./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label16.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label16.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs --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 7e11d8418d66c155e68d9d199cd8b46e2b8065a5 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:07:35,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:07:35,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:07:35,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:07:35,380 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:07:35,382 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:07:35,384 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:07:35,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:07:35,390 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:07:35,392 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:07:35,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:07:35,396 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:07:35,396 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:07:35,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:07:35,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:07:35,402 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:07:35,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:07:35,405 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:07:35,408 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:07:35,411 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:07:35,413 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:07:35,415 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:07:35,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:07:35,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:07:35,423 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:07:35,424 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:07:35,425 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:07:35,426 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:07:35,427 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:07:35,429 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:07:35,429 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:07:35,430 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:07:35,432 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:07:35,433 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:07:35,434 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:07:35,436 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:07:35,438 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:07:35,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:07:35,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:07:35,441 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:07:35,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:07:35,443 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:07:35,497 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:07:35,500 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:07:35,502 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:07:35,503 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:07:35,503 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:07:35,503 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:07:35,504 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:07:35,504 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:07:35,511 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:07:35,511 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:07:35,511 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:07:35,511 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:07:35,512 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:07:35,512 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:07:35,512 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:07:35,513 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:07:35,513 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:07:35,513 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:07:35,514 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:07:35,514 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:07:35,514 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:07:35,514 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:07:35,515 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:07:35,515 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:07:35,515 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:07:35,515 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:07:35,515 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:07:35,516 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:07:35,516 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:07:35,516 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:07:35,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:07:35,517 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:07:35,517 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:07:35,517 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:07:35,517 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:07:35,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:07:35,518 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:07:35,518 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:07:35,518 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:07:35,518 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_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e11d8418d66c155e68d9d199cd8b46e2b8065a5 [2021-10-16 02:07:35,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:07:35,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:07:35,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:07:35,902 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:07:35,903 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:07:35,905 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/eca-rers2012/Problem03_label16.c [2021-10-16 02:07:36,007 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/data/4cd65d650/31e3d3daa4444ad2955e231daeeee159/FLAGaf323d70b [2021-10-16 02:07:36,945 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:07:36,946 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/sv-benchmarks/c/eca-rers2012/Problem03_label16.c [2021-10-16 02:07:36,976 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/data/4cd65d650/31e3d3daa4444ad2955e231daeeee159/FLAGaf323d70b [2021-10-16 02:07:37,047 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/data/4cd65d650/31e3d3daa4444ad2955e231daeeee159 [2021-10-16 02:07:37,052 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:07:37,055 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:07:37,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:07:37,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:07:37,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:07:37,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:07:37" (1/1) ... [2021-10-16 02:07:37,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f8083e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:07:37, skipping insertion in model container [2021-10-16 02:07:37,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:07:37" (1/1) ... [2021-10-16 02:07:37,079 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:07:37,185 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:07:38,004 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_c6452912-08d3-4625-b79d-4e92e6b9f69d/sv-benchmarks/c/eca-rers2012/Problem03_label16.c[56490,56503] [2021-10-16 02:07:38,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:07:38,057 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:07:38,460 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_c6452912-08d3-4625-b79d-4e92e6b9f69d/sv-benchmarks/c/eca-rers2012/Problem03_label16.c[56490,56503] [2021-10-16 02:07:38,478 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:07:38,501 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:07:38,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:07:38 WrapperNode [2021-10-16 02:07:38,502 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:07:38,504 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:07:38,504 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:07:38,504 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:07:38,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:07:38" (1/1) ... [2021-10-16 02:07:38,578 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:07:38" (1/1) ... [2021-10-16 02:07:38,720 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:07:38,721 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:07:38,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:07:38,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:07:38,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:07:38" (1/1) ... [2021-10-16 02:07:38,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:07:38" (1/1) ... [2021-10-16 02:07:38,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:07:38" (1/1) ... [2021-10-16 02:07:38,744 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:07:38" (1/1) ... [2021-10-16 02:07:38,810 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:07:38" (1/1) ... [2021-10-16 02:07:38,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:07:38" (1/1) ... [2021-10-16 02:07:38,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:07:38" (1/1) ... [2021-10-16 02:07:38,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:07:38,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:07:38,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:07:38,859 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:07:38,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:07:38" (1/1) ... [2021-10-16 02:07:38,876 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:07:38,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:07:38,921 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:07:38,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:07:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:07:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:07:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:07:38,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:07:42,327 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:07:42,327 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-16 02:07:42,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:07:42 BoogieIcfgContainer [2021-10-16 02:07:42,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:07:42,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:07:42,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:07:42,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:07:42,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:07:37" (1/3) ... [2021-10-16 02:07:42,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58bb5e4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:07:42, skipping insertion in model container [2021-10-16 02:07:42,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:07:38" (2/3) ... [2021-10-16 02:07:42,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58bb5e4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:07:42, skipping insertion in model container [2021-10-16 02:07:42,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:07:42" (3/3) ... [2021-10-16 02:07:42,342 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label16.c [2021-10-16 02:07:42,349 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:07:42,350 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:07:42,424 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:07:42,436 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, mConcurrency=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 [2021-10-16 02:07:42,436 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:07:42,465 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:07:42,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-10-16 02:07:42,489 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:07:42,490 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:07:42,491 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:07:42,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:07:42,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1724864008, now seen corresponding path program 1 times [2021-10-16 02:07:42,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:07:42,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687942323] [2021-10-16 02:07:42,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:07:42,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:07:42,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:07:43,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:07:43,172 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:07:43,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687942323] [2021-10-16 02:07:43,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687942323] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:07:43,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:07:43,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:07:43,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983230351] [2021-10-16 02:07:43,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:07:43,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:07:43,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:07:43,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:07:43,203 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 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 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:07:44,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:07:44,296 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2021-10-16 02:07:44,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:07:44,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 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 143 [2021-10-16 02:07:44,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:07:44,328 INFO L225 Difference]: With dead ends: 440 [2021-10-16 02:07:44,330 INFO L226 Difference]: Without dead ends: 289 [2021-10-16 02:07:44,336 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:07:44,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-10-16 02:07:44,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2021-10-16 02:07:44,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.8090277777777777) internal successors, (521), 288 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:07:44,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 521 transitions. [2021-10-16 02:07:44,435 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 521 transitions. Word has length 143 [2021-10-16 02:07:44,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:07:44,440 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 521 transitions. [2021-10-16 02:07:44,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:07:44,441 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 521 transitions. [2021-10-16 02:07:44,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-10-16 02:07:44,446 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:07:44,446 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:07:44,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:07:44,447 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:07:44,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:07:44,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1763838799, now seen corresponding path program 1 times [2021-10-16 02:07:44,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:07:44,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457788068] [2021-10-16 02:07:44,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:07:44,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:07:44,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:07:44,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:07:44,571 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:07:44,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457788068] [2021-10-16 02:07:44,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457788068] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:07:44,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:07:44,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:07:44,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326054555] [2021-10-16 02:07:44,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:07:44,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:07:44,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:07:44,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:07:44,577 INFO L87 Difference]: Start difference. First operand 289 states and 521 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:07:45,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:07:45,503 INFO L93 Difference]: Finished difference Result 865 states and 1561 transitions. [2021-10-16 02:07:45,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:07:45,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 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 147 [2021-10-16 02:07:45,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:07:45,510 INFO L225 Difference]: With dead ends: 865 [2021-10-16 02:07:45,510 INFO L226 Difference]: Without dead ends: 577 [2021-10-16 02:07:45,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:07:45,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-10-16 02:07:45,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 575. [2021-10-16 02:07:45,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.7822299651567943) internal successors, (1023), 574 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:07:45,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1023 transitions. [2021-10-16 02:07:45,560 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1023 transitions. Word has length 147 [2021-10-16 02:07:45,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:07:45,560 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 1023 transitions. [2021-10-16 02:07:45,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:07:45,561 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1023 transitions. [2021-10-16 02:07:45,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-10-16 02:07:45,567 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:07:45,568 INFO L512 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:07:45,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 02:07:45,568 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:07:45,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:07:45,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1826151602, now seen corresponding path program 1 times [2021-10-16 02:07:45,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:07:45,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351499448] [2021-10-16 02:07:45,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:07:45,571 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:07:45,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:07:45,772 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:07:45,778 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:07:45,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351499448] [2021-10-16 02:07:45,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351499448] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:07:45,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435757912] [2021-10-16 02:07:45,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:07:45,780 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:07:45,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:07:45,784 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:07:45,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:07:46,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:07:46,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:07:46,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:07:46,654 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:07:46,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:07:47,127 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:07:47,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435757912] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:07:47,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:07:47,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [3] total 4 [2021-10-16 02:07:47,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404785941] [2021-10-16 02:07:47,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:07:47,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:07:47,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:07:47,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:07:47,135 INFO L87 Difference]: Start difference. First operand 575 states and 1023 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:07:48,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:07:48,065 INFO L93 Difference]: Finished difference Result 1721 states and 3066 transitions. [2021-10-16 02:07:48,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:07:48,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 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 154 [2021-10-16 02:07:48,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:07:48,075 INFO L225 Difference]: With dead ends: 1721 [2021-10-16 02:07:48,076 INFO L226 Difference]: Without dead ends: 1147 [2021-10-16 02:07:48,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 305 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:07:48,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-10-16 02:07:48,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 861. [2021-10-16 02:07:48,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 1.7) internal successors, (1462), 860 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:07:48,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1462 transitions. [2021-10-16 02:07:48,128 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1462 transitions. Word has length 154 [2021-10-16 02:07:48,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:07:48,128 INFO L470 AbstractCegarLoop]: Abstraction has 861 states and 1462 transitions. [2021-10-16 02:07:48,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:07:48,129 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1462 transitions. [2021-10-16 02:07:48,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-10-16 02:07:48,133 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:07:48,133 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:07:48,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:07:48,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:07:48,356 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:07:48,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:07:48,356 INFO L82 PathProgramCache]: Analyzing trace with hash -546834578, now seen corresponding path program 1 times [2021-10-16 02:07:48,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:07:48,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213352950] [2021-10-16 02:07:48,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:07:48,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:07:48,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:07:48,523 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:07:48,523 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:07:48,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213352950] [2021-10-16 02:07:48,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213352950] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:07:48,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:07:48,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:07:48,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617246028] [2021-10-16 02:07:48,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:07:48,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:07:48,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:07:48,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:07:48,539 INFO L87 Difference]: Start difference. First operand 861 states and 1462 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:07:49,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:07:49,529 INFO L93 Difference]: Finished difference Result 2579 states and 4383 transitions. [2021-10-16 02:07:49,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:07:49,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-10-16 02:07:49,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:07:49,544 INFO L225 Difference]: With dead ends: 2579 [2021-10-16 02:07:49,544 INFO L226 Difference]: Without dead ends: 1719 [2021-10-16 02:07:49,546 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:07:49,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2021-10-16 02:07:49,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1719. [2021-10-16 02:07:49,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.6536670547147847) internal successors, (2841), 1718 states have internal predecessors, (2841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:07:49,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2841 transitions. [2021-10-16 02:07:49,615 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2841 transitions. Word has length 155 [2021-10-16 02:07:49,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:07:49,615 INFO L470 AbstractCegarLoop]: Abstraction has 1719 states and 2841 transitions. [2021-10-16 02:07:49,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:07:49,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2841 transitions. [2021-10-16 02:07:49,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-10-16 02:07:49,622 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:07:49,622 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:07:49,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-16 02:07:49,623 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:07:49,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:07:49,624 INFO L82 PathProgramCache]: Analyzing trace with hash 37008849, now seen corresponding path program 1 times [2021-10-16 02:07:49,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:07:49,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076089267] [2021-10-16 02:07:49,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:07:49,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:07:49,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:07:49,718 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-16 02:07:49,719 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:07:49,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076089267] [2021-10-16 02:07:49,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076089267] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:07:49,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:07:49,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:07:49,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457686410] [2021-10-16 02:07:49,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:07:49,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:07:49,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:07:49,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:07:49,723 INFO L87 Difference]: Start difference. First operand 1719 states and 2841 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:07:50,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:07:50,788 INFO L93 Difference]: Finished difference Result 5153 states and 8520 transitions. [2021-10-16 02:07:50,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:07:50,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2021-10-16 02:07:50,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:07:50,815 INFO L225 Difference]: With dead ends: 5153 [2021-10-16 02:07:50,815 INFO L226 Difference]: Without dead ends: 3435 [2021-10-16 02:07:50,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:07:50,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2021-10-16 02:07:50,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 3435. [2021-10-16 02:07:50,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 1.4953407105416423) internal successors, (5135), 3434 states have internal predecessors, (5135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:07:50,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 5135 transitions. [2021-10-16 02:07:50,945 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 5135 transitions. Word has length 162 [2021-10-16 02:07:50,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:07:50,946 INFO L470 AbstractCegarLoop]: Abstraction has 3435 states and 5135 transitions. [2021-10-16 02:07:50,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:07:50,951 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 5135 transitions. [2021-10-16 02:07:50,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-10-16 02:07:50,960 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:07:50,960 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:07:50,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-16 02:07:50,962 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:07:50,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:07:50,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1836477602, now seen corresponding path program 1 times [2021-10-16 02:07:50,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:07:50,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079524952] [2021-10-16 02:07:50,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:07:50,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:07:51,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:07:51,089 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:07:51,089 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:07:51,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079524952] [2021-10-16 02:07:51,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079524952] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:07:51,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:07:51,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:07:51,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312957244] [2021-10-16 02:07:51,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:07:51,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:07:51,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:07:51,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:07:51,105 INFO L87 Difference]: Start difference. First operand 3435 states and 5135 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:07:52,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:07:52,162 INFO L93 Difference]: Finished difference Result 9874 states and 14828 transitions. [2021-10-16 02:07:52,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:07:52,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 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 171 [2021-10-16 02:07:52,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:07:52,210 INFO L225 Difference]: With dead ends: 9874 [2021-10-16 02:07:52,210 INFO L226 Difference]: Without dead ends: 6440 [2021-10-16 02:07:52,216 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:07:52,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6440 states. [2021-10-16 02:07:52,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6440 to 6438. [2021-10-16 02:07:52,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6438 states, 6437 states have (on average 1.4520739474910673) internal successors, (9347), 6437 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) [2021-10-16 02:07:52,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6438 states to 6438 states and 9347 transitions. [2021-10-16 02:07:52,489 INFO L78 Accepts]: Start accepts. Automaton has 6438 states and 9347 transitions. Word has length 171 [2021-10-16 02:07:52,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:07:52,489 INFO L470 AbstractCegarLoop]: Abstraction has 6438 states and 9347 transitions. [2021-10-16 02:07:52,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:07:52,490 INFO L276 IsEmpty]: Start isEmpty. Operand 6438 states and 9347 transitions. [2021-10-16 02:07:52,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-10-16 02:07:52,506 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:07:52,506 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:07:52,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-16 02:07:52,507 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:07:52,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:07:52,507 INFO L82 PathProgramCache]: Analyzing trace with hash -156868154, now seen corresponding path program 1 times [2021-10-16 02:07:52,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:07:52,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119477239] [2021-10-16 02:07:52,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:07:52,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:07:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:07:52,606 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-16 02:07:52,606 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:07:52,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119477239] [2021-10-16 02:07:52,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119477239] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:07:52,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:07:52,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:07:52,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438549912] [2021-10-16 02:07:52,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:07:52,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:07:52,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:07:52,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:07:52,610 INFO L87 Difference]: Start difference. First operand 6438 states and 9347 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:07:53,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:07:53,693 INFO L93 Difference]: Finished difference Result 16879 states and 24866 transitions. [2021-10-16 02:07:53,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:07:53,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 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 187 [2021-10-16 02:07:53,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:07:53,785 INFO L225 Difference]: With dead ends: 16879 [2021-10-16 02:07:53,786 INFO L226 Difference]: Without dead ends: 10442 [2021-10-16 02:07:53,796 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:07:53,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10442 states. [2021-10-16 02:07:54,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10442 to 9155. [2021-10-16 02:07:54,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9155 states, 9154 states have (on average 1.355473017260214) internal successors, (12408), 9154 states have internal predecessors, (12408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:07:54,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9155 states to 9155 states and 12408 transitions. [2021-10-16 02:07:54,141 INFO L78 Accepts]: Start accepts. Automaton has 9155 states and 12408 transitions. Word has length 187 [2021-10-16 02:07:54,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:07:54,142 INFO L470 AbstractCegarLoop]: Abstraction has 9155 states and 12408 transitions. [2021-10-16 02:07:54,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:07:54,143 INFO L276 IsEmpty]: Start isEmpty. Operand 9155 states and 12408 transitions. [2021-10-16 02:07:54,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-10-16 02:07:54,161 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:07:54,162 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:07:54,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-16 02:07:54,163 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:07:54,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:07:54,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1919440885, now seen corresponding path program 1 times [2021-10-16 02:07:54,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:07:54,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941654620] [2021-10-16 02:07:54,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:07:54,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:07:54,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:07:54,287 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-10-16 02:07:54,287 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:07:54,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941654620] [2021-10-16 02:07:54,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941654620] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:07:54,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:07:54,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:07:54,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592704636] [2021-10-16 02:07:54,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:07:54,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:07:54,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:07:54,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:07:54,291 INFO L87 Difference]: Start difference. First operand 9155 states and 12408 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:07:55,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:07:55,394 INFO L93 Difference]: Finished difference Result 21455 states and 29154 transitions. [2021-10-16 02:07:55,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:07:55,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 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 197 [2021-10-16 02:07:55,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:07:55,437 INFO L225 Difference]: With dead ends: 21455 [2021-10-16 02:07:55,438 INFO L226 Difference]: Without dead ends: 12301 [2021-10-16 02:07:55,453 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:07:55,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12301 states. [2021-10-16 02:07:55,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12301 to 12158. [2021-10-16 02:07:55,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12158 states, 12157 states have (on average 1.3063255737435222) internal successors, (15881), 12157 states have internal predecessors, (15881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:07:55,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12158 states to 12158 states and 15881 transitions. [2021-10-16 02:07:55,759 INFO L78 Accepts]: Start accepts. Automaton has 12158 states and 15881 transitions. Word has length 197 [2021-10-16 02:07:55,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:07:55,760 INFO L470 AbstractCegarLoop]: Abstraction has 12158 states and 15881 transitions. [2021-10-16 02:07:55,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:07:55,761 INFO L276 IsEmpty]: Start isEmpty. Operand 12158 states and 15881 transitions. [2021-10-16 02:07:55,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-10-16 02:07:55,844 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:07:55,845 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:07:55,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-16 02:07:55,848 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:07:55,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:07:55,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1211888839, now seen corresponding path program 1 times [2021-10-16 02:07:55,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:07:55,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293248131] [2021-10-16 02:07:55,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:07:55,851 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:07:55,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:07:55,980 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-16 02:07:55,980 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:07:55,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293248131] [2021-10-16 02:07:55,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293248131] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:07:55,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:07:55,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:07:55,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465525866] [2021-10-16 02:07:55,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:07:55,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:07:55,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:07:55,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:07:55,991 INFO L87 Difference]: Start difference. First operand 12158 states and 15881 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:07:57,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:07:57,148 INFO L93 Difference]: Finished difference Result 32754 states and 42881 transitions. [2021-10-16 02:07:57,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:07:57,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 211 [2021-10-16 02:07:57,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:07:57,198 INFO L225 Difference]: With dead ends: 32754 [2021-10-16 02:07:57,198 INFO L226 Difference]: Without dead ends: 20883 [2021-10-16 02:07:57,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:07:57,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20883 states. [2021-10-16 02:07:57,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20883 to 20881. [2021-10-16 02:07:57,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20881 states, 20880 states have (on average 1.2989463601532567) internal successors, (27122), 20880 states have internal predecessors, (27122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:07:57,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20881 states to 20881 states and 27122 transitions. [2021-10-16 02:07:57,839 INFO L78 Accepts]: Start accepts. Automaton has 20881 states and 27122 transitions. Word has length 211 [2021-10-16 02:07:57,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:07:57,840 INFO L470 AbstractCegarLoop]: Abstraction has 20881 states and 27122 transitions. [2021-10-16 02:07:57,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:07:57,840 INFO L276 IsEmpty]: Start isEmpty. Operand 20881 states and 27122 transitions. [2021-10-16 02:07:57,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-10-16 02:07:57,869 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:07:57,870 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:07:57,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-16 02:07:57,871 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:07:57,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:07:57,871 INFO L82 PathProgramCache]: Analyzing trace with hash -109257520, now seen corresponding path program 1 times [2021-10-16 02:07:57,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:07:57,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421775155] [2021-10-16 02:07:57,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:07:57,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:07:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:07:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-16 02:07:58,005 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:07:58,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421775155] [2021-10-16 02:07:58,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421775155] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:07:58,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:07:58,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:07:58,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810740749] [2021-10-16 02:07:58,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:07:58,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:07:58,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:07:58,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:07:58,011 INFO L87 Difference]: Start difference. First operand 20881 states and 27122 transitions. Second operand has 4 states, 4 states have (on average 47.0) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:07:59,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:07:59,608 INFO L93 Difference]: Finished difference Result 41189 states and 53587 transitions. [2021-10-16 02:07:59,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:07:59,609 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.0) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 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 213 [2021-10-16 02:07:59,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:07:59,657 INFO L225 Difference]: With dead ends: 41189 [2021-10-16 02:07:59,658 INFO L226 Difference]: Without dead ends: 20881 [2021-10-16 02:07:59,682 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:07:59,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20881 states. [2021-10-16 02:08:00,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20881 to 20309. [2021-10-16 02:08:00,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20309 states, 20308 states have (on average 1.2989954697656096) internal successors, (26380), 20308 states have internal predecessors, (26380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:00,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20309 states to 20309 states and 26380 transitions. [2021-10-16 02:08:00,172 INFO L78 Accepts]: Start accepts. Automaton has 20309 states and 26380 transitions. Word has length 213 [2021-10-16 02:08:00,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:08:00,172 INFO L470 AbstractCegarLoop]: Abstraction has 20309 states and 26380 transitions. [2021-10-16 02:08:00,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.0) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:00,173 INFO L276 IsEmpty]: Start isEmpty. Operand 20309 states and 26380 transitions. [2021-10-16 02:08:00,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-10-16 02:08:00,198 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:08:00,198 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:08:00,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-16 02:08:00,199 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:08:00,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:08:00,200 INFO L82 PathProgramCache]: Analyzing trace with hash 697190771, now seen corresponding path program 1 times [2021-10-16 02:08:00,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:08:00,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650991936] [2021-10-16 02:08:00,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:00,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:08:00,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:00,527 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 88 proven. 6 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-10-16 02:08:00,527 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:08:00,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650991936] [2021-10-16 02:08:00,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650991936] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:08:00,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974341272] [2021-10-16 02:08:00,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:00,528 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:08:00,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:08:00,535 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:08:00,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-16 02:08:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:00,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:08:00,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:08:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-16 02:08:01,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:08:02,115 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-10-16 02:08:02,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974341272] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:08:02,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:08:02,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2021-10-16 02:08:02,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659431294] [2021-10-16 02:08:02,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:08:02,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:08:02,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:08:02,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:08:02,118 INFO L87 Difference]: Start difference. First operand 20309 states and 26380 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:03,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:08:03,183 INFO L93 Difference]: Finished difference Result 41761 states and 54681 transitions. [2021-10-16 02:08:03,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:08:03,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 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 220 [2021-10-16 02:08:03,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:08:03,238 INFO L225 Difference]: With dead ends: 41761 [2021-10-16 02:08:03,238 INFO L226 Difference]: Without dead ends: 21596 [2021-10-16 02:08:03,258 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 437 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:08:03,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21596 states. [2021-10-16 02:08:03,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21596 to 21596. [2021-10-16 02:08:03,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21596 states, 21595 states have (on average 1.2994211623060894) internal successors, (28061), 21595 states have internal predecessors, (28061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:03,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21596 states to 21596 states and 28061 transitions. [2021-10-16 02:08:03,808 INFO L78 Accepts]: Start accepts. Automaton has 21596 states and 28061 transitions. Word has length 220 [2021-10-16 02:08:03,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:08:03,809 INFO L470 AbstractCegarLoop]: Abstraction has 21596 states and 28061 transitions. [2021-10-16 02:08:03,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:03,809 INFO L276 IsEmpty]: Start isEmpty. Operand 21596 states and 28061 transitions. [2021-10-16 02:08:03,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-10-16 02:08:03,834 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:08:03,834 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:08:03,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:08:04,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-16 02:08:04,059 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:08:04,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:08:04,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1498107534, now seen corresponding path program 1 times [2021-10-16 02:08:04,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:08:04,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904391162] [2021-10-16 02:08:04,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:04,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:08:04,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:04,333 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 101 proven. 6 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-16 02:08:04,334 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:08:04,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904391162] [2021-10-16 02:08:04,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904391162] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:08:04,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844709383] [2021-10-16 02:08:04,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:04,335 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:08:04,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:08:04,339 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:08:04,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-16 02:08:05,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:05,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:08:05,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:08:05,631 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-10-16 02:08:05,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:08:06,292 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-10-16 02:08:06,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844709383] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:08:06,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:08:06,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2021-10-16 02:08:06,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885521929] [2021-10-16 02:08:06,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:08:06,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:08:06,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:08:06,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:08:06,295 INFO L87 Difference]: Start difference. First operand 21596 states and 28061 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:06,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:08:06,905 INFO L93 Difference]: Finished difference Result 46768 states and 61538 transitions. [2021-10-16 02:08:06,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:08:06,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 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 228 [2021-10-16 02:08:06,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:08:06,981 INFO L225 Difference]: With dead ends: 46768 [2021-10-16 02:08:06,982 INFO L226 Difference]: Without dead ends: 33753 [2021-10-16 02:08:06,994 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 453 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:08:07,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33753 states. [2021-10-16 02:08:07,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33753 to 33751. [2021-10-16 02:08:07,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33751 states, 33750 states have (on average 1.2871407407407407) internal successors, (43441), 33750 states have internal predecessors, (43441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:07,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33751 states to 33751 states and 43441 transitions. [2021-10-16 02:08:07,919 INFO L78 Accepts]: Start accepts. Automaton has 33751 states and 43441 transitions. Word has length 228 [2021-10-16 02:08:07,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:08:07,919 INFO L470 AbstractCegarLoop]: Abstraction has 33751 states and 43441 transitions. [2021-10-16 02:08:07,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:07,920 INFO L276 IsEmpty]: Start isEmpty. Operand 33751 states and 43441 transitions. [2021-10-16 02:08:07,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-10-16 02:08:07,961 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:08:07,962 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:08:08,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-10-16 02:08:08,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:08:08,187 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:08:08,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:08:08,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1649008240, now seen corresponding path program 1 times [2021-10-16 02:08:08,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:08:08,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707765973] [2021-10-16 02:08:08,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:08,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:08:08,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-16 02:08:08,448 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:08:08,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707765973] [2021-10-16 02:08:08,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707765973] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:08:08,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:08:08,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:08:08,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034285178] [2021-10-16 02:08:08,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:08:08,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:08:08,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:08:08,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:08:08,454 INFO L87 Difference]: Start difference. First operand 33751 states and 43441 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:09,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:08:09,565 INFO L93 Difference]: Finished difference Result 66216 states and 85581 transitions. [2021-10-16 02:08:09,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:08:09,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 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 228 [2021-10-16 02:08:09,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:08:09,612 INFO L225 Difference]: With dead ends: 66216 [2021-10-16 02:08:09,612 INFO L226 Difference]: Without dead ends: 41046 [2021-10-16 02:08:09,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:08:09,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41046 states. [2021-10-16 02:08:10,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41046 to 41044. [2021-10-16 02:08:10,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41044 states, 41043 states have (on average 1.2885023024632702) internal successors, (52884), 41043 states have internal predecessors, (52884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:10,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41044 states to 41044 states and 52884 transitions. [2021-10-16 02:08:10,748 INFO L78 Accepts]: Start accepts. Automaton has 41044 states and 52884 transitions. Word has length 228 [2021-10-16 02:08:10,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:08:10,749 INFO L470 AbstractCegarLoop]: Abstraction has 41044 states and 52884 transitions. [2021-10-16 02:08:10,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:10,749 INFO L276 IsEmpty]: Start isEmpty. Operand 41044 states and 52884 transitions. [2021-10-16 02:08:10,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-10-16 02:08:10,776 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:08:10,776 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:08:10,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-16 02:08:10,777 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:08:10,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:08:10,779 INFO L82 PathProgramCache]: Analyzing trace with hash -511086605, now seen corresponding path program 1 times [2021-10-16 02:08:10,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:08:10,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010517668] [2021-10-16 02:08:10,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:10,780 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:08:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-16 02:08:10,952 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:08:10,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010517668] [2021-10-16 02:08:10,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010517668] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:08:10,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:08:10,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:08:10,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295079289] [2021-10-16 02:08:10,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:08:10,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:08:10,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:08:10,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:08:10,956 INFO L87 Difference]: Start difference. First operand 41044 states and 52884 transitions. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:12,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:08:12,655 INFO L93 Difference]: Finished difference Result 79513 states and 102687 transitions. [2021-10-16 02:08:12,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:08:12,656 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 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 229 [2021-10-16 02:08:12,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:08:12,748 INFO L225 Difference]: With dead ends: 79513 [2021-10-16 02:08:12,748 INFO L226 Difference]: Without dead ends: 39185 [2021-10-16 02:08:12,774 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:08:12,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39185 states. [2021-10-16 02:08:13,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39185 to 39185. [2021-10-16 02:08:13,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39185 states, 39184 states have (on average 1.2328501429154757) internal successors, (48308), 39184 states have internal predecessors, (48308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:13,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39185 states to 39185 states and 48308 transitions. [2021-10-16 02:08:13,508 INFO L78 Accepts]: Start accepts. Automaton has 39185 states and 48308 transitions. Word has length 229 [2021-10-16 02:08:13,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:08:13,509 INFO L470 AbstractCegarLoop]: Abstraction has 39185 states and 48308 transitions. [2021-10-16 02:08:13,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:13,509 INFO L276 IsEmpty]: Start isEmpty. Operand 39185 states and 48308 transitions. [2021-10-16 02:08:13,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-10-16 02:08:13,525 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:08:13,525 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:08:13,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-16 02:08:13,526 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:08:13,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:08:13,527 INFO L82 PathProgramCache]: Analyzing trace with hash -817248172, now seen corresponding path program 1 times [2021-10-16 02:08:13,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:08:13,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864318941] [2021-10-16 02:08:13,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:13,528 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:08:13,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:13,644 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-16 02:08:13,644 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:08:13,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864318941] [2021-10-16 02:08:13,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864318941] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:08:13,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:08:13,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:08:13,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116229563] [2021-10-16 02:08:13,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:08:13,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:08:13,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:08:13,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:08:13,647 INFO L87 Difference]: Start difference. First operand 39185 states and 48308 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:14,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:08:14,930 INFO L93 Difference]: Finished difference Result 94101 states and 116068 transitions. [2021-10-16 02:08:14,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:08:14,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 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 243 [2021-10-16 02:08:14,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:08:15,004 INFO L225 Difference]: With dead ends: 94101 [2021-10-16 02:08:15,004 INFO L226 Difference]: Without dead ends: 55775 [2021-10-16 02:08:15,023 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:08:15,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55775 states. [2021-10-16 02:08:15,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55775 to 55773. [2021-10-16 02:08:16,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55773 states, 55772 states have (on average 1.2273721580721508) internal successors, (68453), 55772 states have internal predecessors, (68453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:16,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55773 states to 55773 states and 68453 transitions. [2021-10-16 02:08:16,107 INFO L78 Accepts]: Start accepts. Automaton has 55773 states and 68453 transitions. Word has length 243 [2021-10-16 02:08:16,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:08:16,107 INFO L470 AbstractCegarLoop]: Abstraction has 55773 states and 68453 transitions. [2021-10-16 02:08:16,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:16,107 INFO L276 IsEmpty]: Start isEmpty. Operand 55773 states and 68453 transitions. [2021-10-16 02:08:16,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-10-16 02:08:16,150 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:08:16,150 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:08:16,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-16 02:08:16,151 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:08:16,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:08:16,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1061541960, now seen corresponding path program 1 times [2021-10-16 02:08:16,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:08:16,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753029386] [2021-10-16 02:08:16,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:16,153 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:08:16,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:16,362 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 108 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-16 02:08:16,363 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:08:16,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753029386] [2021-10-16 02:08:16,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753029386] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:08:16,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296495710] [2021-10-16 02:08:16,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:16,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:08:16,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:08:16,366 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:08:16,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-16 02:08:17,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:17,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:08:17,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:08:17,769 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-16 02:08:17,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:08:18,434 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-16 02:08:18,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296495710] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:08:18,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:08:18,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2021-10-16 02:08:18,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417517125] [2021-10-16 02:08:18,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:08:18,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:08:18,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:08:18,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:08:18,438 INFO L87 Difference]: Start difference. First operand 55773 states and 68453 transitions. Second operand has 4 states, 4 states have (on average 96.5) internal successors, (386), 4 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:20,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:08:20,240 INFO L93 Difference]: Finished difference Result 124272 states and 155131 transitions. [2021-10-16 02:08:20,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:08:20,240 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 96.5) internal successors, (386), 4 states have internal predecessors, (386), 0 states have call successors, (0), 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 249 [2021-10-16 02:08:20,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:08:20,334 INFO L225 Difference]: With dead ends: 124272 [2021-10-16 02:08:20,334 INFO L226 Difference]: Without dead ends: 72504 [2021-10-16 02:08:20,359 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:08:20,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72504 states. [2021-10-16 02:08:21,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72504 to 69787. [2021-10-16 02:08:21,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69787 states, 69786 states have (on average 1.2490327572865618) internal successors, (87165), 69786 states have internal predecessors, (87165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:21,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69787 states to 69787 states and 87165 transitions. [2021-10-16 02:08:21,522 INFO L78 Accepts]: Start accepts. Automaton has 69787 states and 87165 transitions. Word has length 249 [2021-10-16 02:08:21,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:08:21,523 INFO L470 AbstractCegarLoop]: Abstraction has 69787 states and 87165 transitions. [2021-10-16 02:08:21,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 96.5) internal successors, (386), 4 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:21,523 INFO L276 IsEmpty]: Start isEmpty. Operand 69787 states and 87165 transitions. [2021-10-16 02:08:21,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-10-16 02:08:21,551 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:08:21,552 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:08:21,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-16 02:08:21,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-16 02:08:21,779 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:08:21,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:08:21,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1601074587, now seen corresponding path program 1 times [2021-10-16 02:08:21,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:08:21,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832848726] [2021-10-16 02:08:21,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:21,780 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:08:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:22,506 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 110 proven. 6 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-10-16 02:08:22,507 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:08:22,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832848726] [2021-10-16 02:08:22,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832848726] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:08:22,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474299908] [2021-10-16 02:08:22,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:22,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:08:22,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:08:22,509 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:08:22,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-16 02:08:23,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:23,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:08:23,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:08:23,950 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-10-16 02:08:23,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:08:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-10-16 02:08:24,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474299908] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:08:24,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:08:24,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2021-10-16 02:08:24,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801597754] [2021-10-16 02:08:24,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:08:24,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:08:24,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:08:24,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:08:24,707 INFO L87 Difference]: Start difference. First operand 69787 states and 87165 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:26,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:08:26,147 INFO L93 Difference]: Finished difference Result 152729 states and 191969 transitions. [2021-10-16 02:08:26,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:08:26,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 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 265 [2021-10-16 02:08:26,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:08:26,261 INFO L225 Difference]: With dead ends: 152729 [2021-10-16 02:08:26,261 INFO L226 Difference]: Without dead ends: 83801 [2021-10-16 02:08:26,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 527 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:08:26,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83801 states. [2021-10-16 02:08:27,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83801 to 75793. [2021-10-16 02:08:27,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75793 states, 75792 states have (on average 1.2395107663077898) internal successors, (93945), 75792 states have internal predecessors, (93945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:27,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75793 states to 75793 states and 93945 transitions. [2021-10-16 02:08:27,701 INFO L78 Accepts]: Start accepts. Automaton has 75793 states and 93945 transitions. Word has length 265 [2021-10-16 02:08:27,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:08:27,702 INFO L470 AbstractCegarLoop]: Abstraction has 75793 states and 93945 transitions. [2021-10-16 02:08:27,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:27,702 INFO L276 IsEmpty]: Start isEmpty. Operand 75793 states and 93945 transitions. [2021-10-16 02:08:27,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-10-16 02:08:27,739 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:08:27,740 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:08:27,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-16 02:08:27,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-16 02:08:27,941 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:08:27,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:08:27,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1722522458, now seen corresponding path program 1 times [2021-10-16 02:08:27,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:08:27,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471814462] [2021-10-16 02:08:27,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:27,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:08:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 147 proven. 6 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2021-10-16 02:08:28,233 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:08:28,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471814462] [2021-10-16 02:08:28,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471814462] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:08:28,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930935124] [2021-10-16 02:08:28,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:28,234 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:08:28,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:08:28,236 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:08:28,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-16 02:08:29,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:29,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:08:29,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:08:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 272 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-16 02:08:29,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:08:30,396 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 272 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-16 02:08:30,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930935124] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:08:30,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:08:30,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 7 [2021-10-16 02:08:30,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769443041] [2021-10-16 02:08:30,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:08:30,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:08:30,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:08:30,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:08:30,399 INFO L87 Difference]: Start difference. First operand 75793 states and 93945 transitions. Second operand has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:32,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:08:32,146 INFO L93 Difference]: Finished difference Result 140574 states and 175352 transitions. [2021-10-16 02:08:32,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:08:32,147 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 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 306 [2021-10-16 02:08:32,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:08:32,221 INFO L225 Difference]: With dead ends: 140574 [2021-10-16 02:08:32,221 INFO L226 Difference]: Without dead ends: 61064 [2021-10-16 02:08:32,255 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 609 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:08:32,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61064 states. [2021-10-16 02:08:33,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61064 to 51483. [2021-10-16 02:08:33,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51483 states, 51482 states have (on average 1.1461287440270387) internal successors, (59005), 51482 states have internal predecessors, (59005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:33,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51483 states to 51483 states and 59005 transitions. [2021-10-16 02:08:33,318 INFO L78 Accepts]: Start accepts. Automaton has 51483 states and 59005 transitions. Word has length 306 [2021-10-16 02:08:33,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:08:33,318 INFO L470 AbstractCegarLoop]: Abstraction has 51483 states and 59005 transitions. [2021-10-16 02:08:33,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:33,319 INFO L276 IsEmpty]: Start isEmpty. Operand 51483 states and 59005 transitions. [2021-10-16 02:08:33,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-10-16 02:08:33,338 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:08:33,338 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:08:33,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-16 02:08:33,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-16 02:08:33,541 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:08:33,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:08:33,542 INFO L82 PathProgramCache]: Analyzing trace with hash -142547820, now seen corresponding path program 1 times [2021-10-16 02:08:33,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:08:33,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507277455] [2021-10-16 02:08:33,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:33,543 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:08:33,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:33,724 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-10-16 02:08:33,724 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:08:33,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507277455] [2021-10-16 02:08:33,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507277455] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:08:33,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:08:33,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:08:33,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52021501] [2021-10-16 02:08:33,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:08:33,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:08:33,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:08:33,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:08:33,728 INFO L87 Difference]: Start difference. First operand 51483 states and 59005 transitions. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 2 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:35,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:08:35,118 INFO L93 Difference]: Finished difference Result 118123 states and 135438 transitions. [2021-10-16 02:08:35,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:08:35,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 2 states have internal predecessors, (260), 0 states have call successors, (0), 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 322 [2021-10-16 02:08:35,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:08:35,218 INFO L225 Difference]: With dead ends: 118123 [2021-10-16 02:08:35,219 INFO L226 Difference]: Without dead ends: 68643 [2021-10-16 02:08:35,248 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:08:35,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68643 states. [2021-10-16 02:08:36,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68643 to 67070. [2021-10-16 02:08:36,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67070 states, 67069 states have (on average 1.1460287166947472) internal successors, (76863), 67069 states have internal predecessors, (76863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:36,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67070 states to 67070 states and 76863 transitions. [2021-10-16 02:08:36,643 INFO L78 Accepts]: Start accepts. Automaton has 67070 states and 76863 transitions. Word has length 322 [2021-10-16 02:08:36,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:08:36,643 INFO L470 AbstractCegarLoop]: Abstraction has 67070 states and 76863 transitions. [2021-10-16 02:08:36,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 2 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:36,644 INFO L276 IsEmpty]: Start isEmpty. Operand 67070 states and 76863 transitions. [2021-10-16 02:08:36,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2021-10-16 02:08:36,673 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:08:36,673 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:08:36,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-16 02:08:36,674 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:08:36,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:08:36,674 INFO L82 PathProgramCache]: Analyzing trace with hash 848149713, now seen corresponding path program 1 times [2021-10-16 02:08:36,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:08:36,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203821588] [2021-10-16 02:08:36,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:36,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:08:36,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:37,000 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 197 proven. 6 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-10-16 02:08:37,001 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:08:37,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203821588] [2021-10-16 02:08:37,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203821588] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:08:37,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153932156] [2021-10-16 02:08:37,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:37,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:08:37,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:08:37,007 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:08:37,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-16 02:08:38,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:38,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:08:38,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:08:38,803 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 261 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-16 02:08:38,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:08:39,487 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 261 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-16 02:08:39,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153932156] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:08:39,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:08:39,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2021-10-16 02:08:39,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610086396] [2021-10-16 02:08:39,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:08:39,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:08:39,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:08:39,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:08:39,491 INFO L87 Difference]: Start difference. First operand 67070 states and 76863 transitions. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:40,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:08:40,772 INFO L93 Difference]: Finished difference Result 123128 states and 141273 transitions. [2021-10-16 02:08:40,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:08:40,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 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 329 [2021-10-16 02:08:40,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:08:40,842 INFO L225 Difference]: With dead ends: 123128 [2021-10-16 02:08:40,842 INFO L226 Difference]: Without dead ends: 57060 [2021-10-16 02:08:40,869 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 656 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:08:40,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57060 states. [2021-10-16 02:08:41,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57060 to 56059. [2021-10-16 02:08:41,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56059 states, 56058 states have (on average 1.1440293981233722) internal successors, (64132), 56058 states have internal predecessors, (64132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:41,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56059 states to 56059 states and 64132 transitions. [2021-10-16 02:08:41,978 INFO L78 Accepts]: Start accepts. Automaton has 56059 states and 64132 transitions. Word has length 329 [2021-10-16 02:08:41,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:08:41,978 INFO L470 AbstractCegarLoop]: Abstraction has 56059 states and 64132 transitions. [2021-10-16 02:08:41,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:41,979 INFO L276 IsEmpty]: Start isEmpty. Operand 56059 states and 64132 transitions. [2021-10-16 02:08:42,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2021-10-16 02:08:42,033 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:08:42,033 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:08:42,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:08:42,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-10-16 02:08:42,247 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:08:42,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:08:42,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1273903771, now seen corresponding path program 1 times [2021-10-16 02:08:42,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:08:42,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457317830] [2021-10-16 02:08:42,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:42,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:08:42,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:42,574 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 184 proven. 6 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2021-10-16 02:08:42,574 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:08:42,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457317830] [2021-10-16 02:08:42,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457317830] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:08:42,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366541379] [2021-10-16 02:08:42,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:42,575 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:08:42,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:08:42,576 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:08:42,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-16 02:08:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:43,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:08:43,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:08:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 480 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-10-16 02:08:45,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:08:46,248 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 480 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-10-16 02:08:46,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366541379] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:08:46,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:08:46,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 7 [2021-10-16 02:08:46,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122824284] [2021-10-16 02:08:46,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:08:46,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:08:46,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:08:46,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:08:46,255 INFO L87 Difference]: Start difference. First operand 56059 states and 64132 transitions. Second operand has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:48,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:08:48,043 INFO L93 Difference]: Finished difference Result 130850 states and 149798 transitions. [2021-10-16 02:08:48,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:08:48,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 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 423 [2021-10-16 02:08:48,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:08:48,142 INFO L225 Difference]: With dead ends: 130850 [2021-10-16 02:08:48,142 INFO L226 Difference]: Without dead ends: 76222 [2021-10-16 02:08:48,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 848 GetRequests, 843 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:08:48,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76222 states. [2021-10-16 02:08:49,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76222 to 61779. [2021-10-16 02:08:49,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61779 states, 61778 states have (on average 1.1477224902068697) internal successors, (70904), 61778 states have internal predecessors, (70904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:49,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61779 states to 61779 states and 70904 transitions. [2021-10-16 02:08:49,504 INFO L78 Accepts]: Start accepts. Automaton has 61779 states and 70904 transitions. Word has length 423 [2021-10-16 02:08:49,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:08:49,504 INFO L470 AbstractCegarLoop]: Abstraction has 61779 states and 70904 transitions. [2021-10-16 02:08:49,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:49,505 INFO L276 IsEmpty]: Start isEmpty. Operand 61779 states and 70904 transitions. [2021-10-16 02:08:49,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2021-10-16 02:08:49,559 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:08:49,560 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:08:49,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:08:49,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:08:49,762 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:08:49,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:08:49,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1501468440, now seen corresponding path program 1 times [2021-10-16 02:08:49,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:08:49,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566898582] [2021-10-16 02:08:49,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:49,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:08:49,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:50,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 257 proven. 6 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-10-16 02:08:50,081 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:08:50,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566898582] [2021-10-16 02:08:50,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566898582] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:08:50,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458276203] [2021-10-16 02:08:50,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:50,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:08:50,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:08:50,087 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:08:50,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-16 02:08:51,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:51,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:08:51,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:08:52,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 708 proven. 0 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2021-10-16 02:08:52,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:08:54,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 708 proven. 0 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2021-10-16 02:08:54,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458276203] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:08:54,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:08:54,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2021-10-16 02:08:54,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777367539] [2021-10-16 02:08:54,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:08:54,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:08:54,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:08:54,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:08:54,238 INFO L87 Difference]: Start difference. First operand 61779 states and 70904 transitions. Second operand has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:55,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:08:55,215 INFO L93 Difference]: Finished difference Result 147295 states and 169766 transitions. [2021-10-16 02:08:55,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:08:55,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 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 527 [2021-10-16 02:08:55,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:08:55,321 INFO L225 Difference]: With dead ends: 147295 [2021-10-16 02:08:55,322 INFO L226 Difference]: Without dead ends: 86089 [2021-10-16 02:08:55,352 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1056 GetRequests, 1051 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:08:55,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86089 states. [2021-10-16 02:08:56,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86089 to 81942. [2021-10-16 02:08:56,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81942 states, 81941 states have (on average 1.142590400410051) internal successors, (93625), 81941 states have internal predecessors, (93625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:56,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81942 states to 81942 states and 93625 transitions. [2021-10-16 02:08:56,738 INFO L78 Accepts]: Start accepts. Automaton has 81942 states and 93625 transitions. Word has length 527 [2021-10-16 02:08:56,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:08:56,739 INFO L470 AbstractCegarLoop]: Abstraction has 81942 states and 93625 transitions. [2021-10-16 02:08:56,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:08:56,739 INFO L276 IsEmpty]: Start isEmpty. Operand 81942 states and 93625 transitions. [2021-10-16 02:08:56,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2021-10-16 02:08:56,814 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:08:56,814 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-16 02:08:56,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-10-16 02:08:57,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:08:57,031 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:08:57,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:08:57,032 INFO L82 PathProgramCache]: Analyzing trace with hash 275814175, now seen corresponding path program 1 times [2021-10-16 02:08:57,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:08:57,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269577125] [2021-10-16 02:08:57,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:57,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:08:57,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:57,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1052 backedges. 221 proven. 6 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2021-10-16 02:08:57,898 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:08:57,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269577125] [2021-10-16 02:08:57,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269577125] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:08:57,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868329138] [2021-10-16 02:08:57,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:08:57,900 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:08:57,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:08:57,915 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:08:57,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-16 02:08:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:08:59,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 952 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:08:59,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:09:02,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1052 backedges. 824 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-10-16 02:09:02,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:09:04,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1052 backedges. 824 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-10-16 02:09:04,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868329138] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:09:04,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:09:04,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 7 [2021-10-16 02:09:04,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996346726] [2021-10-16 02:09:04,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:09:04,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:09:04,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:09:04,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:09:04,640 INFO L87 Difference]: Start difference. First operand 81942 states and 93625 transitions. Second operand has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:09:06,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:09:06,219 INFO L93 Difference]: Finished difference Result 176322 states and 201063 transitions. [2021-10-16 02:09:06,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:09:06,219 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 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 552 [2021-10-16 02:09:06,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:09:06,220 INFO L225 Difference]: With dead ends: 176322 [2021-10-16 02:09:06,220 INFO L226 Difference]: Without dead ends: 0 [2021-10-16 02:09:06,263 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1106 GetRequests, 1101 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 114.5ms TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:09:06,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-16 02:09:06,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-16 02:09:06,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:09:06,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-16 02:09:06,264 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 552 [2021-10-16 02:09:06,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:09:06,264 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-16 02:09:06,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:09:06,264 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-16 02:09:06,264 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-16 02:09:06,267 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:09:06,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-10-16 02:09:06,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:09:06,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-16 02:09:06,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:09:06,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:09:11,768 WARN L207 SmtUtils]: Spent 5.26 s on a formula simplification. DAG size of input: 1442 DAG size of output: 239 [2021-10-16 02:09:11,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:09:17,401 INFO L857 garLoopResultBuilder]: For program point L498(lines 498 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,401 INFO L857 garLoopResultBuilder]: For program point L432(lines 432 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,401 INFO L857 garLoopResultBuilder]: For program point L366(lines 366 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,401 INFO L857 garLoopResultBuilder]: For program point L763(lines 763 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,402 INFO L857 garLoopResultBuilder]: For program point L632(lines 632 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,402 INFO L857 garLoopResultBuilder]: For program point L566(lines 566 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,402 INFO L857 garLoopResultBuilder]: For program point L302(lines 302 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,402 INFO L857 garLoopResultBuilder]: For program point L1293(lines 1293 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,402 INFO L857 garLoopResultBuilder]: For program point L1360(lines 1360 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,402 INFO L857 garLoopResultBuilder]: For program point L1162(lines 1162 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,402 INFO L857 garLoopResultBuilder]: For program point L105(lines 105 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,402 INFO L857 garLoopResultBuilder]: For program point L1096(lines 1096 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,403 INFO L857 garLoopResultBuilder]: For program point L1031(lines 1031 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,403 INFO L857 garLoopResultBuilder]: For program point L965(lines 965 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,403 INFO L857 garLoopResultBuilder]: For program point L899(lines 899 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,403 INFO L857 garLoopResultBuilder]: For program point L174(lines 174 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,403 INFO L857 garLoopResultBuilder]: For program point L835(lines 835 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,403 INFO L857 garLoopResultBuilder]: For program point L771(lines 771 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,404 INFO L857 garLoopResultBuilder]: For program point L507(lines 507 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,404 INFO L857 garLoopResultBuilder]: For program point L243(lines 243 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,404 INFO L857 garLoopResultBuilder]: For program point L1433(lines 1433 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,404 INFO L857 garLoopResultBuilder]: For program point L376(lines 376 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,404 INFO L857 garLoopResultBuilder]: For program point L311(lines 311 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,404 INFO L857 garLoopResultBuilder]: For program point L1236(lines 1236 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,405 INFO L857 garLoopResultBuilder]: For program point L576(lines 576 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,405 INFO L857 garLoopResultBuilder]: For program point L444(lines 444 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,405 INFO L857 garLoopResultBuilder]: For program point L1369(lines 1369 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,405 INFO L857 garLoopResultBuilder]: For program point L1105(lines 1105 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,405 INFO L857 garLoopResultBuilder]: For program point L643(lines 643 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,405 INFO L857 garLoopResultBuilder]: For program point L1172(lines 1172 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,406 INFO L857 garLoopResultBuilder]: For program point L115(lines 115 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,406 INFO L857 garLoopResultBuilder]: For program point L248(lines 248 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,406 INFO L857 garLoopResultBuilder]: For program point L182(lines 182 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,406 INFO L857 garLoopResultBuilder]: For program point L1041(lines 1041 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,406 INFO L857 garLoopResultBuilder]: For program point L909(lines 909 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,406 INFO L857 garLoopResultBuilder]: For program point L711(lines 711 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,406 INFO L857 garLoopResultBuilder]: For program point L976(lines 976 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,407 INFO L857 garLoopResultBuilder]: For program point L779(lines 779 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,407 INFO L857 garLoopResultBuilder]: For program point L846(lines 846 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,407 INFO L857 garLoopResultBuilder]: For program point L451(lines 451 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,407 INFO L857 garLoopResultBuilder]: For program point L1442(lines 1442 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,407 INFO L857 garLoopResultBuilder]: For program point L584(lines 584 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,407 INFO L857 garLoopResultBuilder]: For program point L387(lines 387 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,408 INFO L857 garLoopResultBuilder]: For program point L1114(lines 1114 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,408 INFO L857 garLoopResultBuilder]: For program point L1048(lines 1048 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,408 INFO L857 garLoopResultBuilder]: For program point L322(lines 322 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,408 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-16 02:09:17,408 INFO L857 garLoopResultBuilder]: For program point L1247(lines 1247 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,408 INFO L857 garLoopResultBuilder]: For program point L124(lines 124 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,409 INFO L857 garLoopResultBuilder]: For program point L917(lines 917 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,409 INFO L857 garLoopResultBuilder]: For program point L719(lines 719 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,409 INFO L857 garLoopResultBuilder]: For program point L653(lines 653 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,409 INFO L857 garLoopResultBuilder]: For program point L191(lines 191 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,409 INFO L857 garLoopResultBuilder]: For program point L1315(lines 1315 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,409 INFO L857 garLoopResultBuilder]: For program point L258(lines 258 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,410 INFO L857 garLoopResultBuilder]: For program point L1183(lines 1183 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,410 INFO L857 garLoopResultBuilder]: For program point L985(lines 985 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,410 INFO L857 garLoopResultBuilder]: For program point L787(lines 787 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,410 INFO L857 garLoopResultBuilder]: For program point L523(lines 523 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,410 INFO L857 garLoopResultBuilder]: For program point L854(lines 854 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,410 INFO L857 garLoopResultBuilder]: For program point L460(lines 460 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,410 INFO L857 garLoopResultBuilder]: For program point L593(lines 593 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,411 INFO L857 garLoopResultBuilder]: For program point L1452(lines 1452 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,411 INFO L857 garLoopResultBuilder]: For program point L329(lines 329 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,411 INFO L857 garLoopResultBuilder]: For program point L1122(lines 1122 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,411 INFO L857 garLoopResultBuilder]: For program point L65(lines 65 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,411 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 1540) no Hoare annotation was computed. [2021-10-16 02:09:17,411 INFO L857 garLoopResultBuilder]: For program point L794(lines 794 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,412 INFO L857 garLoopResultBuilder]: For program point L1323(lines 1323 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,412 INFO L857 garLoopResultBuilder]: For program point L993(lines 993 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,412 INFO L857 garLoopResultBuilder]: For program point L927(lines 927 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,412 INFO L857 garLoopResultBuilder]: For program point L663(lines 663 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,412 INFO L857 garLoopResultBuilder]: For program point L267(lines 267 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,412 INFO L857 garLoopResultBuilder]: For program point L201(lines 201 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,413 INFO L857 garLoopResultBuilder]: For program point L1192(lines 1192 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,413 INFO L857 garLoopResultBuilder]: For program point L532(lines 532 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,413 INFO L857 garLoopResultBuilder]: For program point L1391(lines 1391 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,413 INFO L857 garLoopResultBuilder]: For program point L1259(lines 1259 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,413 INFO L857 garLoopResultBuilder]: For program point L136(lines 136 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,413 INFO L857 garLoopResultBuilder]: For program point L863(lines 863 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,414 INFO L857 garLoopResultBuilder]: For program point L468(lines 468 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,414 INFO L857 garLoopResultBuilder]: For program point L1130(lines 1130 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,414 INFO L857 garLoopResultBuilder]: For program point L668(lines 668 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,414 INFO L853 garLoopResultBuilder]: At program point L1659(lines 64 1660) the Hoare annotation is: (let ((.cse7 (= ~a26~0 1)) (.cse8 (= ~a12~0 1))) (let ((.cse1 (< 0 ~a3~0)) (.cse2 (<= ~a27~0 0)) (.cse4 (= ~a11~0 ~a6~0)) (.cse3 (or (and .cse7 (= ~a12~0 0)) (and (= ~a26~0 0) .cse8))) (.cse10 (<= ~a11~0 0)) (.cse6 (= ~a27~0 1)) (.cse9 (<= ~a6~0 0)) (.cse0 (= ~a5~0 1)) (.cse5 (<= ~a12~0 0))) (or (and .cse0 (<= 2 ~a3~0)) (and .cse0 .cse1 .cse2) (and .cse0 .cse3 .cse2) (and .cse0 .cse4 .cse5 .cse6) (and .cse7 .cse0 .cse8 (<= ~a3~0 0)) (and .cse0 .cse5 .cse6 .cse9) (and .cse7 .cse0 .cse6) (and .cse0 .cse1 .cse6) (and .cse0 .cse10 .cse5 .cse6) (and (= ~a15~0 1) .cse0 .cse8 .cse4 .cse6 (= ~a12~0 ~a6~0)) (and .cse7 .cse0 .cse10 .cse2) (and .cse0 .cse4 .cse3) (and .cse0 .cse10 .cse6 .cse9) (and .cse7 .cse0 .cse5)))) [2021-10-16 02:09:17,415 INFO L857 garLoopResultBuilder]: For program point L602(lines 602 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,415 INFO L857 garLoopResultBuilder]: For program point L1462(lines 1462 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,415 INFO L857 garLoopResultBuilder]: For program point L339(lines 339 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,415 INFO L857 garLoopResultBuilder]: For program point L1331(lines 1331 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,415 INFO L860 garLoopResultBuilder]: At program point L1662(lines 1662 1679) the Hoare annotation is: true [2021-10-16 02:09:17,415 INFO L857 garLoopResultBuilder]: For program point L539(lines 539 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,416 INFO L857 garLoopResultBuilder]: For program point L407(lines 407 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,416 INFO L857 garLoopResultBuilder]: For program point L275(lines 275 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,416 INFO L857 garLoopResultBuilder]: For program point L1200(lines 1200 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,416 INFO L857 garLoopResultBuilder]: For program point L805(lines 805 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,416 INFO L857 garLoopResultBuilder]: For program point L145(lines 145 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,416 INFO L857 garLoopResultBuilder]: For program point L1004(lines 1004 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,417 INFO L857 garLoopResultBuilder]: For program point L1137(lines 1137 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,417 INFO L857 garLoopResultBuilder]: For program point L1071(lines 1071 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,417 INFO L857 garLoopResultBuilder]: For program point L873(lines 873 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,417 INFO L857 garLoopResultBuilder]: For program point L675(lines 675 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,417 INFO L857 garLoopResultBuilder]: For program point L477(lines 477 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,417 INFO L857 garLoopResultBuilder]: For program point L1336(lines 1336 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,417 INFO L857 garLoopResultBuilder]: For program point L743(lines 743 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,418 INFO L853 garLoopResultBuilder]: At program point L1668-2(lines 1668 1678) the Hoare annotation is: (let ((.cse7 (= ~a26~0 1)) (.cse8 (= ~a12~0 1))) (let ((.cse1 (< 0 ~a3~0)) (.cse2 (<= ~a27~0 0)) (.cse4 (= ~a11~0 ~a6~0)) (.cse3 (or (and .cse7 (= ~a12~0 0)) (and (= ~a26~0 0) .cse8))) (.cse10 (<= ~a11~0 0)) (.cse6 (= ~a27~0 1)) (.cse9 (<= ~a6~0 0)) (.cse0 (= ~a5~0 1)) (.cse5 (<= ~a12~0 0))) (or (and .cse0 (<= 2 ~a3~0)) (and .cse0 .cse1 .cse2) (and .cse0 .cse3 .cse2) (and .cse0 .cse4 .cse5 .cse6) (and .cse7 .cse0 .cse8 (<= ~a3~0 0)) (and .cse0 .cse5 .cse6 .cse9) (and .cse7 .cse0 .cse6) (and .cse0 .cse1 .cse6) (and .cse0 .cse10 .cse5 .cse6) (and (= ~a15~0 1) .cse0 .cse8 .cse4 .cse6 (= ~a12~0 ~a6~0)) (and .cse7 .cse0 .cse10 .cse2) (and .cse0 .cse4 .cse3) (and .cse0 .cse10 .cse6 .cse9) (and .cse7 .cse0 .cse5)))) [2021-10-16 02:09:17,418 INFO L857 garLoopResultBuilder]: For program point L1536-1(lines 64 1660) no Hoare annotation was computed. [2021-10-16 02:09:17,418 INFO L857 garLoopResultBuilder]: For program point L1470(lines 1470 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,418 INFO L857 garLoopResultBuilder]: For program point L83(lines 83 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,418 INFO L857 garLoopResultBuilder]: For program point L613(lines 613 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,419 INFO L857 garLoopResultBuilder]: For program point L415(lines 415 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,419 INFO L857 garLoopResultBuilder]: For program point L349(lines 349 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,419 INFO L857 garLoopResultBuilder]: For program point L1142(lines 1142 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,419 INFO L857 garLoopResultBuilder]: For program point L1076(lines 1076 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,419 INFO L857 garLoopResultBuilder]: For program point L878(lines 878 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,419 INFO L857 garLoopResultBuilder]: For program point L1539-1(lines 64 1660) no Hoare annotation was computed. [2021-10-16 02:09:17,420 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-16 02:09:17,420 INFO L857 garLoopResultBuilder]: For program point L549(lines 549 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,420 INFO L857 garLoopResultBuilder]: For program point L1540(line 1540) no Hoare annotation was computed. [2021-10-16 02:09:17,420 INFO L857 garLoopResultBuilder]: For program point L1210(lines 1210 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,420 INFO L857 garLoopResultBuilder]: For program point L814(lines 814 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,420 INFO L857 garLoopResultBuilder]: For program point L1673(line 1673) no Hoare annotation was computed. [2021-10-16 02:09:17,420 INFO L857 garLoopResultBuilder]: For program point L286(lines 286 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,421 INFO L857 garLoopResultBuilder]: For program point L1013(lines 1013 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,421 INFO L857 garLoopResultBuilder]: For program point L947(lines 947 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,421 INFO L857 garLoopResultBuilder]: For program point L156(lines 156 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,421 INFO L857 garLoopResultBuilder]: For program point L685(lines 685 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,421 INFO L857 garLoopResultBuilder]: For program point L1412(lines 1412 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,421 INFO L857 garLoopResultBuilder]: For program point L1346(lines 1346 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,422 INFO L857 garLoopResultBuilder]: For program point L223(lines 223 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,422 INFO L857 garLoopResultBuilder]: For program point L92(lines 92 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,422 INFO L857 garLoopResultBuilder]: For program point L753(lines 753 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,422 INFO L857 garLoopResultBuilder]: For program point L1084(lines 1084 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,422 INFO L857 garLoopResultBuilder]: For program point L556(lines 556 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,422 INFO L857 garLoopResultBuilder]: For program point L490(lines 490 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,423 INFO L857 garLoopResultBuilder]: For program point L424(lines 424 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,423 INFO L857 garLoopResultBuilder]: For program point L358(lines 358 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,423 INFO L857 garLoopResultBuilder]: For program point L1284(lines 1284 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,423 INFO L857 garLoopResultBuilder]: For program point L1152(lines 1152 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,423 INFO L857 garLoopResultBuilder]: For program point L624(lines 624 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,423 INFO L857 garLoopResultBuilder]: For program point L294(lines 294 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,424 INFO L857 garLoopResultBuilder]: For program point L1021(lines 1021 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,424 INFO L857 garLoopResultBuilder]: For program point L823(lines 823 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,424 INFO L857 garLoopResultBuilder]: For program point L1220(lines 1220 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,424 INFO L857 garLoopResultBuilder]: For program point L957(lines 957 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,424 INFO L857 garLoopResultBuilder]: For program point L1354(lines 1354 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,424 INFO L857 garLoopResultBuilder]: For program point L165(lines 165 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,425 INFO L857 garLoopResultBuilder]: For program point L99(lines 99 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,425 INFO L857 garLoopResultBuilder]: For program point L694(lines 694 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,425 INFO L857 garLoopResultBuilder]: For program point L232(lines 232 1475) no Hoare annotation was computed. [2021-10-16 02:09:17,430 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:09:17,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:09:17 BoogieIcfgContainer [2021-10-16 02:09:17,455 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:09:17,456 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:09:17,456 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:09:17,456 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:09:17,457 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:07:42" (3/4) ... [2021-10-16 02:09:17,460 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-16 02:09:17,504 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 123 nodes and edges [2021-10-16 02:09:17,510 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2021-10-16 02:09:17,514 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-16 02:09:17,519 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-16 02:09:17,783 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:09:17,784 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:09:17,785 INFO L168 Benchmark]: Toolchain (without parser) took 100729.47 ms. Allocated memory was 130.0 MB in the beginning and 13.0 GB in the end (delta: 12.8 GB). Free memory was 96.2 MB in the beginning and 10.5 GB in the end (delta: -10.4 GB). Peak memory consumption was 2.5 GB. Max. memory is 16.1 GB. [2021-10-16 02:09:17,786 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 88.1 MB. Free memory is still 43.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:09:17,787 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1443.38 ms. Allocated memory is still 130.0 MB. Free memory was 95.8 MB in the beginning and 54.8 MB in the end (delta: 41.0 MB). Peak memory consumption was 39.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:09:17,787 INFO L168 Benchmark]: Boogie Procedure Inliner took 216.62 ms. Allocated memory is still 130.0 MB. Free memory was 54.8 MB in the beginning and 91.4 MB in the end (delta: -36.6 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:09:17,788 INFO L168 Benchmark]: Boogie Preprocessor took 135.76 ms. Allocated memory is still 130.0 MB. Free memory was 91.4 MB in the beginning and 80.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:09:17,789 INFO L168 Benchmark]: RCFGBuilder took 3473.52 ms. Allocated memory was 130.0 MB in the beginning and 188.7 MB in the end (delta: 58.7 MB). Free memory was 80.9 MB in the beginning and 85.5 MB in the end (delta: -4.6 MB). Peak memory consumption was 64.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:09:17,789 INFO L168 Benchmark]: TraceAbstraction took 95121.57 ms. Allocated memory was 188.7 MB in the beginning and 13.0 GB in the end (delta: 12.8 GB). Free memory was 85.5 MB in the beginning and 10.5 GB in the end (delta: -10.4 GB). Peak memory consumption was 3.0 GB. Max. memory is 16.1 GB. [2021-10-16 02:09:17,791 INFO L168 Benchmark]: Witness Printer took 328.03 ms. Allocated memory is still 13.0 GB. Free memory was 10.5 GB in the beginning and 10.5 GB in the end (delta: 36.7 MB). Peak memory consumption was 35.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:09:17,794 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 88.1 MB. Free memory is still 43.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1443.38 ms. Allocated memory is still 130.0 MB. Free memory was 95.8 MB in the beginning and 54.8 MB in the end (delta: 41.0 MB). Peak memory consumption was 39.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 216.62 ms. Allocated memory is still 130.0 MB. Free memory was 54.8 MB in the beginning and 91.4 MB in the end (delta: -36.6 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 135.76 ms. Allocated memory is still 130.0 MB. Free memory was 91.4 MB in the beginning and 80.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * RCFGBuilder took 3473.52 ms. Allocated memory was 130.0 MB in the beginning and 188.7 MB in the end (delta: 58.7 MB). Free memory was 80.9 MB in the beginning and 85.5 MB in the end (delta: -4.6 MB). Peak memory consumption was 64.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 95121.57 ms. Allocated memory was 188.7 MB in the beginning and 13.0 GB in the end (delta: 12.8 GB). Free memory was 85.5 MB in the beginning and 10.5 GB in the end (delta: -10.4 GB). Peak memory consumption was 3.0 GB. Max. memory is 16.1 GB. * Witness Printer took 328.03 ms. Allocated memory is still 13.0 GB. Free memory was 10.5 GB in the beginning and 10.5 GB in the end (delta: 36.7 MB). Peak memory consumption was 35.7 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, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 1540]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 148 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 95008.2ms, OverallIterations: 23, TraceHistogramMax: 9, EmptinessCheckTime: 678.9ms, AutomataDifference: 30651.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 10913.2ms, InitialAbstractionConstructionTime: 21.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3029 SDtfs, 3139 SDslu, 279 SDs, 0 SdLazy, 12836 SolverSat, 2115 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16059.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6554 GetRequests, 6492 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 676.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=81942occurred in iteration=22, InterpolantAutomatonStates: 75, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 15676.7ms AutomataMinimizationTime, 23 MinimizatonAttempts, 43770 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 1403 NumberOfFragments, 379 HoareAnnotationTreeSize, 3 FomulaSimplifications, 121036 FormulaSimplificationTreeSizeReduction, 8563.8ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 7396 FormulaSimplificationTreeSizeReductionInter, 2333.7ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 1084.2ms SsaConstructionTime, 2373.7ms SatisfiabilityAnalysisTime, 23561.2ms InterpolantComputationTime, 9114 NumberOfCodeBlocks, 9114 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 12324 ConstructedInterpolants, 0 QuantifiedInterpolants, 32684 SizeOfPredicates, 24 NumberOfNonLiveVariables, 6579 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 43 InterpolantComputations, 33 PerfectInterpolantSequences, 13662/13716 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 1662]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 64]: Loop Invariant Derived loop invariant: (((((((((((((a5 == 1 && 2 <= a3) || ((a5 == 1 && 0 < a3) && a27 <= 0)) || ((a5 == 1 && ((a26 == 1 && a12 == 0) || (a26 == 0 && a12 == 1))) && a27 <= 0)) || (((a5 == 1 && a11 == a6) && a12 <= 0) && a27 == 1)) || (((a26 == 1 && a5 == 1) && a12 == 1) && a3 <= 0)) || (((a5 == 1 && a12 <= 0) && a27 == 1) && a6 <= 0)) || ((a26 == 1 && a5 == 1) && a27 == 1)) || ((a5 == 1 && 0 < a3) && a27 == 1)) || (((a5 == 1 && a11 <= 0) && a12 <= 0) && a27 == 1)) || (((((a15 == 1 && a5 == 1) && a12 == 1) && a11 == a6) && a27 == 1) && a12 == a6)) || (((a26 == 1 && a5 == 1) && a11 <= 0) && a27 <= 0)) || ((a5 == 1 && a11 == a6) && ((a26 == 1 && a12 == 0) || (a26 == 0 && a12 == 1)))) || (((a5 == 1 && a11 <= 0) && a27 == 1) && a6 <= 0)) || ((a26 == 1 && a5 == 1) && a12 <= 0) - InvariantResult [Line: 1668]: Loop Invariant Derived loop invariant: (((((((((((((a5 == 1 && 2 <= a3) || ((a5 == 1 && 0 < a3) && a27 <= 0)) || ((a5 == 1 && ((a26 == 1 && a12 == 0) || (a26 == 0 && a12 == 1))) && a27 <= 0)) || (((a5 == 1 && a11 == a6) && a12 <= 0) && a27 == 1)) || (((a26 == 1 && a5 == 1) && a12 == 1) && a3 <= 0)) || (((a5 == 1 && a12 <= 0) && a27 == 1) && a6 <= 0)) || ((a26 == 1 && a5 == 1) && a27 == 1)) || ((a5 == 1 && 0 < a3) && a27 == 1)) || (((a5 == 1 && a11 <= 0) && a12 <= 0) && a27 == 1)) || (((((a15 == 1 && a5 == 1) && a12 == 1) && a11 == a6) && a27 == 1) && a12 == a6)) || (((a26 == 1 && a5 == 1) && a11 <= 0) && a27 <= 0)) || ((a5 == 1 && a11 == a6) && ((a26 == 1 && a12 == 0) || (a26 == 0 && a12 == 1)))) || (((a5 == 1 && a11 <= 0) && a27 == 1) && a6 <= 0)) || ((a26 == 1 && a5 == 1) && a12 <= 0) RESULT: Ultimate proved your program to be correct! [2021-10-16 02:09:17,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6452912-08d3-4625-b79d-4e92e6b9f69d/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...