and 9347 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:36,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:06:36,267 INFO L93 Difference]: Finished difference Result 11744 states and 16246 transitions. [2021-10-29 05:06:36,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:06:36,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-10-29 05:06:36,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:06:36,287 INFO L225 Difference]: With dead ends: 11744 [2021-10-29 05:06:36,287 INFO L226 Difference]: Without dead ends: 6845 [2021-10-29 05:06:36,295 INFO L786 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 [2021-10-29 05:06:36,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6845 states. [2021-10-29 05:06:36,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6845 to 6777. [2021-10-29 05:06:36,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6777 states, 6776 states have (on average 1.3342680047225501) internal successors, (9041), 6776 states have internal predecessors, (9041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:36,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6777 states to 6777 states and 9041 transitions. [2021-10-29 05:06:36,679 INFO L78 Accepts]: Start accepts. Automaton has 6777 states and 9041 transitions. Word has length 72 [2021-10-29 05:06:36,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:06:36,680 INFO L470 AbstractCegarLoop]: Abstraction has 6777 states and 9041 transitions. [2021-10-29 05:06:36,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:36,680 INFO L276 IsEmpty]: Start isEmpty. Operand 6777 states and 9041 transitions. [2021-10-29 05:06:36,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-10-29 05:06:36,693 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:06:36,693 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:06:36,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-29 05:06:36,694 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:06:36,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:06:36,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1351056718, now seen corresponding path program 1 times [2021-10-29 05:06:36,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:06:36,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747516997] [2021-10-29 05:06:36,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:36,695 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:06:36,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:36,744 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-29 05:06:36,744 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:06:36,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747516997] [2021-10-29 05:06:36,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747516997] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:06:36,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:06:36,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-29 05:06:36,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446014647] [2021-10-29 05:06:36,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:06:36,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:06:36,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:06:36,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:06:36,747 INFO L87 Difference]: Start difference. First operand 6777 states and 9041 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:37,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:06:37,421 INFO L93 Difference]: Finished difference Result 16626 states and 22017 transitions. [2021-10-29 05:06:37,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-29 05:06:37,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 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 72 [2021-10-29 05:06:37,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:06:37,451 INFO L225 Difference]: With dead ends: 16626 [2021-10-29 05:06:37,452 INFO L226 Difference]: Without dead ends: 11423 [2021-10-29 05:06:37,466 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:06:37,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11423 states. [2021-10-29 05:06:37,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11423 to 9118. [2021-10-29 05:06:37,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9118 states, 9117 states have (on average 1.3133706263025118) internal successors, (11974), 9117 states have internal predecessors, (11974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:37,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9118 states to 9118 states and 11974 transitions. [2021-10-29 05:06:37,958 INFO L78 Accepts]: Start accepts. Automaton has 9118 states and 11974 transitions. Word has length 72 [2021-10-29 05:06:37,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:06:37,959 INFO L470 AbstractCegarLoop]: Abstraction has 9118 states and 11974 transitions. [2021-10-29 05:06:37,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:37,959 INFO L276 IsEmpty]: Start isEmpty. Operand 9118 states and 11974 transitions. [2021-10-29 05:06:37,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-10-29 05:06:37,977 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:06:37,977 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:06:37,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-29 05:06:37,978 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:06:37,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:06:37,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1659495727, now seen corresponding path program 1 times [2021-10-29 05:06:37,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:06:37,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144033966] [2021-10-29 05:06:37,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:37,979 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:06:37,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:38,023 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:06:38,023 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:06:38,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144033966] [2021-10-29 05:06:38,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144033966] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:06:38,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:06:38,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 05:06:38,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400487160] [2021-10-29 05:06:38,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:06:38,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:06:38,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:06:38,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:06:38,026 INFO L87 Difference]: Start difference. First operand 9118 states and 11974 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:38,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:06:38,362 INFO L93 Difference]: Finished difference Result 14023 states and 18587 transitions. [2021-10-29 05:06:38,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:06:38,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-10-29 05:06:38,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:06:38,375 INFO L225 Difference]: With dead ends: 14023 [2021-10-29 05:06:38,375 INFO L226 Difference]: Without dead ends: 5572 [2021-10-29 05:06:38,388 INFO L786 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 [2021-10-29 05:06:38,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5572 states. [2021-10-29 05:06:38,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5572 to 4816. [2021-10-29 05:06:38,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4816 states, 4815 states have (on average 1.2868120456905503) internal successors, (6196), 4815 states have internal predecessors, (6196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:38,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4816 states to 4816 states and 6196 transitions. [2021-10-29 05:06:38,701 INFO L78 Accepts]: Start accepts. Automaton has 4816 states and 6196 transitions. Word has length 72 [2021-10-29 05:06:38,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:06:38,701 INFO L470 AbstractCegarLoop]: Abstraction has 4816 states and 6196 transitions. [2021-10-29 05:06:38,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:38,702 INFO L276 IsEmpty]: Start isEmpty. Operand 4816 states and 6196 transitions. [2021-10-29 05:06:38,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-10-29 05:06:38,711 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:06:38,711 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:06:38,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-29 05:06:38,711 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:06:38,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:06:38,712 INFO L85 PathProgramCache]: Analyzing trace with hash 748008405, now seen corresponding path program 1 times [2021-10-29 05:06:38,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:06:38,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873766305] [2021-10-29 05:06:38,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:38,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:06:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-29 05:06:38,777 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:06:38,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873766305] [2021-10-29 05:06:38,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873766305] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:06:38,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:06:38,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 05:06:38,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137080863] [2021-10-29 05:06:38,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:06:38,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:06:38,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:06:38,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:06:38,781 INFO L87 Difference]: Start difference. First operand 4816 states and 6196 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:39,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:06:39,153 INFO L93 Difference]: Finished difference Result 8480 states and 10896 transitions. [2021-10-29 05:06:39,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:06:39,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 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 73 [2021-10-29 05:06:39,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:06:39,164 INFO L225 Difference]: With dead ends: 8480 [2021-10-29 05:06:39,165 INFO L226 Difference]: Without dead ends: 5096 [2021-10-29 05:06:39,171 INFO L786 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 [2021-10-29 05:06:39,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5096 states. [2021-10-29 05:06:39,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5096 to 4672. [2021-10-29 05:06:39,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4672 states, 4671 states have (on average 1.2680368229501178) internal successors, (5923), 4671 states have internal predecessors, (5923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:39,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4672 states to 4672 states and 5923 transitions. [2021-10-29 05:06:39,470 INFO L78 Accepts]: Start accepts. Automaton has 4672 states and 5923 transitions. Word has length 73 [2021-10-29 05:06:39,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:06:39,470 INFO L470 AbstractCegarLoop]: Abstraction has 4672 states and 5923 transitions. [2021-10-29 05:06:39,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:39,471 INFO L276 IsEmpty]: Start isEmpty. Operand 4672 states and 5923 transitions. [2021-10-29 05:06:39,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-10-29 05:06:39,479 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:06:39,480 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:06:39,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-29 05:06:39,480 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:06:39,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:06:39,481 INFO L85 PathProgramCache]: Analyzing trace with hash 343149287, now seen corresponding path program 1 times [2021-10-29 05:06:39,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:06:39,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885578617] [2021-10-29 05:06:39,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:39,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:06:39,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:39,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-29 05:06:39,584 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:06:39,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885578617] [2021-10-29 05:06:39,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885578617] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 05:06:39,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528703844] [2021-10-29 05:06:39,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:39,585 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:06:39,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:06:39,590 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:06:39,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-29 05:06:39,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:39,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-29 05:06:39,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:06:40,102 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:06:40,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:06:40,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:06:40,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528703844] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:06:40,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-29 05:06:40,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 4] imperfect sequences [4] total 10 [2021-10-29 05:06:40,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273389382] [2021-10-29 05:06:40,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-29 05:06:40,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:06:40,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-29 05:06:40,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-29 05:06:40,416 INFO L87 Difference]: Start difference. First operand 4672 states and 5923 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:41,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:06:41,141 INFO L93 Difference]: Finished difference Result 10023 states and 13004 transitions. [2021-10-29 05:06:41,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-29 05:06:41,142 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 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 73 [2021-10-29 05:06:41,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:06:41,154 INFO L225 Difference]: With dead ends: 10023 [2021-10-29 05:06:41,154 INFO L226 Difference]: Without dead ends: 6212 [2021-10-29 05:06:41,161 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-10-29 05:06:41,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6212 states. [2021-10-29 05:06:41,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6212 to 3359. [2021-10-29 05:06:41,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3359 states, 3358 states have (on average 1.2989874925550924) internal successors, (4362), 3358 states have internal predecessors, (4362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:41,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3359 states to 3359 states and 4362 transitions. [2021-10-29 05:06:41,538 INFO L78 Accepts]: Start accepts. Automaton has 3359 states and 4362 transitions. Word has length 73 [2021-10-29 05:06:41,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:06:41,539 INFO L470 AbstractCegarLoop]: Abstraction has 3359 states and 4362 transitions. [2021-10-29 05:06:41,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:41,539 INFO L276 IsEmpty]: Start isEmpty. Operand 3359 states and 4362 transitions. [2021-10-29 05:06:41,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-10-29 05:06:41,546 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:06:41,547 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:06:41,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-29 05:06:41,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-29 05:06:41,774 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:06:41,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:06:41,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1426202342, now seen corresponding path program 1 times [2021-10-29 05:06:41,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:06:41,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665820767] [2021-10-29 05:06:41,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:41,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:06:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:41,857 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:06:41,857 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:06:41,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665820767] [2021-10-29 05:06:41,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665820767] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:06:41,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:06:41,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-29 05:06:41,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228711677] [2021-10-29 05:06:41,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:06:41,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:06:41,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:06:41,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:06:41,862 INFO L87 Difference]: Start difference. First operand 3359 states and 4362 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:42,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:06:42,297 INFO L93 Difference]: Finished difference Result 6620 states and 8637 transitions. [2021-10-29 05:06:42,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 05:06:42,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-10-29 05:06:42,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:06:42,306 INFO L225 Difference]: With dead ends: 6620 [2021-10-29 05:06:42,306 INFO L226 Difference]: Without dead ends: 4179 [2021-10-29 05:06:42,311 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:06:42,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4179 states. [2021-10-29 05:06:42,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4179 to 3663. [2021-10-29 05:06:42,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3663 states, 3662 states have (on average 1.288367012561442) internal successors, (4718), 3662 states have internal predecessors, (4718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:42,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 4718 transitions. [2021-10-29 05:06:42,607 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 4718 transitions. Word has length 74 [2021-10-29 05:06:42,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:06:42,608 INFO L470 AbstractCegarLoop]: Abstraction has 3663 states and 4718 transitions. [2021-10-29 05:06:42,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:42,608 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 4718 transitions. [2021-10-29 05:06:42,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-10-29 05:06:42,614 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:06:42,615 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:06:42,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-29 05:06:42,615 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:06:42,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:06:42,616 INFO L85 PathProgramCache]: Analyzing trace with hash -120801950, now seen corresponding path program 1 times [2021-10-29 05:06:42,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:06:42,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845482194] [2021-10-29 05:06:42,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:42,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:06:42,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:42,684 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-29 05:06:42,685 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:06:42,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845482194] [2021-10-29 05:06:42,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845482194] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:06:42,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:06:42,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-29 05:06:42,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137577538] [2021-10-29 05:06:42,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-29 05:06:42,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:06:42,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-29 05:06:42,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:06:42,688 INFO L87 Difference]: Start difference. First operand 3663 states and 4718 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 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) [2021-10-29 05:06:43,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:06:43,471 INFO L93 Difference]: Finished difference Result 11633 states and 14836 transitions. [2021-10-29 05:06:43,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-29 05:06:43,472 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 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) Word has length 74 [2021-10-29 05:06:43,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:06:43,483 INFO L225 Difference]: With dead ends: 11633 [2021-10-29 05:06:43,483 INFO L226 Difference]: Without dead ends: 8293 [2021-10-29 05:06:43,490 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:06:43,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8293 states. [2021-10-29 05:06:43,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8293 to 4645. [2021-10-29 05:06:43,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4645 states, 4644 states have (on average 1.2790697674418605) internal successors, (5940), 4644 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:43,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4645 states to 4645 states and 5940 transitions. [2021-10-29 05:06:43,911 INFO L78 Accepts]: Start accepts. Automaton has 4645 states and 5940 transitions. Word has length 74 [2021-10-29 05:06:43,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:06:43,911 INFO L470 AbstractCegarLoop]: Abstraction has 4645 states and 5940 transitions. [2021-10-29 05:06:43,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 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) [2021-10-29 05:06:43,912 INFO L276 IsEmpty]: Start isEmpty. Operand 4645 states and 5940 transitions. [2021-10-29 05:06:43,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-10-29 05:06:43,920 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:06:43,920 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:06:43,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-29 05:06:43,920 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:06:43,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:06:43,921 INFO L85 PathProgramCache]: Analyzing trace with hash 2116561315, now seen corresponding path program 1 times [2021-10-29 05:06:43,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:06:43,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473209085] [2021-10-29 05:06:43,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:43,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:06:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:43,962 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:06:43,962 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:06:43,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473209085] [2021-10-29 05:06:43,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473209085] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:06:43,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:06:43,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 05:06:43,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52006196] [2021-10-29 05:06:43,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:06:43,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:06:43,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:06:43,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:06:43,965 INFO L87 Difference]: Start difference. First operand 4645 states and 5940 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:44,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:06:44,274 INFO L93 Difference]: Finished difference Result 9104 states and 11658 transitions. [2021-10-29 05:06:44,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:06:44,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-10-29 05:06:44,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:06:44,279 INFO L225 Difference]: With dead ends: 9104 [2021-10-29 05:06:44,279 INFO L226 Difference]: Without dead ends: 4641 [2021-10-29 05:06:44,284 INFO L786 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 [2021-10-29 05:06:44,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4641 states. [2021-10-29 05:06:44,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4641 to 4613. [2021-10-29 05:06:44,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4613 states, 4612 states have (on average 1.2202948829141371) internal successors, (5628), 4612 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:44,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 5628 transitions. [2021-10-29 05:06:44,542 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 5628 transitions. Word has length 74 [2021-10-29 05:06:44,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:06:44,542 INFO L470 AbstractCegarLoop]: Abstraction has 4613 states and 5628 transitions. [2021-10-29 05:06:44,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:44,542 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 5628 transitions. [2021-10-29 05:06:44,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-29 05:06:44,547 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:06:44,547 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:06:44,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-29 05:06:44,548 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:06:44,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:06:44,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1957529861, now seen corresponding path program 1 times [2021-10-29 05:06:44,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:06:44,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800441879] [2021-10-29 05:06:44,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:44,548 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:06:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:44,581 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:06:44,581 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:06:44,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800441879] [2021-10-29 05:06:44,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800441879] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:06:44,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:06:44,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 05:06:44,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101708382] [2021-10-29 05:06:44,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:06:44,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:06:44,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:06:44,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:06:44,584 INFO L87 Difference]: Start difference. First operand 4613 states and 5628 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:44,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:06:44,901 INFO L93 Difference]: Finished difference Result 9028 states and 11144 transitions. [2021-10-29 05:06:44,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:06:44,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-10-29 05:06:44,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:06:44,909 INFO L225 Difference]: With dead ends: 9028 [2021-10-29 05:06:44,909 INFO L226 Difference]: Without dead ends: 4601 [2021-10-29 05:06:44,913 INFO L786 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 [2021-10-29 05:06:44,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2021-10-29 05:06:45,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 4273. [2021-10-29 05:06:45,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4273 states, 4272 states have (on average 1.2425093632958801) internal successors, (5308), 4272 states have internal predecessors, (5308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:45,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4273 states to 4273 states and 5308 transitions. [2021-10-29 05:06:45,140 INFO L78 Accepts]: Start accepts. Automaton has 4273 states and 5308 transitions. Word has length 75 [2021-10-29 05:06:45,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:06:45,140 INFO L470 AbstractCegarLoop]: Abstraction has 4273 states and 5308 transitions. [2021-10-29 05:06:45,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:45,141 INFO L276 IsEmpty]: Start isEmpty. Operand 4273 states and 5308 transitions. [2021-10-29 05:06:45,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-29 05:06:45,147 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:06:45,147 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:06:45,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-29 05:06:45,148 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:06:45,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:06:45,148 INFO L85 PathProgramCache]: Analyzing trace with hash 2109087771, now seen corresponding path program 1 times [2021-10-29 05:06:45,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:06:45,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213873823] [2021-10-29 05:06:45,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:45,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:06:45,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:45,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:06:45,196 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:06:45,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213873823] [2021-10-29 05:06:45,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213873823] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:06:45,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:06:45,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 05:06:45,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224737458] [2021-10-29 05:06:45,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:06:45,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:06:45,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:06:45,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:06:45,198 INFO L87 Difference]: Start difference. First operand 4273 states and 5308 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:45,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:06:45,460 INFO L93 Difference]: Finished difference Result 7236 states and 9062 transitions. [2021-10-29 05:06:45,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:06:45,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-10-29 05:06:45,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:06:45,465 INFO L225 Difference]: With dead ends: 7236 [2021-10-29 05:06:45,465 INFO L226 Difference]: Without dead ends: 3291 [2021-10-29 05:06:45,468 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:06:45,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3291 states. [2021-10-29 05:06:45,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3291 to 3291. [2021-10-29 05:06:45,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3291 states, 3290 states have (on average 1.2264437689969605) internal successors, (4035), 3290 states have internal predecessors, (4035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:45,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3291 states to 3291 states and 4035 transitions. [2021-10-29 05:06:45,651 INFO L78 Accepts]: Start accepts. Automaton has 3291 states and 4035 transitions. Word has length 75 [2021-10-29 05:06:45,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:06:45,651 INFO L470 AbstractCegarLoop]: Abstraction has 3291 states and 4035 transitions. [2021-10-29 05:06:45,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:45,651 INFO L276 IsEmpty]: Start isEmpty. Operand 3291 states and 4035 transitions. [2021-10-29 05:06:45,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-29 05:06:45,654 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:06:45,654 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:06:45,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-29 05:06:45,654 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:06:45,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:06:45,655 INFO L85 PathProgramCache]: Analyzing trace with hash 228133449, now seen corresponding path program 1 times [2021-10-29 05:06:45,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:06:45,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951406146] [2021-10-29 05:06:45,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:45,656 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:06:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:45,711 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:06:45,711 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:06:45,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951406146] [2021-10-29 05:06:45,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951406146] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 05:06:45,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34305498] [2021-10-29 05:06:45,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:45,712 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:06:45,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:06:45,734 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:06:45,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-29 05:06:45,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:45,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-29 05:06:45,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:06:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:06:46,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:06:46,480 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:06:46,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34305498] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:06:46,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-29 05:06:46,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 4] imperfect sequences [4] total 12 [2021-10-29 05:06:46,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939953360] [2021-10-29 05:06:46,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-29 05:06:46,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:06:46,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-29 05:06:46,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-29 05:06:46,483 INFO L87 Difference]: Start difference. First operand 3291 states and 4035 transitions. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:47,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:06:47,325 INFO L93 Difference]: Finished difference Result 7372 states and 9115 transitions. [2021-10-29 05:06:47,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-29 05:06:47,325 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 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 75 [2021-10-29 05:06:47,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:06:47,331 INFO L225 Difference]: With dead ends: 7372 [2021-10-29 05:06:47,331 INFO L226 Difference]: Without dead ends: 4409 [2021-10-29 05:06:47,334 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-10-29 05:06:47,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4409 states. [2021-10-29 05:06:47,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4409 to 2542. [2021-10-29 05:06:47,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2542 states, 2541 states have (on average 1.2239275875639513) internal successors, (3110), 2541 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:47,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2542 states to 2542 states and 3110 transitions. [2021-10-29 05:06:47,531 INFO L78 Accepts]: Start accepts. Automaton has 2542 states and 3110 transitions. Word has length 75 [2021-10-29 05:06:47,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:06:47,531 INFO L470 AbstractCegarLoop]: Abstraction has 2542 states and 3110 transitions. [2021-10-29 05:06:47,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:47,532 INFO L276 IsEmpty]: Start isEmpty. Operand 2542 states and 3110 transitions. [2021-10-29 05:06:47,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-29 05:06:47,536 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:06:47,537 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:06:47,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-29 05:06:47,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-29 05:06:47,746 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:06:47,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:06:47,746 INFO L85 PathProgramCache]: Analyzing trace with hash 260632163, now seen corresponding path program 1 times [2021-10-29 05:06:47,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:06:47,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545212264] [2021-10-29 05:06:47,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:47,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:06:47,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:47,851 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:06:47,851 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:06:47,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545212264] [2021-10-29 05:06:47,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545212264] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 05:06:47,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346575033] [2021-10-29 05:06:47,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:47,852 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:06:47,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:06:47,853 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:06:47,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-29 05:06:48,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:48,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-29 05:06:48,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:06:48,394 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-29 05:06:48,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:06:48,602 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-29 05:06:48,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346575033] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:06:48,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-29 05:06:48,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 8 [2021-10-29 05:06:48,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908566217] [2021-10-29 05:06:48,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-29 05:06:48,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:06:48,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-29 05:06:48,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-29 05:06:48,605 INFO L87 Difference]: Start difference. First operand 2542 states and 3110 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:48,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:06:48,954 INFO L93 Difference]: Finished difference Result 5303 states and 6488 transitions. [2021-10-29 05:06:48,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-29 05:06:48,955 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 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 76 [2021-10-29 05:06:48,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:06:48,961 INFO L225 Difference]: With dead ends: 5303 [2021-10-29 05:06:48,961 INFO L226 Difference]: Without dead ends: 3281 [2021-10-29 05:06:48,964 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:06:48,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3281 states. [2021-10-29 05:06:49,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3281 to 2126. [2021-10-29 05:06:49,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 1.2004705882352942) internal successors, (2551), 2125 states have internal predecessors, (2551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:49,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 2551 transitions. [2021-10-29 05:06:49,147 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 2551 transitions. Word has length 76 [2021-10-29 05:06:49,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:06:49,147 INFO L470 AbstractCegarLoop]: Abstraction has 2126 states and 2551 transitions. [2021-10-29 05:06:49,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:49,148 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 2551 transitions. [2021-10-29 05:06:49,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-29 05:06:49,151 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:06:49,151 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:06:49,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-29 05:06:49,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-29 05:06:49,374 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:06:49,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:06:49,374 INFO L85 PathProgramCache]: Analyzing trace with hash 762478353, now seen corresponding path program 1 times [2021-10-29 05:06:49,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:06:49,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170041408] [2021-10-29 05:06:49,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:49,374 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:06:49,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:06:49,448 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:06:49,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170041408] [2021-10-29 05:06:49,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170041408] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 05:06:49,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836812473] [2021-10-29 05:06:49,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:49,449 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:06:49,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:06:49,450 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:06:49,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-29 05:06:49,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:49,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-29 05:06:49,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:06:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:06:50,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:06:50,688 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:06:50,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836812473] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-29 05:06:50,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-10-29 05:06:50,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 6] total 11 [2021-10-29 05:06:50,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751284941] [2021-10-29 05:06:50,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:06:50,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:06:50,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:06:50,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-10-29 05:06:50,690 INFO L87 Difference]: Start difference. First operand 2126 states and 2551 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:51,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:06:51,171 INFO L93 Difference]: Finished difference Result 4897 states and 5939 transitions. [2021-10-29 05:06:51,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 05:06:51,172 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-10-29 05:06:51,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:06:51,176 INFO L225 Difference]: With dead ends: 4897 [2021-10-29 05:06:51,176 INFO L226 Difference]: Without dead ends: 3206 [2021-10-29 05:06:51,178 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-10-29 05:06:51,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3206 states. [2021-10-29 05:06:51,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3206 to 3202. [2021-10-29 05:06:51,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3202 states, 3201 states have (on average 1.2068103717588254) internal successors, (3863), 3201 states have internal predecessors, (3863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:51,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3202 states to 3202 states and 3863 transitions. [2021-10-29 05:06:51,457 INFO L78 Accepts]: Start accepts. Automaton has 3202 states and 3863 transitions. Word has length 77 [2021-10-29 05:06:51,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:06:51,458 INFO L470 AbstractCegarLoop]: Abstraction has 3202 states and 3863 transitions. [2021-10-29 05:06:51,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:51,458 INFO L276 IsEmpty]: Start isEmpty. Operand 3202 states and 3863 transitions. [2021-10-29 05:06:51,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-29 05:06:51,461 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:06:51,461 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:06:51,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-29 05:06:51,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-29 05:06:51,666 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:06:51,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:06:51,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1858291132, now seen corresponding path program 1 times [2021-10-29 05:06:51,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:06:51,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274406519] [2021-10-29 05:06:51,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:51,667 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:06:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:51,741 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:06:51,742 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:06:51,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274406519] [2021-10-29 05:06:51,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274406519] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 05:06:51,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271604438] [2021-10-29 05:06:51,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:51,743 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:06:51,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:06:51,744 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:06:51,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-29 05:06:52,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:52,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-29 05:06:52,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:06:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-29 05:06:52,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:06:53,315 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-29 05:06:53,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271604438] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:06:53,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-29 05:06:53,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 5] imperfect sequences [4] total 8 [2021-10-29 05:06:53,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003511827] [2021-10-29 05:06:53,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-29 05:06:53,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:06:53,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-29 05:06:53,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:06:53,317 INFO L87 Difference]: Start difference. First operand 3202 states and 3863 transitions. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:53,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:06:53,671 INFO L93 Difference]: Finished difference Result 5159 states and 6246 transitions. [2021-10-29 05:06:53,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-29 05:06:53,672 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 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 77 [2021-10-29 05:06:53,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:06:53,674 INFO L225 Difference]: With dead ends: 5159 [2021-10-29 05:06:53,675 INFO L226 Difference]: Without dead ends: 2444 [2021-10-29 05:06:53,677 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-10-29 05:06:53,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2021-10-29 05:06:53,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 2122. [2021-10-29 05:06:53,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2122 states, 2121 states have (on average 1.1966053748231966) internal successors, (2538), 2121 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:53,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2122 states to 2122 states and 2538 transitions. [2021-10-29 05:06:53,843 INFO L78 Accepts]: Start accepts. Automaton has 2122 states and 2538 transitions. Word has length 77 [2021-10-29 05:06:53,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:06:53,844 INFO L470 AbstractCegarLoop]: Abstraction has 2122 states and 2538 transitions. [2021-10-29 05:06:53,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:53,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2122 states and 2538 transitions. [2021-10-29 05:06:53,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-29 05:06:53,846 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:06:53,846 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:06:53,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-29 05:06:54,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-29 05:06:54,047 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:06:54,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:06:54,047 INFO L85 PathProgramCache]: Analyzing trace with hash -671934434, now seen corresponding path program 1 times [2021-10-29 05:06:54,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:06:54,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453757705] [2021-10-29 05:06:54,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:54,048 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:06:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:54,126 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:06:54,126 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:06:54,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453757705] [2021-10-29 05:06:54,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453757705] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 05:06:54,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516657007] [2021-10-29 05:06:54,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:54,128 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 05:06:54,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:06:54,129 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 05:06:54,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-29 05:06:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:06:54,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-29 05:06:54,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:06:55,052 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-29 05:06:55,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:06:55,742 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-29 05:06:55,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516657007] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:06:55,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-29 05:06:55,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 5] imperfect sequences [4] total 8 [2021-10-29 05:06:55,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676253974] [2021-10-29 05:06:55,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-29 05:06:55,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:06:55,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-29 05:06:55,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-29 05:06:55,745 INFO L87 Difference]: Start difference. First operand 2122 states and 2538 transitions. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:56,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:06:56,096 INFO L93 Difference]: Finished difference Result 3320 states and 4018 transitions. [2021-10-29 05:06:56,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-29 05:06:56,097 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 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 77 [2021-10-29 05:06:56,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:06:56,099 INFO L225 Difference]: With dead ends: 3320 [2021-10-29 05:06:56,100 INFO L226 Difference]: Without dead ends: 2783 [2021-10-29 05:06:56,101 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-29 05:06:56,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2021-10-29 05:06:56,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2122. [2021-10-29 05:06:56,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2122 states, 2121 states have (on average 1.1937765205091937) internal successors, (2532), 2121 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:56,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2122 states to 2122 states and 2532 transitions. [2021-10-29 05:06:56,267 INFO L78 Accepts]: Start accepts. Automaton has 2122 states and 2532 transitions. Word has length 77 [2021-10-29 05:06:56,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:06:56,267 INFO L470 AbstractCegarLoop]: Abstraction has 2122 states and 2532 transitions. [2021-10-29 05:06:56,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:06:56,268 INFO L276 IsEmpty]: Start isEmpty. Operand 2122 states and 2532 transitions. [2021-10-29 05:06:56,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-10-29 05:06:56,269 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:06:56,269 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:06:56,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-29 05:06:56,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-29 05:06:56,470 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 05:06:56,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:06:56,471 INFO L85 PathProgramCache]: Analyzing trace with hash 247564691, now seen corresponding path program 1 times [2021-10-29 05:06:56,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:06:56,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900627991] [2021-10-29 05:06:56,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:06:56,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:06:56,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:06:56,505 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 05:06:56,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:06:56,615 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-29 05:06:56,615 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-29 05:06:56,616 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 05:06:56,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-10-29 05:06:56,622 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:06:56,626 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 05:06:56,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 05:06:56 BoogieIcfgContainer [2021-10-29 05:06:56,817 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 05:06:56,822 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 05:06:56,822 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 05:06:56,822 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 05:06:56,823 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:06:24" (3/4) ... [2021-10-29 05:06:56,825 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-29 05:06:57,023 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/witness.graphml [2021-10-29 05:06:57,024 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 05:06:57,025 INFO L168 Benchmark]: Toolchain (without parser) took 35186.77 ms. Allocated memory was 81.8 MB in the beginning and 1.8 GB in the end (delta: 1.7 GB). Free memory was 43.3 MB in the beginning and 750.5 MB in the end (delta: -707.3 MB). Peak memory consumption was 977.7 MB. Max. memory is 16.1 GB. [2021-10-29 05:06:57,026 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 81.8 MB. Free memory was 60.0 MB in the beginning and 60.0 MB in the end (delta: 62.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:06:57,027 INFO L168 Benchmark]: CACSL2BoogieTranslator took 476.03 ms. Allocated memory was 81.8 MB in the beginning and 109.1 MB in the end (delta: 27.3 MB). Free memory was 43.1 MB in the beginning and 83.5 MB in the end (delta: -40.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 16.1 GB. [2021-10-29 05:06:57,027 INFO L168 Benchmark]: Boogie Procedure Inliner took 75.85 ms. Allocated memory is still 109.1 MB. Free memory was 83.5 MB in the beginning and 80.1 MB in the end (delta: 3.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-29 05:06:57,028 INFO L168 Benchmark]: Boogie Preprocessor took 74.71 ms. Allocated memory is still 109.1 MB. Free memory was 80.1 MB in the beginning and 77.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:06:57,028 INFO L168 Benchmark]: RCFGBuilder took 2341.10 ms. Allocated memory is still 109.1 MB. Free memory was 77.2 MB in the beginning and 73.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 59.8 MB. Max. memory is 16.1 GB. [2021-10-29 05:06:57,029 INFO L168 Benchmark]: TraceAbstraction took 31994.05 ms. Allocated memory was 109.1 MB in the beginning and 1.8 GB in the end (delta: 1.7 GB). Free memory was 72.3 MB in the beginning and 769.4 MB in the end (delta: -697.1 MB). Peak memory consumption was 957.8 MB. Max. memory is 16.1 GB. [2021-10-29 05:06:57,029 INFO L168 Benchmark]: Witness Printer took 202.41 ms. Allocated memory is still 1.8 GB. Free memory was 769.4 MB in the beginning and 750.5 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-29 05:06:57,032 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 81.8 MB. Free memory was 60.0 MB in the beginning and 60.0 MB in the end (delta: 62.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 476.03 ms. Allocated memory was 81.8 MB in the beginning and 109.1 MB in the end (delta: 27.3 MB). Free memory was 43.1 MB in the beginning and 83.5 MB in the end (delta: -40.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 75.85 ms. Allocated memory is still 109.1 MB. Free memory was 83.5 MB in the beginning and 80.1 MB in the end (delta: 3.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 74.71 ms. Allocated memory is still 109.1 MB. Free memory was 80.1 MB in the beginning and 77.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2341.10 ms. Allocated memory is still 109.1 MB. Free memory was 77.2 MB in the beginning and 73.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 59.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 31994.05 ms. Allocated memory was 109.1 MB in the beginning and 1.8 GB in the end (delta: 1.7 GB). Free memory was 72.3 MB in the beginning and 769.4 MB in the end (delta: -697.1 MB). Peak memory consumption was 957.8 MB. Max. memory is 16.1 GB. * Witness Printer took 202.41 ms. Allocated memory is still 1.8 GB. Free memory was 769.4 MB in the beginning and 750.5 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int m_pc = 0; [L18] int t1_pc = 0; [L19] int t2_pc = 0; [L20] int t3_pc = 0; [L21] int m_st ; [L22] int t1_st ; [L23] int t2_st ; [L24] int t3_st ; [L25] int m_i ; [L26] int t1_i ; [L27] int t2_i ; [L28] int t3_i ; [L29] int M_E = 2; [L30] int T1_E = 2; [L31] int T2_E = 2; [L32] int T3_E = 2; [L33] int E_1 = 2; [L34] int E_2 = 2; [L35] int E_3 = 2; [L689] int __retres1 ; [L602] m_i = 1 [L603] t1_i = 1 [L604] t2_i = 1 [L605] t3_i = 1 [L630] int kernel_st ; [L631] int tmp ; [L632] int tmp___0 ; [L636] kernel_st = 0 [L273] COND TRUE m_i == 1 [L274] m_st = 0 [L278] COND TRUE t1_i == 1 [L279] t1_st = 0 [L283] COND TRUE t2_i == 1 [L284] t2_st = 0 [L288] COND TRUE t3_i == 1 [L289] t3_st = 0 [L410] COND FALSE !(M_E == 0) [L415] COND FALSE !(T1_E == 0) [L420] COND FALSE !(T2_E == 0) [L425] COND FALSE !(T3_E == 0) [L430] COND FALSE !(E_1 == 0) [L435] COND FALSE !(E_2 == 0) [L440] COND FALSE !(E_3 == 0) [L493] int tmp ; [L494] int tmp___0 ; [L495] int tmp___1 ; [L496] int tmp___2 ; [L186] int __retres1 ; VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L189] COND FALSE !(m_pc == 1) VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L199] __retres1 = 0 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L201] return (__retres1); [L500] tmp = is_master_triggered() [L502] COND FALSE !(\read(tmp)) [L205] int __retres1 ; VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L208] COND FALSE !(t1_pc == 1) VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L218] __retres1 = 0 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L220] return (__retres1); [L508] tmp___0 = is_transmit1_triggered() [L510] COND FALSE !(\read(tmp___0)) [L224] int __retres1 ; VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L227] COND FALSE !(t2_pc == 1) VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L237] __retres1 = 0 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L239] return (__retres1); [L516] tmp___1 = is_transmit2_triggered() [L518] COND FALSE !(\read(tmp___1)) [L243] int __retres1 ; VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L246] COND FALSE !(t3_pc == 1) VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L256] __retres1 = 0 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L258] return (__retres1); [L524] tmp___2 = is_transmit3_triggered() [L526] COND FALSE !(\read(tmp___2)) [L453] COND FALSE !(M_E == 1) [L458] COND FALSE !(T1_E == 1) [L463] COND FALSE !(T2_E == 1) [L468] COND FALSE !(T3_E == 1) [L473] COND FALSE !(E_1 == 1) [L478] COND FALSE !(E_2 == 1) [L483] COND FALSE !(E_3 == 1) VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L644] COND TRUE 1 [L647] kernel_st = 1 [L329] int tmp ; VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L333] COND TRUE 1 [L298] int __retres1 ; [L301] COND TRUE m_st == 0 [L302] __retres1 = 1 [L324] return (__retres1); [L336] tmp = exists_runnable_thread() [L338] COND TRUE \read(tmp) VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L343] COND TRUE m_st == 0 [L344] int tmp_ndt_1; [L345] tmp_ndt_1 = __VERIFIER_nondet_int() [L346] COND FALSE !(\read(tmp_ndt_1)) VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L357] COND TRUE t1_st == 0 [L358] int tmp_ndt_2; [L359] tmp_ndt_2 = __VERIFIER_nondet_int() [L360] COND TRUE \read(tmp_ndt_2) [L362] t1_st = 1 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=1, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L86] COND TRUE t1_pc == 0 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=1, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L97] COND TRUE 1 [L99] t1_pc = 1 [L100] t1_st = 2 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L371] COND TRUE t2_st == 0 [L372] int tmp_ndt_3; [L373] tmp_ndt_3 = __VERIFIER_nondet_int() [L374] COND TRUE \read(tmp_ndt_3) [L376] t2_st = 1 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=0, t2_st=1, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L121] COND TRUE t2_pc == 0 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=0, t2_st=1, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L132] COND TRUE 1 [L134] t2_pc = 1 [L135] t2_st = 2 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=0, t3_st=0] [L385] COND TRUE t3_st == 0 [L386] int tmp_ndt_4; [L387] tmp_ndt_4 = __VERIFIER_nondet_int() [L388] COND TRUE \read(tmp_ndt_4) [L390] t3_st = 1 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=0, t3_st=1] [L156] COND TRUE t3_pc == 0 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=0, t3_st=1] [L167] COND TRUE 1 [L169] t3_pc = 1 [L170] t3_st = 2 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L333] COND TRUE 1 [L298] int __retres1 ; [L301] COND TRUE m_st == 0 [L302] __retres1 = 1 [L324] return (__retres1); [L336] tmp = exists_runnable_thread() [L338] COND TRUE \read(tmp) VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L343] COND TRUE m_st == 0 [L344] int tmp_ndt_1; [L345] tmp_ndt_1 = __VERIFIER_nondet_int() [L346] COND TRUE \read(tmp_ndt_1) [L348] m_st = 1 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L45] COND TRUE m_pc == 0 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L56] COND TRUE 1 [L59] E_1 = 1 [L493] int tmp ; [L494] int tmp___0 ; [L495] int tmp___1 ; [L496] int tmp___2 ; [L186] int __retres1 ; VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L189] COND FALSE !(m_pc == 1) VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L199] __retres1 = 0 VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L201] return (__retres1); [L500] tmp = is_master_triggered() [L502] COND FALSE !(\read(tmp)) [L205] int __retres1 ; VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L208] COND TRUE t1_pc == 1 VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L209] COND TRUE E_1 == 1 [L210] __retres1 = 1 VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L220] return (__retres1); [L508] tmp___0 = is_transmit1_triggered() [L510] COND TRUE \read(tmp___0) [L511] t1_st = 0 [L224] int __retres1 ; VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L227] COND TRUE t2_pc == 1 VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L228] COND FALSE !(E_2 == 1) VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L237] __retres1 = 0 VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L239] return (__retres1); [L516] tmp___1 = is_transmit2_triggered() [L518] COND FALSE !(\read(tmp___1)) [L243] int __retres1 ; VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L246] COND TRUE t3_pc == 1 VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L247] COND FALSE !(E_3 == 1) VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L256] __retres1 = 0 VAL [E_1=1, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L258] return (__retres1); [L524] tmp___2 = is_transmit3_triggered() [L526] COND FALSE !(\read(tmp___2)) [L61] E_1 = 2 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L64] COND TRUE 1 [L66] m_pc = 1 [L67] m_st = 2 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L357] COND TRUE t1_st == 0 [L358] int tmp_ndt_2; [L359] tmp_ndt_2 = __VERIFIER_nondet_int() [L360] COND TRUE \read(tmp_ndt_2) [L362] t1_st = 1 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L86] COND FALSE !(t1_pc == 0) VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L89] COND TRUE t1_pc == 1 [L105] E_2 = 1 [L493] int tmp ; [L494] int tmp___0 ; [L495] int tmp___1 ; [L496] int tmp___2 ; [L186] int __retres1 ; VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L189] COND TRUE m_pc == 1 VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L190] COND FALSE !(M_E == 1) VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L199] __retres1 = 0 VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L201] return (__retres1); [L500] tmp = is_master_triggered() [L502] COND FALSE !(\read(tmp)) [L205] int __retres1 ; VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L208] COND TRUE t1_pc == 1 VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L209] COND FALSE !(E_1 == 1) VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L218] __retres1 = 0 VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L220] return (__retres1); [L508] tmp___0 = is_transmit1_triggered() [L510] COND FALSE !(\read(tmp___0)) [L224] int __retres1 ; VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L227] COND TRUE t2_pc == 1 VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L228] COND TRUE E_2 == 1 [L229] __retres1 = 1 VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L239] return (__retres1); [L516] tmp___1 = is_transmit2_triggered() [L518] COND TRUE \read(tmp___1) [L519] t2_st = 0 [L243] int __retres1 ; VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L246] COND TRUE t3_pc == 1 VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L247] COND FALSE !(E_3 == 1) VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L256] __retres1 = 0 VAL [E_1=2, E_2=1, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L258] return (__retres1); [L524] tmp___2 = is_transmit3_triggered() [L526] COND FALSE !(\read(tmp___2)) [L107] E_2 = 2 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L97] COND TRUE 1 [L99] t1_pc = 1 [L100] t1_st = 2 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L371] COND TRUE t2_st == 0 [L372] int tmp_ndt_3; [L373] tmp_ndt_3 = __VERIFIER_nondet_int() [L374] COND TRUE \read(tmp_ndt_3) [L376] t2_st = 1 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L121] COND FALSE !(t2_pc == 0) VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L124] COND TRUE t2_pc == 1 [L140] E_3 = 1 [L493] int tmp ; [L494] int tmp___0 ; [L495] int tmp___1 ; [L496] int tmp___2 ; [L186] int __retres1 ; VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L189] COND TRUE m_pc == 1 VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L190] COND FALSE !(M_E == 1) VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L199] __retres1 = 0 VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L201] return (__retres1); [L500] tmp = is_master_triggered() [L502] COND FALSE !(\read(tmp)) [L205] int __retres1 ; VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L208] COND TRUE t1_pc == 1 VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L209] COND FALSE !(E_1 == 1) VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L218] __retres1 = 0 VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L220] return (__retres1); [L508] tmp___0 = is_transmit1_triggered() [L510] COND FALSE !(\read(tmp___0)) [L224] int __retres1 ; VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L227] COND TRUE t2_pc == 1 VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L228] COND FALSE !(E_2 == 1) VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L237] __retres1 = 0 VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L239] return (__retres1); [L516] tmp___1 = is_transmit2_triggered() [L518] COND FALSE !(\read(tmp___1)) [L243] int __retres1 ; VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L246] COND TRUE t3_pc == 1 VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L247] COND TRUE E_3 == 1 [L248] __retres1 = 1 VAL [E_1=2, E_2=2, E_3=1, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2] [L258] return (__retres1); [L524] tmp___2 = is_transmit3_triggered() [L526] COND TRUE \read(tmp___2) [L527] t3_st = 0 [L142] E_3 = 2 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=0] [L132] COND TRUE 1 [L134] t2_pc = 1 [L135] t2_st = 2 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=0] [L385] COND TRUE t3_st == 0 [L386] int tmp_ndt_4; [L387] tmp_ndt_4 = __VERIFIER_nondet_int() [L388] COND TRUE \read(tmp_ndt_4) [L390] t3_st = 1 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1] [L156] COND FALSE !(t3_pc == 0) VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1] [L159] COND TRUE t3_pc == 1 VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1] [L13] reach_error() VAL [E_1=2, E_2=2, E_3=2, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 129 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 31.7s, OverallIterations: 29, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.2s, AutomataDifference: 11.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 6217 SDtfs, 7792 SDslu, 7837 SDs, 0 SdLazy, 1353 SolverSat, 362 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1195 GetRequests, 1072 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9118occurred in iteration=15, InterpolantAutomatonStates: 147, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 7.7s AutomataMinimizationTime, 28 MinimizatonAttempts, 24466 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 6.7s InterpolantComputationTime, 2302 NumberOfCodeBlocks, 2302 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 2677 ConstructedInterpolants, 0 QuantifiedInterpolants, 7718 SizeOfPredicates, 36 NumberOfNonLiveVariables, 2457 ConjunctsInSsa, 94 ConjunctsInUnsatCore, 42 InterpolantComputations, 34 PerfectInterpolantSequences, 531/545 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-29 05:06:57,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ac4a2aa-da99-4c0a-b353-e263629c975f/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...