./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem04_label12.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b70e7a-569b-4b73-90a0-9ff8cd5da899/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b70e7a-569b-4b73-90a0-9ff8cd5da899/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b70e7a-569b-4b73-90a0-9ff8cd5da899/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b70e7a-569b-4b73-90a0-9ff8cd5da899/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem04_label12.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b70e7a-569b-4b73-90a0-9ff8cd5da899/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b70e7a-569b-4b73-90a0-9ff8cd5da899/bin/utaipan-vmNK8stdcF --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 03d8c36b2b461f2e971b6e7a5a6a75d5c3ec3fc4aa27ca1a57d652ec13d33c8f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:07:45,283 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:07:45,285 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:07:45,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:07:45,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:07:45,346 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:07:45,348 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:07:45,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:07:45,354 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:07:45,360 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:07:45,361 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:07:45,363 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:07:45,364 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:07:45,366 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:07:45,368 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:07:45,372 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:07:45,374 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:07:45,375 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:07:45,378 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:07:45,384 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:07:45,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:07:45,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:07:45,389 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:07:45,390 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:07:45,393 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:07:45,394 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:07:45,394 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:07:45,395 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:07:45,396 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:07:45,397 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:07:45,398 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:07:45,399 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:07:45,400 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:07:45,401 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:07:45,402 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:07:45,402 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:07:45,403 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:07:45,403 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:07:45,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:07:45,405 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:07:45,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:07:45,406 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b70e7a-569b-4b73-90a0-9ff8cd5da899/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:07:45,431 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:07:45,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:07:45,432 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:07:45,432 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:07:45,433 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:07:45,433 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:07:45,433 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:07:45,433 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:07:45,434 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:07:45,434 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:07:45,434 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:07:45,434 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:07:45,435 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:07:45,435 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:07:45,435 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:07:45,435 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:07:45,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:07:45,437 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:07:45,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:07:45,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:07:45,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:07:45,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:07:45,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:07:45,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:07:45,438 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:07:45,439 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:07:45,439 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:07:45,439 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:07:45,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:07:45,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:07:45,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:07:45,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:07:45,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:07:45,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:07:45,441 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:07:45,441 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:07:45,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:07:45,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:07:45,442 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:07:45,442 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:07:45,443 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_d4b70e7a-569b-4b73-90a0-9ff8cd5da899/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b70e7a-569b-4b73-90a0-9ff8cd5da899/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03d8c36b2b461f2e971b6e7a5a6a75d5c3ec3fc4aa27ca1a57d652ec13d33c8f [2021-11-12 23:07:45,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:07:45,735 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:07:45,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:07:45,739 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:07:45,740 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:07:45,741 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b70e7a-569b-4b73-90a0-9ff8cd5da899/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/eca-rers2012/Problem04_label12.c [2021-11-12 23:07:45,804 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b70e7a-569b-4b73-90a0-9ff8cd5da899/bin/utaipan-vmNK8stdcF/data/61d030bd7/ae687f3e40574b06b95b8c8139a5847d/FLAGbee541e5f [2021-11-12 23:07:46,597 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:07:46,598 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b70e7a-569b-4b73-90a0-9ff8cd5da899/sv-benchmarks/c/eca-rers2012/Problem04_label12.c [2021-11-12 23:07:46,636 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b70e7a-569b-4b73-90a0-9ff8cd5da899/bin/utaipan-vmNK8stdcF/data/61d030bd7/ae687f3e40574b06b95b8c8139a5847d/FLAGbee541e5f [2021-11-12 23:07:47,114 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b70e7a-569b-4b73-90a0-9ff8cd5da899/bin/utaipan-vmNK8stdcF/data/61d030bd7/ae687f3e40574b06b95b8c8139a5847d [2021-11-12 23:07:47,118 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:07:47,119 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:07:47,120 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:07:47,121 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:07:47,124 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:07:47,125 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:07:47" (1/1) ... [2021-11-12 23:07:47,126 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dd80d07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:47, skipping insertion in model container [2021-11-12 23:07:47,126 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:07:47" (1/1) ... [2021-11-12 23:07:47,133 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:07:47,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:07:48,676 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_d4b70e7a-569b-4b73-90a0-9ff8cd5da899/sv-benchmarks/c/eca-rers2012/Problem04_label12.c[176369,176382] [2021-11-12 23:07:48,703 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:07:48,741 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:07:49,519 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_d4b70e7a-569b-4b73-90a0-9ff8cd5da899/sv-benchmarks/c/eca-rers2012/Problem04_label12.c[176369,176382] [2021-11-12 23:07:49,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:07:49,567 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:07:49,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:49 WrapperNode [2021-11-12 23:07:49,567 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:07:49,569 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:07:49,569 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:07:49,569 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:07:49,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:49" (1/1) ... [2021-11-12 23:07:49,661 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:49" (1/1) ... [2021-11-12 23:07:49,841 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:07:49,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:07:49,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:07:49,843 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:07:49,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:49" (1/1) ... [2021-11-12 23:07:49,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:49" (1/1) ... [2021-11-12 23:07:49,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:49" (1/1) ... [2021-11-12 23:07:49,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:49" (1/1) ... [2021-11-12 23:07:50,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:49" (1/1) ... [2021-11-12 23:07:50,073 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:49" (1/1) ... [2021-11-12 23:07:50,091 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:49" (1/1) ... [2021-11-12 23:07:50,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:07:50,114 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:07:50,114 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:07:50,114 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:07:50,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:49" (1/1) ... [2021-11-12 23:07:50,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:07:50,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b70e7a-569b-4b73-90a0-9ff8cd5da899/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:07:50,145 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b70e7a-569b-4b73-90a0-9ff8cd5da899/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:07:50,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b70e7a-569b-4b73-90a0-9ff8cd5da899/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:07:50,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:07:50,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:07:50,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:07:50,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:07:54,665 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:07:54,665 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:07:54,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:07:54 BoogieIcfgContainer [2021-11-12 23:07:54,671 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:07:54,674 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:07:54,675 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:07:54,678 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:07:54,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:07:47" (1/3) ... [2021-11-12 23:07:54,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a254c3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:07:54, skipping insertion in model container [2021-11-12 23:07:54,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:49" (2/3) ... [2021-11-12 23:07:54,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a254c3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:07:54, skipping insertion in model container [2021-11-12 23:07:54,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:07:54" (3/3) ... [2021-11-12 23:07:54,681 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem04_label12.c [2021-11-12 23:07:54,689 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:07:54,689 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:07:54,758 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:07:54,768 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:07:54,768 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:07:54,814 INFO L276 IsEmpty]: Start isEmpty. Operand has 763 states, 761 states have (on average 1.9908015768725362) internal successors, (1515), 762 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:54,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 756 [2021-11-12 23:07:54,884 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:54,886 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:54,886 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:54,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:54,893 INFO L85 PathProgramCache]: Analyzing trace with hash 2067039976, now seen corresponding path program 1 times [2021-11-12 23:07:54,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:54,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043423764] [2021-11-12 23:07:54,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:54,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:55,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:56,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:56,136 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:07:56,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043423764] [2021-11-12 23:07:56,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043423764] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:56,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:56,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 23:07:56,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759832522] [2021-11-12 23:07:56,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:56,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:07:56,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:07:56,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:07:56,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:07:56,182 INFO L87 Difference]: Start difference. First operand has 763 states, 761 states have (on average 1.9908015768725362) internal successors, (1515), 762 states have internal predecessors, (1515), 0 states have call successors, (0), 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 251.66666666666666) internal successors, (755), 2 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:59,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:59,612 INFO L93 Difference]: Finished difference Result 2285 states and 4541 transitions. [2021-11-12 23:07:59,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:07:59,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 251.66666666666666) internal successors, (755), 2 states have internal predecessors, (755), 0 states have call successors, (0), 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 755 [2021-11-12 23:07:59,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:59,656 INFO L225 Difference]: With dead ends: 2285 [2021-11-12 23:07:59,656 INFO L226 Difference]: Without dead ends: 1519 [2021-11-12 23:07:59,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:07:59,666 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 123 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 2669 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2622.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 3051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.61ms SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 2669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3284.70ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:59,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 189 Invalid, 3051 Unknown, 0 Unchecked, 20.61ms Time], IncrementalHoareTripleChecker [382 Valid, 2669 Invalid, 0 Unknown, 0 Unchecked, 3284.70ms Time] [2021-11-12 23:07:59,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2021-11-12 23:07:59,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 1519. [2021-11-12 23:07:59,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 1.878129117259552) internal successors, (2851), 1518 states have internal predecessors, (2851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:59,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 2851 transitions. [2021-11-12 23:07:59,799 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 2851 transitions. Word has length 755 [2021-11-12 23:07:59,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:59,801 INFO L470 AbstractCegarLoop]: Abstraction has 1519 states and 2851 transitions. [2021-11-12 23:07:59,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 251.66666666666666) internal successors, (755), 2 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:07:59,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 2851 transitions. [2021-11-12 23:07:59,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 760 [2021-11-12 23:07:59,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:59,827 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:59,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:07:59,828 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:59,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:59,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1504263038, now seen corresponding path program 1 times [2021-11-12 23:07:59,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:07:59,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253918521] [2021-11-12 23:07:59,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:59,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:07:59,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:00,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:00,335 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:00,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253918521] [2021-11-12 23:08:00,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253918521] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:00,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:00,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 23:08:00,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957579956] [2021-11-12 23:08:00,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:00,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:08:00,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:00,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:08:00,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:08:00,342 INFO L87 Difference]: Start difference. First operand 1519 states and 2851 transitions. Second operand has 3 states, 3 states have (on average 253.0) internal successors, (759), 2 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:03,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:03,623 INFO L93 Difference]: Finished difference Result 4553 states and 8550 transitions. [2021-11-12 23:08:03,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:08:03,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 253.0) internal successors, (759), 2 states have internal predecessors, (759), 0 states have call successors, (0), 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 759 [2021-11-12 23:08:03,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:03,642 INFO L225 Difference]: With dead ends: 4553 [2021-11-12 23:08:03,643 INFO L226 Difference]: Without dead ends: 3035 [2021-11-12 23:08:03,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:08:03,652 INFO L933 BasicCegarLoop]: 486 mSDtfsCounter, 762 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2591 mSolverCounterSat, 514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2584.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 3105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.42ms SdHoareTripleChecker+Time, 514 IncrementalHoareTripleChecker+Valid, 2591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3161.19ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:03,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [762 Valid, 492 Invalid, 3105 Unknown, 0 Unchecked, 16.42ms Time], IncrementalHoareTripleChecker [514 Valid, 2591 Invalid, 0 Unknown, 0 Unchecked, 3161.19ms Time] [2021-11-12 23:08:03,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3035 states. [2021-11-12 23:08:03,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3035 to 3035. [2021-11-12 23:08:03,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3035 states, 3034 states have (on average 1.6453526697429137) internal successors, (4992), 3034 states have internal predecessors, (4992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:03,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3035 states to 3035 states and 4992 transitions. [2021-11-12 23:08:03,809 INFO L78 Accepts]: Start accepts. Automaton has 3035 states and 4992 transitions. Word has length 759 [2021-11-12 23:08:03,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:03,811 INFO L470 AbstractCegarLoop]: Abstraction has 3035 states and 4992 transitions. [2021-11-12 23:08:03,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 253.0) internal successors, (759), 2 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:03,812 INFO L276 IsEmpty]: Start isEmpty. Operand 3035 states and 4992 transitions. [2021-11-12 23:08:03,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 765 [2021-11-12 23:08:03,851 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:03,852 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:03,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 23:08:03,853 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:03,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:03,855 INFO L85 PathProgramCache]: Analyzing trace with hash 867751750, now seen corresponding path program 1 times [2021-11-12 23:08:03,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:03,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217600543] [2021-11-12 23:08:03,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:03,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:03,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:08:04,161 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:04,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217600543] [2021-11-12 23:08:04,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217600543] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:04,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:04,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 23:08:04,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62468643] [2021-11-12 23:08:04,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:04,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:08:04,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:04,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:08:04,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:08:04,167 INFO L87 Difference]: Start difference. First operand 3035 states and 4992 transitions. Second operand has 3 states, 3 states have (on average 253.66666666666666) internal successors, (761), 2 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:07,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:07,290 INFO L93 Difference]: Finished difference Result 9101 states and 14973 transitions. [2021-11-12 23:08:07,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:08:07,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 253.66666666666666) internal successors, (761), 2 states have internal predecessors, (761), 0 states have call successors, (0), 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 764 [2021-11-12 23:08:07,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:07,325 INFO L225 Difference]: With dead ends: 9101 [2021-11-12 23:08:07,325 INFO L226 Difference]: Without dead ends: 6067 [2021-11-12 23:08:07,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:08:07,330 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 935 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2162 mSolverCounterSat, 1177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2452.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 3339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.53ms SdHoareTripleChecker+Time, 1177 IncrementalHoareTripleChecker+Valid, 2162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2993.25ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:07,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [935 Valid, 196 Invalid, 3339 Unknown, 0 Unchecked, 16.53ms Time], IncrementalHoareTripleChecker [1177 Valid, 2162 Invalid, 0 Unknown, 0 Unchecked, 2993.25ms Time] [2021-11-12 23:08:07,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6067 states. [2021-11-12 23:08:07,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6067 to 6067. [2021-11-12 23:08:07,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6067 states, 6066 states have (on average 1.5572040883613585) internal successors, (9446), 6066 states have internal predecessors, (9446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:07,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6067 states to 6067 states and 9446 transitions. [2021-11-12 23:08:07,497 INFO L78 Accepts]: Start accepts. Automaton has 6067 states and 9446 transitions. Word has length 764 [2021-11-12 23:08:07,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:07,498 INFO L470 AbstractCegarLoop]: Abstraction has 6067 states and 9446 transitions. [2021-11-12 23:08:07,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 253.66666666666666) internal successors, (761), 2 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:07,499 INFO L276 IsEmpty]: Start isEmpty. Operand 6067 states and 9446 transitions. [2021-11-12 23:08:07,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 773 [2021-11-12 23:08:07,518 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:07,519 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:07,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 23:08:07,520 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:07,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:07,521 INFO L85 PathProgramCache]: Analyzing trace with hash 115037070, now seen corresponding path program 1 times [2021-11-12 23:08:07,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:07,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877219084] [2021-11-12 23:08:07,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:07,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:07,739 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:07,739 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:07,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877219084] [2021-11-12 23:08:07,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877219084] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:07,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:07,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 23:08:07,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284466942] [2021-11-12 23:08:07,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:07,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:08:07,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:07,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:08:07,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:08:07,743 INFO L87 Difference]: Start difference. First operand 6067 states and 9446 transitions. Second operand has 3 states, 3 states have (on average 257.3333333333333) internal successors, (772), 2 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:10,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:10,821 INFO L93 Difference]: Finished difference Result 18197 states and 28335 transitions. [2021-11-12 23:08:10,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:08:10,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 257.3333333333333) internal successors, (772), 2 states have internal predecessors, (772), 0 states have call successors, (0), 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 772 [2021-11-12 23:08:10,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:10,890 INFO L225 Difference]: With dead ends: 18197 [2021-11-12 23:08:10,890 INFO L226 Difference]: Without dead ends: 12131 [2021-11-12 23:08:10,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:08:10,910 INFO L933 BasicCegarLoop]: 463 mSDtfsCounter, 1019 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1948 mSolverCounterSat, 1063 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2310.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1019 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 3011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.17ms SdHoareTripleChecker+Time, 1063 IncrementalHoareTripleChecker+Valid, 1948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2900.08ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:10,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1019 Valid, 469 Invalid, 3011 Unknown, 0 Unchecked, 19.17ms Time], IncrementalHoareTripleChecker [1063 Valid, 1948 Invalid, 0 Unknown, 0 Unchecked, 2900.08ms Time] [2021-11-12 23:08:10,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12131 states. [2021-11-12 23:08:11,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12131 to 10615. [2021-11-12 23:08:11,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10615 states, 10614 states have (on average 1.4350857358206144) internal successors, (15232), 10614 states have internal predecessors, (15232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:11,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10615 states to 10615 states and 15232 transitions. [2021-11-12 23:08:11,219 INFO L78 Accepts]: Start accepts. Automaton has 10615 states and 15232 transitions. Word has length 772 [2021-11-12 23:08:11,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:11,220 INFO L470 AbstractCegarLoop]: Abstraction has 10615 states and 15232 transitions. [2021-11-12 23:08:11,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 257.3333333333333) internal successors, (772), 2 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:11,220 INFO L276 IsEmpty]: Start isEmpty. Operand 10615 states and 15232 transitions. [2021-11-12 23:08:11,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 832 [2021-11-12 23:08:11,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:11,248 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:11,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-12 23:08:11,248 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:11,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:11,249 INFO L85 PathProgramCache]: Analyzing trace with hash -82421715, now seen corresponding path program 1 times [2021-11-12 23:08:11,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:11,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813916029] [2021-11-12 23:08:11,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:11,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:11,511 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-12 23:08:11,511 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:11,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813916029] [2021-11-12 23:08:11,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813916029] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:11,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:11,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 23:08:11,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94454598] [2021-11-12 23:08:11,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:11,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:08:11,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:11,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:08:11,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:08:11,515 INFO L87 Difference]: Start difference. First operand 10615 states and 15232 transitions. Second operand has 3 states, 3 states have (on average 256.6666666666667) internal successors, (770), 2 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:14,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:14,634 INFO L93 Difference]: Finished difference Result 28809 states and 40739 transitions. [2021-11-12 23:08:14,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:08:14,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 256.6666666666667) internal successors, (770), 2 states have internal predecessors, (770), 0 states have call successors, (0), 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 831 [2021-11-12 23:08:14,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:14,707 INFO L225 Difference]: With dead ends: 28809 [2021-11-12 23:08:14,707 INFO L226 Difference]: Without dead ends: 18195 [2021-11-12 23:08:14,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:08:14,723 INFO L933 BasicCegarLoop]: 708 mSDtfsCounter, 749 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2851 mSolverCounterSat, 386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2391.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 3237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.14ms SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 2851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2952.34ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:14,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [749 Valid, 714 Invalid, 3237 Unknown, 0 Unchecked, 11.14ms Time], IncrementalHoareTripleChecker [386 Valid, 2851 Invalid, 0 Unknown, 0 Unchecked, 2952.34ms Time] [2021-11-12 23:08:14,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18195 states. [2021-11-12 23:08:15,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18195 to 18195. [2021-11-12 23:08:15,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18195 states, 18194 states have (on average 1.3426404309112894) internal successors, (24428), 18194 states have internal predecessors, (24428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:15,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18195 states to 18195 states and 24428 transitions. [2021-11-12 23:08:15,092 INFO L78 Accepts]: Start accepts. Automaton has 18195 states and 24428 transitions. Word has length 831 [2021-11-12 23:08:15,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:15,092 INFO L470 AbstractCegarLoop]: Abstraction has 18195 states and 24428 transitions. [2021-11-12 23:08:15,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 256.6666666666667) internal successors, (770), 2 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:15,093 INFO L276 IsEmpty]: Start isEmpty. Operand 18195 states and 24428 transitions. [2021-11-12 23:08:15,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 841 [2021-11-12 23:08:15,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:15,133 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:15,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-12 23:08:15,133 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:15,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:15,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1562078640, now seen corresponding path program 1 times [2021-11-12 23:08:15,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:15,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685872303] [2021-11-12 23:08:15,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:15,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:15,379 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-12 23:08:15,380 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:15,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685872303] [2021-11-12 23:08:15,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685872303] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:15,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:15,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 23:08:15,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082025207] [2021-11-12 23:08:15,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:15,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:08:15,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:15,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:08:15,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:08:15,384 INFO L87 Difference]: Start difference. First operand 18195 states and 24428 transitions. Second operand has 3 states, 3 states have (on average 268.0) internal successors, (804), 2 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:18,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:18,140 INFO L93 Difference]: Finished difference Result 45485 states and 60705 transitions. [2021-11-12 23:08:18,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:08:18,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 268.0) internal successors, (804), 2 states have internal predecessors, (804), 0 states have call successors, (0), 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 840 [2021-11-12 23:08:18,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:18,196 INFO L225 Difference]: With dead ends: 45485 [2021-11-12 23:08:18,197 INFO L226 Difference]: Without dead ends: 27291 [2021-11-12 23:08:18,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:08:18,217 INFO L933 BasicCegarLoop]: 301 mSDtfsCounter, 927 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2048 mSolverCounterSat, 1004 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2064.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 927 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 3052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.40ms SdHoareTripleChecker+Time, 1004 IncrementalHoareTripleChecker+Valid, 2048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2565.45ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:18,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [927 Valid, 307 Invalid, 3052 Unknown, 0 Unchecked, 8.40ms Time], IncrementalHoareTripleChecker [1004 Valid, 2048 Invalid, 0 Unknown, 0 Unchecked, 2565.45ms Time] [2021-11-12 23:08:18,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27291 states. [2021-11-12 23:08:18,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27291 to 27291. [2021-11-12 23:08:18,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27291 states, 27290 states have (on average 1.2279956027849028) internal successors, (33512), 27290 states have internal predecessors, (33512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:18,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27291 states to 27291 states and 33512 transitions. [2021-11-12 23:08:18,675 INFO L78 Accepts]: Start accepts. Automaton has 27291 states and 33512 transitions. Word has length 840 [2021-11-12 23:08:18,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:18,675 INFO L470 AbstractCegarLoop]: Abstraction has 27291 states and 33512 transitions. [2021-11-12 23:08:18,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 268.0) internal successors, (804), 2 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:18,676 INFO L276 IsEmpty]: Start isEmpty. Operand 27291 states and 33512 transitions. [2021-11-12 23:08:18,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 868 [2021-11-12 23:08:18,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:18,718 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:18,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-12 23:08:18,718 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:18,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:18,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1298069277, now seen corresponding path program 1 times [2021-11-12 23:08:18,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:18,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223610034] [2021-11-12 23:08:18,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:18,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:18,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:19,039 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-12 23:08:19,039 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:19,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223610034] [2021-11-12 23:08:19,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223610034] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:08:19,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676066919] [2021-11-12 23:08:19,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:19,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:08:19,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b70e7a-569b-4b73-90a0-9ff8cd5da899/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:08:19,043 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b70e7a-569b-4b73-90a0-9ff8cd5da899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:08:19,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b70e7a-569b-4b73-90a0-9ff8cd5da899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 23:08:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:19,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 1107 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:08:19,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:20,688 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-12 23:08:20,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:22,351 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-12 23:08:22,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676066919] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:22,352 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:08:22,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 6 [2021-11-12 23:08:22,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018466240] [2021-11-12 23:08:22,354 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:22,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:08:22,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:22,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:08:22,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:08:22,357 INFO L87 Difference]: Start difference. First operand 27291 states and 33512 transitions. Second operand has 4 states, 4 states have (on average 203.75) internal successors, (815), 3 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:26,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:26,761 INFO L93 Difference]: Finished difference Result 93997 states and 115813 transitions. [2021-11-12 23:08:26,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:08:26,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 203.75) internal successors, (815), 3 states have internal predecessors, (815), 0 states have call successors, (0), 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 867 [2021-11-12 23:08:26,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:26,853 INFO L225 Difference]: With dead ends: 93997 [2021-11-12 23:08:26,853 INFO L226 Difference]: Without dead ends: 66707 [2021-11-12 23:08:26,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1736 GetRequests, 1731 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:08:26,882 INFO L933 BasicCegarLoop]: 429 mSDtfsCounter, 1655 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 3849 mSolverCounterSat, 1503 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3213.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1655 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 5352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.27ms SdHoareTripleChecker+Time, 1503 IncrementalHoareTripleChecker+Valid, 3849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4039.90ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:26,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1655 Valid, 444 Invalid, 5352 Unknown, 0 Unchecked, 14.27ms Time], IncrementalHoareTripleChecker [1503 Valid, 3849 Invalid, 0 Unknown, 0 Unchecked, 4039.90ms Time] [2021-11-12 23:08:26,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66707 states. [2021-11-12 23:08:27,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66707 to 66707. [2021-11-12 23:08:27,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66707 states, 66706 states have (on average 1.1546487572332325) internal successors, (77022), 66706 states have internal predecessors, (77022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:27,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66707 states to 66707 states and 77022 transitions. [2021-11-12 23:08:27,761 INFO L78 Accepts]: Start accepts. Automaton has 66707 states and 77022 transitions. Word has length 867 [2021-11-12 23:08:27,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:27,762 INFO L470 AbstractCegarLoop]: Abstraction has 66707 states and 77022 transitions. [2021-11-12 23:08:27,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 203.75) internal successors, (815), 3 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:27,762 INFO L276 IsEmpty]: Start isEmpty. Operand 66707 states and 77022 transitions. [2021-11-12 23:08:28,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1225 [2021-11-12 23:08:28,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:28,150 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:28,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b70e7a-569b-4b73-90a0-9ff8cd5da899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:28,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b70e7a-569b-4b73-90a0-9ff8cd5da899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:08:28,372 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:28,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:28,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1203937583, now seen corresponding path program 1 times [2021-11-12 23:08:28,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:28,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128885780] [2021-11-12 23:08:28,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:28,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:28,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 462 proven. 0 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2021-11-12 23:08:28,891 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:28,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128885780] [2021-11-12 23:08:28,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128885780] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:28,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:28,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 23:08:28,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577494164] [2021-11-12 23:08:28,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:28,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:08:28,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:28,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:08:28,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:08:28,896 INFO L87 Difference]: Start difference. First operand 66707 states and 77022 transitions. Second operand has 3 states, 3 states have (on average 328.6666666666667) internal successors, (986), 2 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:32,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:32,430 INFO L93 Difference]: Finished difference Result 152363 states and 175520 transitions. [2021-11-12 23:08:32,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:08:32,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 328.6666666666667) internal successors, (986), 2 states have internal predecessors, (986), 0 states have call successors, (0), 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 1224 [2021-11-12 23:08:32,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:32,593 INFO L225 Difference]: With dead ends: 152363 [2021-11-12 23:08:32,593 INFO L226 Difference]: Without dead ends: 85657 [2021-11-12 23:08:32,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:08:32,632 INFO L933 BasicCegarLoop]: 652 mSDtfsCounter, 543 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2104 mSolverCounterSat, 961 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2352.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 3065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.09ms SdHoareTripleChecker+Time, 961 IncrementalHoareTripleChecker+Valid, 2104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3043.02ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:32,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [543 Valid, 658 Invalid, 3065 Unknown, 0 Unchecked, 10.09ms Time], IncrementalHoareTripleChecker [961 Valid, 2104 Invalid, 0 Unknown, 0 Unchecked, 3043.02ms Time] [2021-11-12 23:08:32,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85657 states. [2021-11-12 23:08:33,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85657 to 85657. [2021-11-12 23:08:33,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85657 states, 85656 states have (on average 1.133265620622023) internal successors, (97071), 85656 states have internal predecessors, (97071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:34,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85657 states to 85657 states and 97071 transitions. [2021-11-12 23:08:34,091 INFO L78 Accepts]: Start accepts. Automaton has 85657 states and 97071 transitions. Word has length 1224 [2021-11-12 23:08:34,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:34,091 INFO L470 AbstractCegarLoop]: Abstraction has 85657 states and 97071 transitions. [2021-11-12 23:08:34,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 328.6666666666667) internal successors, (986), 2 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:34,092 INFO L276 IsEmpty]: Start isEmpty. Operand 85657 states and 97071 transitions. [2021-11-12 23:08:34,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1235 [2021-11-12 23:08:34,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:34,388 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:34,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-12 23:08:34,388 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:34,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:34,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1015028184, now seen corresponding path program 1 times [2021-11-12 23:08:34,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:34,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664351269] [2021-11-12 23:08:34,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:34,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:34,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:34,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1229 backedges. 426 proven. 0 refuted. 0 times theorem prover too weak. 803 trivial. 0 not checked. [2021-11-12 23:08:34,882 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:34,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664351269] [2021-11-12 23:08:34,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664351269] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:34,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:34,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:08:34,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006902414] [2021-11-12 23:08:34,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:34,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:08:34,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:34,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:08:34,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:08:34,887 INFO L87 Difference]: Start difference. First operand 85657 states and 97071 transitions. Second operand has 3 states, 3 states have (on average 281.3333333333333) internal successors, (844), 3 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:38,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:38,132 INFO L93 Difference]: Finished difference Result 186473 states and 212561 transitions. [2021-11-12 23:08:38,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:08:38,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 281.3333333333333) internal successors, (844), 3 states have internal predecessors, (844), 0 states have call successors, (0), 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 1234 [2021-11-12 23:08:38,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:38,256 INFO L225 Difference]: With dead ends: 186473 [2021-11-12 23:08:38,257 INFO L226 Difference]: Without dead ends: 100817 [2021-11-12 23:08:38,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:08:38,305 INFO L933 BasicCegarLoop]: 1248 mSDtfsCounter, 725 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2216 mSolverCounterSat, 997 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2099.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 1255 SdHoareTripleChecker+Invalid, 3213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.88ms SdHoareTripleChecker+Time, 997 IncrementalHoareTripleChecker+Valid, 2216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2746.13ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:38,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [725 Valid, 1255 Invalid, 3213 Unknown, 0 Unchecked, 9.88ms Time], IncrementalHoareTripleChecker [997 Valid, 2216 Invalid, 0 Unknown, 0 Unchecked, 2746.13ms Time] [2021-11-12 23:08:38,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100817 states. [2021-11-12 23:08:39,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100817 to 97785. [2021-11-12 23:08:39,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97785 states, 97784 states have (on average 1.1323938476642395) internal successors, (110730), 97784 states have internal predecessors, (110730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:39,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97785 states to 97785 states and 110730 transitions. [2021-11-12 23:08:39,961 INFO L78 Accepts]: Start accepts. Automaton has 97785 states and 110730 transitions. Word has length 1234 [2021-11-12 23:08:39,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:39,961 INFO L470 AbstractCegarLoop]: Abstraction has 97785 states and 110730 transitions. [2021-11-12 23:08:39,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 281.3333333333333) internal successors, (844), 3 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:39,962 INFO L276 IsEmpty]: Start isEmpty. Operand 97785 states and 110730 transitions. [2021-11-12 23:08:40,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1250 [2021-11-12 23:08:40,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:40,013 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:40,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-12 23:08:40,014 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:40,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:40,015 INFO L85 PathProgramCache]: Analyzing trace with hash 598801790, now seen corresponding path program 1 times [2021-11-12 23:08:40,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:40,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476522635] [2021-11-12 23:08:40,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:40,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:40,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:40,856 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 701 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-12 23:08:40,856 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:40,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476522635] [2021-11-12 23:08:40,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476522635] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:40,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:40,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:08:40,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335777204] [2021-11-12 23:08:40,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:40,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:08:40,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:40,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:08:40,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:08:40,861 INFO L87 Difference]: Start difference. First operand 97785 states and 110730 transitions. Second operand has 3 states, 3 states have (on average 383.0) internal successors, (1149), 3 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:44,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:44,167 INFO L93 Difference]: Finished difference Result 206181 states and 234646 transitions. [2021-11-12 23:08:44,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:08:44,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 383.0) internal successors, (1149), 3 states have internal predecessors, (1149), 0 states have call successors, (0), 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 1249 [2021-11-12 23:08:44,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:44,268 INFO L225 Difference]: With dead ends: 206181 [2021-11-12 23:08:44,269 INFO L226 Difference]: Without dead ends: 108397 [2021-11-12 23:08:44,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:08:44,305 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 741 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2249 mSolverCounterSat, 1166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2112.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 3415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.93ms SdHoareTripleChecker+Time, 1166 IncrementalHoareTripleChecker+Valid, 2249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2608.01ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:44,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [741 Valid, 247 Invalid, 3415 Unknown, 0 Unchecked, 7.93ms Time], IncrementalHoareTripleChecker [1166 Valid, 2249 Invalid, 0 Unknown, 0 Unchecked, 2608.01ms Time] [2021-11-12 23:08:44,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108397 states. [2021-11-12 23:08:45,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108397 to 106881. [2021-11-12 23:08:45,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106881 states, 106880 states have (on average 1.1403349550898203) internal successors, (121879), 106880 states have internal predecessors, (121879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:45,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106881 states to 106881 states and 121879 transitions. [2021-11-12 23:08:45,719 INFO L78 Accepts]: Start accepts. Automaton has 106881 states and 121879 transitions. Word has length 1249 [2021-11-12 23:08:45,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:45,719 INFO L470 AbstractCegarLoop]: Abstraction has 106881 states and 121879 transitions. [2021-11-12 23:08:45,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 383.0) internal successors, (1149), 3 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:45,720 INFO L276 IsEmpty]: Start isEmpty. Operand 106881 states and 121879 transitions. [2021-11-12 23:08:45,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1347 [2021-11-12 23:08:45,790 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:45,791 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:45,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-12 23:08:45,792 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:45,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:45,792 INFO L85 PathProgramCache]: Analyzing trace with hash -726889530, now seen corresponding path program 1 times [2021-11-12 23:08:45,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:45,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013840620] [2021-11-12 23:08:45,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:45,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:45,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:46,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 1177 proven. 0 refuted. 0 times theorem prover too weak. 398 trivial. 0 not checked. [2021-11-12 23:08:46,710 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:46,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013840620] [2021-11-12 23:08:46,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013840620] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:46,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:46,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:08:46,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115703103] [2021-11-12 23:08:46,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:46,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:08:46,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:46,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:08:46,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:08:46,715 INFO L87 Difference]: Start difference. First operand 106881 states and 121879 transitions. Second operand has 3 states, 3 states have (on average 357.6666666666667) internal successors, (1073), 3 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:50,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:50,728 INFO L93 Difference]: Finished difference Result 213761 states and 243757 transitions. [2021-11-12 23:08:50,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:08:50,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 357.6666666666667) internal successors, (1073), 3 states have internal predecessors, (1073), 0 states have call successors, (0), 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 1346 [2021-11-12 23:08:50,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:50,853 INFO L225 Difference]: With dead ends: 213761 [2021-11-12 23:08:50,853 INFO L226 Difference]: Without dead ends: 106881 [2021-11-12 23:08:50,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:08:50,887 INFO L933 BasicCegarLoop]: 1117 mSDtfsCounter, 603 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2800 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2329.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 3114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.41ms SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 2800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2920.74ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:50,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 1124 Invalid, 3114 Unknown, 0 Unchecked, 13.41ms Time], IncrementalHoareTripleChecker [314 Valid, 2800 Invalid, 0 Unknown, 0 Unchecked, 2920.74ms Time] [2021-11-12 23:08:50,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106881 states. [2021-11-12 23:08:52,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106881 to 101575. [2021-11-12 23:08:52,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101575 states, 101574 states have (on average 1.1246381948136335) internal successors, (114234), 101574 states have internal predecessors, (114234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:52,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101575 states to 101575 states and 114234 transitions. [2021-11-12 23:08:52,597 INFO L78 Accepts]: Start accepts. Automaton has 101575 states and 114234 transitions. Word has length 1346 [2021-11-12 23:08:52,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:52,598 INFO L470 AbstractCegarLoop]: Abstraction has 101575 states and 114234 transitions. [2021-11-12 23:08:52,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 357.6666666666667) internal successors, (1073), 3 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:52,598 INFO L276 IsEmpty]: Start isEmpty. Operand 101575 states and 114234 transitions. [2021-11-12 23:08:53,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1383 [2021-11-12 23:08:53,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:53,119 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:53,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-12 23:08:53,120 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:53,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:53,121 INFO L85 PathProgramCache]: Analyzing trace with hash -715030518, now seen corresponding path program 1 times [2021-11-12 23:08:53,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:53,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006398763] [2021-11-12 23:08:53,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:53,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:53,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1440 backedges. 1129 proven. 89 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-12 23:08:53,811 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:53,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006398763] [2021-11-12 23:08:53,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006398763] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:08:53,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444372478] [2021-11-12 23:08:53,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:53,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:08:53,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b70e7a-569b-4b73-90a0-9ff8cd5da899/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:08:53,816 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b70e7a-569b-4b73-90a0-9ff8cd5da899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:08:53,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b70e7a-569b-4b73-90a0-9ff8cd5da899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-12 23:08:54,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:54,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 1695 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:08:54,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1440 backedges. 1143 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-12 23:08:57,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:59,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1440 backedges. 1143 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-12 23:08:59,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444372478] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:59,426 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:08:59,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2021-11-12 23:08:59,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293004979] [2021-11-12 23:08:59,428 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:59,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:08:59,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:59,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:08:59,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:08:59,433 INFO L87 Difference]: Start difference. First operand 101575 states and 114234 transitions. Second operand has 3 states, 3 states have (on average 386.0) internal successors, (1158), 3 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:03,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:03,056 INFO L93 Difference]: Finished difference Result 213761 states and 240759 transitions. [2021-11-12 23:09:03,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:09:03,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 386.0) internal successors, (1158), 3 states have internal predecessors, (1158), 0 states have call successors, (0), 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 1382 [2021-11-12 23:09:03,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:03,211 INFO L225 Difference]: With dead ends: 213761 [2021-11-12 23:09:03,211 INFO L226 Difference]: Without dead ends: 112187 [2021-11-12 23:09:03,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2767 GetRequests, 2761 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:09:03,250 INFO L933 BasicCegarLoop]: 1286 mSDtfsCounter, 713 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1972 mSolverCounterSat, 858 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2210.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 1293 SdHoareTripleChecker+Invalid, 2830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.42ms SdHoareTripleChecker+Time, 858 IncrementalHoareTripleChecker+Valid, 1972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2740.23ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:03,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [713 Valid, 1293 Invalid, 2830 Unknown, 0 Unchecked, 11.42ms Time], IncrementalHoareTripleChecker [858 Valid, 1972 Invalid, 0 Unknown, 0 Unchecked, 2740.23ms Time] [2021-11-12 23:09:03,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112187 states. [2021-11-12 23:09:04,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112187 to 106123. [2021-11-12 23:09:04,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106123 states, 106122 states have (on average 1.1078193023124328) internal successors, (117564), 106122 states have internal predecessors, (117564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:04,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106123 states to 106123 states and 117564 transitions. [2021-11-12 23:09:04,841 INFO L78 Accepts]: Start accepts. Automaton has 106123 states and 117564 transitions. Word has length 1382 [2021-11-12 23:09:04,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:04,842 INFO L470 AbstractCegarLoop]: Abstraction has 106123 states and 117564 transitions. [2021-11-12 23:09:04,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 386.0) internal successors, (1158), 3 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:04,842 INFO L276 IsEmpty]: Start isEmpty. Operand 106123 states and 117564 transitions. [2021-11-12 23:09:04,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1502 [2021-11-12 23:09:04,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:04,921 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:04,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b70e7a-569b-4b73-90a0-9ff8cd5da899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:09:05,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4b70e7a-569b-4b73-90a0-9ff8cd5da899/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-12 23:09:05,124 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:05,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:05,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1068313102, now seen corresponding path program 1 times [2021-11-12 23:09:05,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:09:05,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634932990] [2021-11-12 23:09:05,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:05,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:09:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:06,440 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 785 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-12 23:09:06,441 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:09:06,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634932990] [2021-11-12 23:09:06,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634932990] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:06,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:09:06,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:09:06,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774310797] [2021-11-12 23:09:06,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:06,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:09:06,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:09:06,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:09:06,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:09:06,446 INFO L87 Difference]: Start difference. First operand 106123 states and 117564 transitions. Second operand has 4 states, 4 states have (on average 348.0) internal successors, (1392), 3 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:11,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:11,280 INFO L93 Difference]: Finished difference Result 218309 states and 241497 transitions. [2021-11-12 23:09:11,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:09:11,281 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 348.0) internal successors, (1392), 3 states have internal predecessors, (1392), 0 states have call successors, (0), 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 1501 [2021-11-12 23:09:11,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:11,406 INFO L225 Difference]: With dead ends: 218309 [2021-11-12 23:09:11,408 INFO L226 Difference]: Without dead ends: 112187 [2021-11-12 23:09:11,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:09:11,456 INFO L933 BasicCegarLoop]: 467 mSDtfsCounter, 1176 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 3617 mSolverCounterSat, 1487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3097.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1176 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 5104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.36ms SdHoareTripleChecker+Time, 1487 IncrementalHoareTripleChecker+Valid, 3617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3862.02ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:11,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1176 Valid, 480 Invalid, 5104 Unknown, 0 Unchecked, 26.36ms Time], IncrementalHoareTripleChecker [1487 Valid, 3617 Invalid, 0 Unknown, 0 Unchecked, 3862.02ms Time] [2021-11-12 23:09:11,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112187 states. [2021-11-12 23:09:12,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112187 to 112187. [2021-11-12 23:09:13,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112187 states, 112186 states have (on average 1.1038097445314032) internal successors, (123832), 112186 states have internal predecessors, (123832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:13,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112187 states to 112187 states and 123832 transitions. [2021-11-12 23:09:13,225 INFO L78 Accepts]: Start accepts. Automaton has 112187 states and 123832 transitions. Word has length 1501 [2021-11-12 23:09:13,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:13,226 INFO L470 AbstractCegarLoop]: Abstraction has 112187 states and 123832 transitions. [2021-11-12 23:09:13,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 348.0) internal successors, (1392), 3 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:13,226 INFO L276 IsEmpty]: Start isEmpty. Operand 112187 states and 123832 transitions. [2021-11-12 23:09:13,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1527 [2021-11-12 23:09:13,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:13,335 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:13,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-12 23:09:13,335 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:13,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:13,337 INFO L85 PathProgramCache]: Analyzing trace with hash -605544601, now seen corresponding path program 1 times [2021-11-12 23:09:13,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:09:13,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276432927] [2021-11-12 23:09:13,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:13,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:09:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:14,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1702 backedges. 1062 proven. 0 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2021-11-12 23:09:14,539 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:09:14,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276432927] [2021-11-12 23:09:14,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276432927] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:14,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:09:14,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:09:14,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823122974] [2021-11-12 23:09:14,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:14,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:09:14,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:09:14,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:09:14,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:09:14,546 INFO L87 Difference]: Start difference. First operand 112187 states and 123832 transitions. Second operand has 3 states, 3 states have (on average 359.3333333333333) internal successors, (1078), 3 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:18,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:18,489 INFO L93 Difference]: Finished difference Result 230437 states and 254183 transitions. [2021-11-12 23:09:18,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:09:18,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 359.3333333333333) internal successors, (1078), 3 states have internal predecessors, (1078), 0 states have call successors, (0), 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 1526 [2021-11-12 23:09:18,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:18,619 INFO L225 Difference]: With dead ends: 230437 [2021-11-12 23:09:18,620 INFO L226 Difference]: Without dead ends: 118251 [2021-11-12 23:09:18,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:09:18,646 INFO L933 BasicCegarLoop]: 1341 mSDtfsCounter, 751 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2979 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2351.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 1348 SdHoareTripleChecker+Invalid, 3259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.63ms SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 2979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2917.48ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:18,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [751 Valid, 1348 Invalid, 3259 Unknown, 0 Unchecked, 16.63ms Time], IncrementalHoareTripleChecker [280 Valid, 2979 Invalid, 0 Unknown, 0 Unchecked, 2917.48ms Time] [2021-11-12 23:09:18,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118251 states. [2021-11-12 23:09:19,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118251 to 112187. [2021-11-12 23:09:19,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112187 states, 112186 states have (on average 1.0975701067869432) internal successors, (123132), 112186 states have internal predecessors, (123132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:20,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112187 states to 112187 states and 123132 transitions. [2021-11-12 23:09:20,077 INFO L78 Accepts]: Start accepts. Automaton has 112187 states and 123132 transitions. Word has length 1526 [2021-11-12 23:09:20,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:20,078 INFO L470 AbstractCegarLoop]: Abstraction has 112187 states and 123132 transitions. [2021-11-12 23:09:20,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 359.3333333333333) internal successors, (1078), 3 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:20,078 INFO L276 IsEmpty]: Start isEmpty. Operand 112187 states and 123132 transitions. [2021-11-12 23:09:20,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1793 [2021-11-12 23:09:20,171 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:20,172 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 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, 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:20,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-12 23:09:20,172 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:20,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:20,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1457771598, now seen corresponding path program 1 times [2021-11-12 23:09:20,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:09:20,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186430832] [2021-11-12 23:09:20,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:20,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:09:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:21,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 870 proven. 0 refuted. 0 times theorem prover too weak. 824 trivial. 0 not checked. [2021-11-12 23:09:21,592 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:09:21,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186430832] [2021-11-12 23:09:21,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186430832] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:21,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:09:21,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:09:21,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369213335] [2021-11-12 23:09:21,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:21,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:09:21,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:09:21,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:09:21,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:09:21,597 INFO L87 Difference]: Start difference. First operand 112187 states and 123132 transitions. Second operand has 4 states, 4 states have (on average 276.5) internal successors, (1106), 3 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:26,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:26,326 INFO L93 Difference]: Finished difference Result 224373 states and 246263 transitions. [2021-11-12 23:09:26,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:09:26,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 276.5) internal successors, (1106), 3 states have internal predecessors, (1106), 0 states have call successors, (0), 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 1792 [2021-11-12 23:09:26,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:26,438 INFO L225 Difference]: With dead ends: 224373 [2021-11-12 23:09:26,438 INFO L226 Difference]: Without dead ends: 112187 [2021-11-12 23:09:26,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:09:26,465 INFO L933 BasicCegarLoop]: 300 mSDtfsCounter, 1223 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 4705 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3050.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1223 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 5079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.07ms SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 4705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3754.25ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:26,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1223 Valid, 313 Invalid, 5079 Unknown, 0 Unchecked, 18.07ms Time], IncrementalHoareTripleChecker [374 Valid, 4705 Invalid, 0 Unknown, 0 Unchecked, 3754.25ms Time] [2021-11-12 23:09:26,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112187 states. [2021-11-12 23:09:27,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112187 to 112187. [2021-11-12 23:09:27,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112187 states, 112186 states have (on average 1.0846273153512915) internal successors, (121680), 112186 states have internal predecessors, (121680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:27,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112187 states to 112187 states and 121680 transitions. [2021-11-12 23:09:27,832 INFO L78 Accepts]: Start accepts. Automaton has 112187 states and 121680 transitions. Word has length 1792 [2021-11-12 23:09:27,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:27,833 INFO L470 AbstractCegarLoop]: Abstraction has 112187 states and 121680 transitions. [2021-11-12 23:09:27,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 276.5) internal successors, (1106), 3 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:27,834 INFO L276 IsEmpty]: Start isEmpty. Operand 112187 states and 121680 transitions. [2021-11-12 23:09:27,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1799 [2021-11-12 23:09:27,928 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:27,929 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 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, 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, 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:27,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-12 23:09:27,930 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:27,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:27,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1838613750, now seen corresponding path program 1 times [2021-11-12 23:09:27,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:09:27,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209315996] [2021-11-12 23:09:27,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:27,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:09:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:28,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1730 backedges. 894 proven. 0 refuted. 0 times theorem prover too weak. 836 trivial. 0 not checked. [2021-11-12 23:09:28,671 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:09:28,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209315996] [2021-11-12 23:09:28,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209315996] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:28,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:09:28,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:09:28,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540429666] [2021-11-12 23:09:28,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:28,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:09:28,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:09:28,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:09:28,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:09:28,676 INFO L87 Difference]: Start difference. First operand 112187 states and 121680 transitions. Second operand has 3 states, 3 states have (on average 367.0) internal successors, (1101), 3 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:31,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:31,807 INFO L93 Difference]: Finished difference Result 228163 states and 247215 transitions. [2021-11-12 23:09:31,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:09:31,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 367.0) internal successors, (1101), 3 states have internal predecessors, (1101), 0 states have call successors, (0), 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 1798 [2021-11-12 23:09:31,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:31,911 INFO L225 Difference]: With dead ends: 228163 [2021-11-12 23:09:31,911 INFO L226 Difference]: Without dead ends: 110671 [2021-11-12 23:09:31,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:09:31,960 INFO L933 BasicCegarLoop]: 1441 mSDtfsCounter, 491 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1837 mSolverCounterSat, 700 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1772.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 1447 SdHoareTripleChecker+Invalid, 2537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.23ms SdHoareTripleChecker+Time, 700 IncrementalHoareTripleChecker+Valid, 1837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2599.08ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:31,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 1447 Invalid, 2537 Unknown, 0 Unchecked, 8.23ms Time], IncrementalHoareTripleChecker [700 Valid, 1837 Invalid, 0 Unknown, 0 Unchecked, 2599.08ms Time] [2021-11-12 23:09:32,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110671 states. [2021-11-12 23:09:33,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110671 to 109155. [2021-11-12 23:09:33,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109155 states, 109154 states have (on average 1.0247815013650439) internal successors, (111859), 109154 states have internal predecessors, (111859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:34,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109155 states to 109155 states and 111859 transitions. [2021-11-12 23:09:34,086 INFO L78 Accepts]: Start accepts. Automaton has 109155 states and 111859 transitions. Word has length 1798 [2021-11-12 23:09:34,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:34,086 INFO L470 AbstractCegarLoop]: Abstraction has 109155 states and 111859 transitions. [2021-11-12 23:09:34,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 367.0) internal successors, (1101), 3 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:34,087 INFO L276 IsEmpty]: Start isEmpty. Operand 109155 states and 111859 transitions. [2021-11-12 23:09:34,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1884 [2021-11-12 23:09:34,171 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:34,172 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:34,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-12 23:09:34,173 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:34,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:34,174 INFO L85 PathProgramCache]: Analyzing trace with hash 669194883, now seen corresponding path program 1 times [2021-11-12 23:09:34,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:09:34,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446808499] [2021-11-12 23:09:34,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:34,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:09:34,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:34,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2613 backedges. 1714 proven. 0 refuted. 0 times theorem prover too weak. 899 trivial. 0 not checked. [2021-11-12 23:09:34,855 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:09:34,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446808499] [2021-11-12 23:09:34,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446808499] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:34,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:09:34,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:09:34,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730479276] [2021-11-12 23:09:34,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:34,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:09:34,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:09:34,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:09:34,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:09:34,859 INFO L87 Difference]: Start difference. First operand 109155 states and 111859 transitions. Second operand has 3 states, 3 states have (on average 382.0) internal successors, (1146), 3 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)