./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem02_label23.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d53d23-862f-47da-bddd-44b3fea4a446/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d53d23-862f-47da-bddd-44b3fea4a446/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d53d23-862f-47da-bddd-44b3fea4a446/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d53d23-862f-47da-bddd-44b3fea4a446/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem02_label23.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d53d23-862f-47da-bddd-44b3fea4a446/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d53d23-862f-47da-bddd-44b3fea4a446/bin/utaipan-EQgc7hIp5V --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 db3674d4e110d61289adcfc52216f8004ef1ec49416f84e6bf350103cb2e8879 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:54:45,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:54:45,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:54:46,025 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:54:46,025 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:54:46,027 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:54:46,028 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:54:46,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:54:46,033 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:54:46,034 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:54:46,035 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:54:46,037 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:54:46,038 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:54:46,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:54:46,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:54:46,042 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:54:46,043 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:54:46,045 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:54:46,047 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:54:46,050 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:54:46,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:54:46,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:54:46,054 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:54:46,055 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:54:46,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:54:46,059 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:54:46,060 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:54:46,061 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:54:46,061 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:54:46,063 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:54:46,063 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:54:46,064 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:54:46,065 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:54:46,066 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:54:46,067 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:54:46,067 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:54:46,068 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:54:46,068 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:54:46,068 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:54:46,069 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:54:46,070 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:54:46,071 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d53d23-862f-47da-bddd-44b3fea4a446/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:54:46,100 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:54:46,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:54:46,101 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:54:46,101 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:54:46,102 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:54:46,102 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:54:46,102 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:54:46,102 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:54:46,103 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:54:46,103 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:54:46,103 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:54:46,103 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:54:46,103 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:54:46,104 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:54:46,104 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:54:46,104 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:54:46,104 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:54:46,105 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:54:46,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:54:46,106 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:54:46,106 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:54:46,109 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:54:46,110 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:54:46,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:54:46,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:54:46,110 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:54:46,111 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:54:46,111 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:54:46,111 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:54:46,111 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:54:46,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:54:46,112 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:54:46,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:54:46,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:54:46,112 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:54:46,113 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:54:46,113 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:54:46,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:54:46,115 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:54:46,116 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:54:46,116 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:54:46,116 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_a1d53d23-862f-47da-bddd-44b3fea4a446/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d53d23-862f-47da-bddd-44b3fea4a446/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db3674d4e110d61289adcfc52216f8004ef1ec49416f84e6bf350103cb2e8879 [2021-11-23 03:54:46,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:54:46,385 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:54:46,387 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:54:46,389 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:54:46,389 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:54:46,391 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d53d23-862f-47da-bddd-44b3fea4a446/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/eca-rers2012/Problem02_label23.c [2021-11-23 03:54:46,457 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d53d23-862f-47da-bddd-44b3fea4a446/bin/utaipan-EQgc7hIp5V/data/c7c79c231/56f920409c3b4914b3ca674ceda7e361/FLAG5d94d6361 [2021-11-23 03:54:46,985 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:54:46,985 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d53d23-862f-47da-bddd-44b3fea4a446/sv-benchmarks/c/eca-rers2012/Problem02_label23.c [2021-11-23 03:54:47,017 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d53d23-862f-47da-bddd-44b3fea4a446/bin/utaipan-EQgc7hIp5V/data/c7c79c231/56f920409c3b4914b3ca674ceda7e361/FLAG5d94d6361 [2021-11-23 03:54:47,272 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d53d23-862f-47da-bddd-44b3fea4a446/bin/utaipan-EQgc7hIp5V/data/c7c79c231/56f920409c3b4914b3ca674ceda7e361 [2021-11-23 03:54:47,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:54:47,276 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:54:47,278 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:54:47,278 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:54:47,282 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:54:47,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:54:47" (1/1) ... [2021-11-23 03:54:47,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e089249 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:47, skipping insertion in model container [2021-11-23 03:54:47,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:54:47" (1/1) ... [2021-11-23 03:54:47,291 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:54:47,340 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:54:47,681 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d53d23-862f-47da-bddd-44b3fea4a446/sv-benchmarks/c/eca-rers2012/Problem02_label23.c[20538,20551] [2021-11-23 03:54:47,712 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:54:47,733 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:54:47,805 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d53d23-862f-47da-bddd-44b3fea4a446/sv-benchmarks/c/eca-rers2012/Problem02_label23.c[20538,20551] [2021-11-23 03:54:47,811 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:54:47,825 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:54:47,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:47 WrapperNode [2021-11-23 03:54:47,825 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:54:47,826 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:54:47,826 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:54:47,827 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:54:47,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:47" (1/1) ... [2021-11-23 03:54:47,851 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:47" (1/1) ... [2021-11-23 03:54:47,911 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 668 [2021-11-23 03:54:47,912 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:54:47,913 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:54:47,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:54:47,913 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:54:47,922 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:47" (1/1) ... [2021-11-23 03:54:47,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:47" (1/1) ... [2021-11-23 03:54:47,936 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:47" (1/1) ... [2021-11-23 03:54:47,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:47" (1/1) ... [2021-11-23 03:54:47,982 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:47" (1/1) ... [2021-11-23 03:54:47,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:47" (1/1) ... [2021-11-23 03:54:48,018 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:47" (1/1) ... [2021-11-23 03:54:48,024 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:54:48,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:54:48,027 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:54:48,027 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:54:48,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:47" (1/1) ... [2021-11-23 03:54:48,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:54:48,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d53d23-862f-47da-bddd-44b3fea4a446/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:54:48,060 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d53d23-862f-47da-bddd-44b3fea4a446/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:54:48,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d53d23-862f-47da-bddd-44b3fea4a446/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:54:48,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:54:48,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:54:48,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:54:48,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:54:48,171 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:54:48,172 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:54:49,140 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:54:49,363 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:54:49,363 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 03:54:49,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:54:49 BoogieIcfgContainer [2021-11-23 03:54:49,367 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:54:49,371 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:54:49,371 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:54:49,374 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:54:49,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:54:47" (1/3) ... [2021-11-23 03:54:49,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f07f861 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:54:49, skipping insertion in model container [2021-11-23 03:54:49,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:47" (2/3) ... [2021-11-23 03:54:49,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f07f861 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:54:49, skipping insertion in model container [2021-11-23 03:54:49,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:54:49" (3/3) ... [2021-11-23 03:54:49,377 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem02_label23.c [2021-11-23 03:54:49,386 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:54:49,386 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:54:49,449 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:54:49,458 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 [2021-11-23 03:54:49,459 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:54:49,475 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 83 states have (on average 1.9518072289156627) internal successors, (162), 84 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:49,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-23 03:54:49,484 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:49,485 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] [2021-11-23 03:54:49,485 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:49,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:49,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1243333622, now seen corresponding path program 1 times [2021-11-23 03:54:49,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:49,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148412817] [2021-11-23 03:54:49,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:49,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:49,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:49,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:49,810 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:54:49,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148412817] [2021-11-23 03:54:49,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148412817] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:49,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:49,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:54:49,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852458396] [2021-11-23 03:54:49,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:49,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:54:49,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:54:49,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:54:49,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:54:49,927 INFO L87 Difference]: Start difference. First operand has 85 states, 83 states have (on average 1.9518072289156627) internal successors, (162), 84 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:50,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:50,309 INFO L93 Difference]: Finished difference Result 251 states and 482 transitions. [2021-11-23 03:54:50,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:54:50,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-11-23 03:54:50,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:50,329 INFO L225 Difference]: With dead ends: 251 [2021-11-23 03:54:50,330 INFO L226 Difference]: Without dead ends: 163 [2021-11-23 03:54:50,333 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 [2021-11-23 03:54:50,344 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 20 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:50,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 55 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:54:50,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-23 03:54:50,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2021-11-23 03:54:50,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.8395061728395061) internal successors, (298), 162 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:50,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 298 transitions. [2021-11-23 03:54:50,425 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 298 transitions. Word has length 80 [2021-11-23 03:54:50,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:50,426 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 298 transitions. [2021-11-23 03:54:50,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:50,427 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 298 transitions. [2021-11-23 03:54:50,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-23 03:54:50,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:50,433 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] [2021-11-23 03:54:50,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:54:50,438 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:50,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:50,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1833075691, now seen corresponding path program 1 times [2021-11-23 03:54:50,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:50,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639412446] [2021-11-23 03:54:50,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:50,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:50,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:50,548 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:54:50,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639412446] [2021-11-23 03:54:50,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639412446] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:50,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:50,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:54:50,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211182056] [2021-11-23 03:54:50,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:50,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:54:50,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:54:50,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:54:50,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:54:50,554 INFO L87 Difference]: Start difference. First operand 163 states and 298 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:50,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:50,928 INFO L93 Difference]: Finished difference Result 485 states and 891 transitions. [2021-11-23 03:54:50,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:54:50,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-11-23 03:54:50,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:50,932 INFO L225 Difference]: With dead ends: 485 [2021-11-23 03:54:50,932 INFO L226 Difference]: Without dead ends: 323 [2021-11-23 03:54:50,934 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 [2021-11-23 03:54:50,935 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 78 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:50,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 63 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:54:50,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-11-23 03:54:50,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2021-11-23 03:54:50,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.515527950310559) internal successors, (488), 322 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:50,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 488 transitions. [2021-11-23 03:54:50,953 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 488 transitions. Word has length 84 [2021-11-23 03:54:50,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:50,954 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 488 transitions. [2021-11-23 03:54:50,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:50,954 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 488 transitions. [2021-11-23 03:54:50,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-23 03:54:50,958 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:50,958 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] [2021-11-23 03:54:50,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:54:50,959 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:50,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:50,959 INFO L85 PathProgramCache]: Analyzing trace with hash -2045172432, now seen corresponding path program 1 times [2021-11-23 03:54:50,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:50,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28954656] [2021-11-23 03:54:50,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:50,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:50,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:51,055 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:51,055 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:54:51,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28954656] [2021-11-23 03:54:51,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28954656] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:51,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:51,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:54:51,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104994582] [2021-11-23 03:54:51,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:51,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:54:51,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:54:51,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:54:51,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:54:51,059 INFO L87 Difference]: Start difference. First operand 323 states and 488 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:51,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:51,427 INFO L93 Difference]: Finished difference Result 805 states and 1271 transitions. [2021-11-23 03:54:51,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:54:51,427 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 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 89 [2021-11-23 03:54:51,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:51,430 INFO L225 Difference]: With dead ends: 805 [2021-11-23 03:54:51,430 INFO L226 Difference]: Without dead ends: 483 [2021-11-23 03:54:51,432 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 [2021-11-23 03:54:51,433 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 77 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:51,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 139 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:54:51,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-11-23 03:54:51,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 483. [2021-11-23 03:54:51,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 1.4066390041493777) internal successors, (678), 482 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:51,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 678 transitions. [2021-11-23 03:54:51,453 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 678 transitions. Word has length 89 [2021-11-23 03:54:51,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:51,453 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 678 transitions. [2021-11-23 03:54:51,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:51,454 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 678 transitions. [2021-11-23 03:54:51,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-23 03:54:51,456 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:51,457 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:54:51,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:54:51,457 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:51,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:51,458 INFO L85 PathProgramCache]: Analyzing trace with hash 2122130693, now seen corresponding path program 1 times [2021-11-23 03:54:51,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:51,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447677198] [2021-11-23 03:54:51,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:51,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:51,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:51,553 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:51,553 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:54:51,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447677198] [2021-11-23 03:54:51,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447677198] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:51,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:51,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:54:51,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138560486] [2021-11-23 03:54:51,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:51,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:54:51,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:54:51,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:54:51,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:54:51,556 INFO L87 Difference]: Start difference. First operand 483 states and 678 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:51,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:51,904 INFO L93 Difference]: Finished difference Result 1205 states and 1701 transitions. [2021-11-23 03:54:51,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:54:51,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 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 89 [2021-11-23 03:54:51,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:51,909 INFO L225 Difference]: With dead ends: 1205 [2021-11-23 03:54:51,909 INFO L226 Difference]: Without dead ends: 723 [2021-11-23 03:54:51,910 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 [2021-11-23 03:54:51,912 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:51,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 147 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:54:51,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-11-23 03:54:51,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 723. [2021-11-23 03:54:51,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 1.31994459833795) internal successors, (953), 722 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:51,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 953 transitions. [2021-11-23 03:54:51,933 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 953 transitions. Word has length 89 [2021-11-23 03:54:51,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:51,933 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 953 transitions. [2021-11-23 03:54:51,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:51,934 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 953 transitions. [2021-11-23 03:54:51,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-23 03:54:51,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:51,936 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:54:51,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:54:51,937 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:51,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:51,937 INFO L85 PathProgramCache]: Analyzing trace with hash 131061231, now seen corresponding path program 1 times [2021-11-23 03:54:51,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:51,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719011484] [2021-11-23 03:54:51,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:51,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:51,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:54:52,009 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:54:52,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719011484] [2021-11-23 03:54:52,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719011484] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:52,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:52,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:54:52,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058546445] [2021-11-23 03:54:52,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:52,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:54:52,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:54:52,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:54:52,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:54:52,015 INFO L87 Difference]: Start difference. First operand 723 states and 953 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:52,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:52,324 INFO L93 Difference]: Finished difference Result 1765 states and 2386 transitions. [2021-11-23 03:54:52,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:54:52,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 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 94 [2021-11-23 03:54:52,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:52,332 INFO L225 Difference]: With dead ends: 1765 [2021-11-23 03:54:52,332 INFO L226 Difference]: Without dead ends: 1043 [2021-11-23 03:54:52,333 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 [2021-11-23 03:54:52,338 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 97 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:52,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 45 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:54:52,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2021-11-23 03:54:52,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 1043. [2021-11-23 03:54:52,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 1042 states have (on average 1.2994241842610366) internal successors, (1354), 1042 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:52,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 1354 transitions. [2021-11-23 03:54:52,381 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 1354 transitions. Word has length 94 [2021-11-23 03:54:52,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:52,382 INFO L470 AbstractCegarLoop]: Abstraction has 1043 states and 1354 transitions. [2021-11-23 03:54:52,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:52,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 1354 transitions. [2021-11-23 03:54:52,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-23 03:54:52,385 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:52,385 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:54:52,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:54:52,386 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:52,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:52,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1929388493, now seen corresponding path program 1 times [2021-11-23 03:54:52,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:52,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491180794] [2021-11-23 03:54:52,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:52,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:52,493 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-23 03:54:52,494 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:54:52,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491180794] [2021-11-23 03:54:52,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491180794] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:52,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:52,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:54:52,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949806668] [2021-11-23 03:54:52,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:52,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:54:52,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:54:52,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:54:52,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:54:52,497 INFO L87 Difference]: Start difference. First operand 1043 states and 1354 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:52,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:52,836 INFO L93 Difference]: Finished difference Result 1765 states and 2342 transitions. [2021-11-23 03:54:52,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:54:52,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-11-23 03:54:52,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:52,851 INFO L225 Difference]: With dead ends: 1765 [2021-11-23 03:54:52,851 INFO L226 Difference]: Without dead ends: 1763 [2021-11-23 03:54:52,852 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 [2021-11-23 03:54:52,854 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 54 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:52,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 9 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:54:52,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2021-11-23 03:54:52,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1203. [2021-11-23 03:54:52,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 1.3635607321131447) internal successors, (1639), 1202 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:52,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1639 transitions. [2021-11-23 03:54:52,895 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1639 transitions. Word has length 110 [2021-11-23 03:54:52,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:52,896 INFO L470 AbstractCegarLoop]: Abstraction has 1203 states and 1639 transitions. [2021-11-23 03:54:52,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:52,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1639 transitions. [2021-11-23 03:54:52,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-23 03:54:52,902 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:52,902 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:54:52,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:54:52,903 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:52,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:52,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1360787292, now seen corresponding path program 1 times [2021-11-23 03:54:52,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:52,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432961332] [2021-11-23 03:54:52,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:52,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 03:54:52,986 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:54:52,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432961332] [2021-11-23 03:54:52,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432961332] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:52,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:52,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:54:52,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285130335] [2021-11-23 03:54:52,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:52,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:54:52,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:54:52,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:54:52,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:54:52,990 INFO L87 Difference]: Start difference. First operand 1203 states and 1639 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:53,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:53,306 INFO L93 Difference]: Finished difference Result 2405 states and 3277 transitions. [2021-11-23 03:54:53,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:54:53,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 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 135 [2021-11-23 03:54:53,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:53,314 INFO L225 Difference]: With dead ends: 2405 [2021-11-23 03:54:53,314 INFO L226 Difference]: Without dead ends: 1203 [2021-11-23 03:54:53,316 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 [2021-11-23 03:54:53,317 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 79 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:53,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 19 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:54:53,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2021-11-23 03:54:53,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 1123. [2021-11-23 03:54:53,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 1122 states have (on average 1.3270944741532977) internal successors, (1489), 1122 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:53,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1489 transitions. [2021-11-23 03:54:53,351 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1489 transitions. Word has length 135 [2021-11-23 03:54:53,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:53,352 INFO L470 AbstractCegarLoop]: Abstraction has 1123 states and 1489 transitions. [2021-11-23 03:54:53,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:53,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1489 transitions. [2021-11-23 03:54:53,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-23 03:54:53,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:53,357 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-23 03:54:53,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:54:53,357 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:53,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:53,358 INFO L85 PathProgramCache]: Analyzing trace with hash -396843482, now seen corresponding path program 1 times [2021-11-23 03:54:53,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:53,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758191977] [2021-11-23 03:54:53,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:53,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:53,420 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 03:54:53,420 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:54:53,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758191977] [2021-11-23 03:54:53,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758191977] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:53,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:53,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:54:53,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890160687] [2021-11-23 03:54:53,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:53,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:54:53,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:54:53,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:54:53,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:54:53,423 INFO L87 Difference]: Start difference. First operand 1123 states and 1489 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:53,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:53,716 INFO L93 Difference]: Finished difference Result 2085 states and 2771 transitions. [2021-11-23 03:54:53,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:54:53,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 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 139 [2021-11-23 03:54:53,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:53,722 INFO L225 Difference]: With dead ends: 2085 [2021-11-23 03:54:53,722 INFO L226 Difference]: Without dead ends: 963 [2021-11-23 03:54:53,724 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 [2021-11-23 03:54:53,725 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 70 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:53,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 157 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:54:53,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-11-23 03:54:53,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 963. [2021-11-23 03:54:53,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 1.2661122661122661) internal successors, (1218), 962 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:53,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1218 transitions. [2021-11-23 03:54:53,748 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1218 transitions. Word has length 139 [2021-11-23 03:54:53,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:53,749 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 1218 transitions. [2021-11-23 03:54:53,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:53,749 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1218 transitions. [2021-11-23 03:54:53,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-23 03:54:53,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:53,753 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:54:53,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 03:54:53,753 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:53,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:53,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1420867654, now seen corresponding path program 1 times [2021-11-23 03:54:53,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:53,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398162946] [2021-11-23 03:54:53,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:53,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:53,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:53,793 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-23 03:54:53,794 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:54:53,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398162946] [2021-11-23 03:54:53,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398162946] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:53,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:53,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:54:53,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817079051] [2021-11-23 03:54:53,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:53,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:54:53,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:54:53,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:54:53,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:54:53,796 INFO L87 Difference]: Start difference. First operand 963 states and 1218 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:53,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:53,951 INFO L93 Difference]: Finished difference Result 1765 states and 2260 transitions. [2021-11-23 03:54:53,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:54:53,952 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 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 149 [2021-11-23 03:54:53,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:53,956 INFO L225 Difference]: With dead ends: 1765 [2021-11-23 03:54:53,956 INFO L226 Difference]: Without dead ends: 723 [2021-11-23 03:54:53,958 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 [2021-11-23 03:54:53,959 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 113 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:53,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 4 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:54:53,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-11-23 03:54:53,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 723. [2021-11-23 03:54:53,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 1.2229916897506925) internal successors, (883), 722 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:53,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 883 transitions. [2021-11-23 03:54:53,977 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 883 transitions. Word has length 149 [2021-11-23 03:54:53,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:53,977 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 883 transitions. [2021-11-23 03:54:53,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:53,977 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 883 transitions. [2021-11-23 03:54:53,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-23 03:54:53,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:53,981 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 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] [2021-11-23 03:54:53,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 03:54:53,981 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:53,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:53,982 INFO L85 PathProgramCache]: Analyzing trace with hash 472512044, now seen corresponding path program 1 times [2021-11-23 03:54:53,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:53,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552565288] [2021-11-23 03:54:53,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:53,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:54,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:54,043 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-23 03:54:54,043 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:54:54,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552565288] [2021-11-23 03:54:54,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552565288] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:54,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:54,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:54:54,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257412635] [2021-11-23 03:54:54,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:54,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:54:54,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:54:54,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:54:54,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:54:54,046 INFO L87 Difference]: Start difference. First operand 723 states and 883 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:54,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:54,323 INFO L93 Difference]: Finished difference Result 1605 states and 2004 transitions. [2021-11-23 03:54:54,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:54:54,323 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 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 178 [2021-11-23 03:54:54,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:54,329 INFO L225 Difference]: With dead ends: 1605 [2021-11-23 03:54:54,329 INFO L226 Difference]: Without dead ends: 963 [2021-11-23 03:54:54,330 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 [2021-11-23 03:54:54,331 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 61 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:54,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 110 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:54:54,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-11-23 03:54:54,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 963. [2021-11-23 03:54:54,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 1.2162162162162162) internal successors, (1170), 962 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:54,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1170 transitions. [2021-11-23 03:54:54,353 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1170 transitions. Word has length 178 [2021-11-23 03:54:54,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:54,354 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 1170 transitions. [2021-11-23 03:54:54,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:54,354 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1170 transitions. [2021-11-23 03:54:54,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-23 03:54:54,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:54,358 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 03:54:54,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 03:54:54,358 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:54,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:54,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1447470293, now seen corresponding path program 1 times [2021-11-23 03:54:54,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:54,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127287086] [2021-11-23 03:54:54,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:54,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:54,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:54,511 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 68 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:54,512 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:54:54,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127287086] [2021-11-23 03:54:54,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127287086] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:54:54,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911900956] [2021-11-23 03:54:54,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:54,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:54:54,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d53d23-862f-47da-bddd-44b3fea4a446/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:54:54,518 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d53d23-862f-47da-bddd-44b3fea4a446/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:54:54,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d53d23-862f-47da-bddd-44b3fea4a446/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:54:54,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:54,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:54:54,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:54:54,989 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-23 03:54:54,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:54:54,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911900956] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:54,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:54:54,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-23 03:54:54,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764294495] [2021-11-23 03:54:54,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:54,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:54:54,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:54:54,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:54:54,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:54:54,992 INFO L87 Difference]: Start difference. First operand 963 states and 1170 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:55,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:55,286 INFO L93 Difference]: Finished difference Result 2165 states and 2686 transitions. [2021-11-23 03:54:55,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:54:55,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 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 178 [2021-11-23 03:54:55,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:55,293 INFO L225 Difference]: With dead ends: 2165 [2021-11-23 03:54:55,294 INFO L226 Difference]: Without dead ends: 1283 [2021-11-23 03:54:55,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:54:55,296 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:55,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 132 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:54:55,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2021-11-23 03:54:55,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 1203. [2021-11-23 03:54:55,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 1.204658901830283) internal successors, (1448), 1202 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:55,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1448 transitions. [2021-11-23 03:54:55,326 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1448 transitions. Word has length 178 [2021-11-23 03:54:55,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:55,326 INFO L470 AbstractCegarLoop]: Abstraction has 1203 states and 1448 transitions. [2021-11-23 03:54:55,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:55,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1448 transitions. [2021-11-23 03:54:55,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-23 03:54:55,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:55,331 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:54:55,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d53d23-862f-47da-bddd-44b3fea4a446/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:54:55,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d53d23-862f-47da-bddd-44b3fea4a446/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:54:55,558 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:55,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:55,558 INFO L85 PathProgramCache]: Analyzing trace with hash -57926641, now seen corresponding path program 1 times [2021-11-23 03:54:55,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:55,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981169464] [2021-11-23 03:54:55,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:55,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:55,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:55,634 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-23 03:54:55,635 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:54:55,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981169464] [2021-11-23 03:54:55,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981169464] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:55,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:55,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:54:55,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478008789] [2021-11-23 03:54:55,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:55,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:54:55,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:54:55,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:54:55,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:54:55,638 INFO L87 Difference]: Start difference. First operand 1203 states and 1448 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:55,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:55,886 INFO L93 Difference]: Finished difference Result 2485 states and 2988 transitions. [2021-11-23 03:54:55,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:54:55,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 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 191 [2021-11-23 03:54:55,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:55,896 INFO L225 Difference]: With dead ends: 2485 [2021-11-23 03:54:55,896 INFO L226 Difference]: Without dead ends: 963 [2021-11-23 03:54:55,898 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 [2021-11-23 03:54:55,899 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 35 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:55,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 132 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:54:55,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-11-23 03:54:55,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 963. [2021-11-23 03:54:55,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 1.104989604989605) internal successors, (1063), 962 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:55,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1063 transitions. [2021-11-23 03:54:55,924 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1063 transitions. Word has length 191 [2021-11-23 03:54:55,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:55,925 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 1063 transitions. [2021-11-23 03:54:55,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:55,925 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1063 transitions. [2021-11-23 03:54:55,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-11-23 03:54:55,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:55,930 INFO L514 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:54:55,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 03:54:55,931 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:55,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:55,932 INFO L85 PathProgramCache]: Analyzing trace with hash 96896167, now seen corresponding path program 1 times [2021-11-23 03:54:55,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:55,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780140137] [2021-11-23 03:54:55,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:55,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:55,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:56,063 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 348 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-23 03:54:56,064 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:54:56,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780140137] [2021-11-23 03:54:56,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780140137] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:56,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:56,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:54:56,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108038520] [2021-11-23 03:54:56,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:56,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:54:56,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:54:56,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:54:56,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:54:56,067 INFO L87 Difference]: Start difference. First operand 963 states and 1063 transitions. Second operand has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:56,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:56,434 INFO L93 Difference]: Finished difference Result 1845 states and 2042 transitions. [2021-11-23 03:54:56,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:54:56,434 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 249 [2021-11-23 03:54:56,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:56,441 INFO L225 Difference]: With dead ends: 1845 [2021-11-23 03:54:56,441 INFO L226 Difference]: Without dead ends: 963 [2021-11-23 03:54:56,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:54:56,443 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 89 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:56,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 126 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:54:56,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-11-23 03:54:56,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 963. [2021-11-23 03:54:56,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 1.0956340956340955) internal successors, (1054), 962 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:56,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1054 transitions. [2021-11-23 03:54:56,490 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1054 transitions. Word has length 249 [2021-11-23 03:54:56,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:56,490 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 1054 transitions. [2021-11-23 03:54:56,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:56,491 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1054 transitions. [2021-11-23 03:54:56,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-23 03:54:56,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:56,495 INFO L514 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:54:56,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 03:54:56,496 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:56,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:56,496 INFO L85 PathProgramCache]: Analyzing trace with hash 2019579956, now seen corresponding path program 1 times [2021-11-23 03:54:56,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:56,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708383233] [2021-11-23 03:54:56,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:56,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:56,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:56,605 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 338 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-11-23 03:54:56,605 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:54:56,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708383233] [2021-11-23 03:54:56,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708383233] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:56,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:56,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:54:56,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647469911] [2021-11-23 03:54:56,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:56,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:54:56,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:54:56,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:54:56,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:54:56,609 INFO L87 Difference]: Start difference. First operand 963 states and 1054 transitions. Second operand has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:56,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:56,908 INFO L93 Difference]: Finished difference Result 1845 states and 2024 transitions. [2021-11-23 03:54:56,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:54:56,909 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 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 262 [2021-11-23 03:54:56,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:56,914 INFO L225 Difference]: With dead ends: 1845 [2021-11-23 03:54:56,914 INFO L226 Difference]: Without dead ends: 963 [2021-11-23 03:54:56,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:54:56,917 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 182 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:56,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 115 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:54:56,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-11-23 03:54:56,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 883. [2021-11-23 03:54:56,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 882 states have (on average 1.09297052154195) internal successors, (964), 882 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:56,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 964 transitions. [2021-11-23 03:54:56,941 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 964 transitions. Word has length 262 [2021-11-23 03:54:56,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:56,941 INFO L470 AbstractCegarLoop]: Abstraction has 883 states and 964 transitions. [2021-11-23 03:54:56,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:56,941 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 964 transitions. [2021-11-23 03:54:56,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-11-23 03:54:56,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:56,947 INFO L514 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:54:56,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 03:54:56,947 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:56,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:56,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1593361058, now seen corresponding path program 1 times [2021-11-23 03:54:56,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:56,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399169475] [2021-11-23 03:54:56,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:56,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:56,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 273 proven. 94 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-23 03:54:57,172 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:54:57,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399169475] [2021-11-23 03:54:57,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399169475] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:54:57,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779063097] [2021-11-23 03:54:57,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:57,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:54:57,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d53d23-862f-47da-bddd-44b3fea4a446/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:54:57,178 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d53d23-862f-47da-bddd-44b3fea4a446/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:54:57,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d53d23-862f-47da-bddd-44b3fea4a446/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:54:57,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:57,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:54:57,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:54:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 290 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-23 03:54:57,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:54:57,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779063097] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:57,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:54:57,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-23 03:54:57,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897645836] [2021-11-23 03:54:57,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:57,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:54:57,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:54:57,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:54:57,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:54:57,829 INFO L87 Difference]: Start difference. First operand 883 states and 964 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:58,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:58,055 INFO L93 Difference]: Finished difference Result 1925 states and 2117 transitions. [2021-11-23 03:54:58,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:54:58,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 284 [2021-11-23 03:54:58,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:58,062 INFO L225 Difference]: With dead ends: 1925 [2021-11-23 03:54:58,062 INFO L226 Difference]: Without dead ends: 1043 [2021-11-23 03:54:58,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:54:58,066 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 55 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:58,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 31 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:54:58,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2021-11-23 03:54:58,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 1043. [2021-11-23 03:54:58,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 1042 states have (on average 1.0681381957773513) internal successors, (1113), 1042 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:58,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 1113 transitions. [2021-11-23 03:54:58,095 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 1113 transitions. Word has length 284 [2021-11-23 03:54:58,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:58,096 INFO L470 AbstractCegarLoop]: Abstraction has 1043 states and 1113 transitions. [2021-11-23 03:54:58,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:58,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 1113 transitions. [2021-11-23 03:54:58,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-11-23 03:54:58,102 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:58,102 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 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, 2, 2, 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] [2021-11-23 03:54:58,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d53d23-862f-47da-bddd-44b3fea4a446/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:54:58,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d53d23-862f-47da-bddd-44b3fea4a446/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-23 03:54:58,319 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:58,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:58,319 INFO L85 PathProgramCache]: Analyzing trace with hash 258659762, now seen corresponding path program 1 times [2021-11-23 03:54:58,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:58,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924925760] [2021-11-23 03:54:58,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:58,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:58,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:58,434 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 330 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-11-23 03:54:58,435 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:54:58,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924925760] [2021-11-23 03:54:58,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924925760] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:58,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:58,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:54:58,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676594549] [2021-11-23 03:54:58,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:58,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:54:58,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:54:58,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:54:58,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:54:58,437 INFO L87 Difference]: Start difference. First operand 1043 states and 1113 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:58,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:58,658 INFO L93 Difference]: Finished difference Result 1763 states and 1882 transitions. [2021-11-23 03:54:58,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:54:58,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 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 304 [2021-11-23 03:54:58,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:58,659 INFO L225 Difference]: With dead ends: 1763 [2021-11-23 03:54:58,659 INFO L226 Difference]: Without dead ends: 0 [2021-11-23 03:54:58,661 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 [2021-11-23 03:54:58,662 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 60 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:58,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 11 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:54:58,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-23 03:54:58,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-23 03:54:58,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:58,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-23 03:54:58,663 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 304 [2021-11-23 03:54:58,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:58,663 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-23 03:54:58,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:58,663 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-23 03:54:58,664 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-23 03:54:58,666 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 03:54:58,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 03:54:58,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-23 03:54:59,380 INFO L858 garLoopResultBuilder]: For program point L301(lines 301 423) no Hoare annotation was computed. [2021-11-23 03:54:59,380 INFO L858 garLoopResultBuilder]: For program point L235(lines 235 423) no Hoare annotation was computed. [2021-11-23 03:54:59,380 INFO L858 garLoopResultBuilder]: For program point L169(lines 169 423) no Hoare annotation was computed. [2021-11-23 03:54:59,380 INFO L858 garLoopResultBuilder]: For program point L303(lines 303 423) no Hoare annotation was computed. [2021-11-23 03:54:59,380 INFO L858 garLoopResultBuilder]: For program point L105(lines 105 423) no Hoare annotation was computed. [2021-11-23 03:54:59,381 INFO L858 garLoopResultBuilder]: For program point L40(lines 40 423) no Hoare annotation was computed. [2021-11-23 03:54:59,381 INFO L858 garLoopResultBuilder]: For program point L371(lines 371 423) no Hoare annotation was computed. [2021-11-23 03:54:59,381 INFO L858 garLoopResultBuilder]: For program point L307(lines 307 423) no Hoare annotation was computed. [2021-11-23 03:54:59,381 INFO L858 garLoopResultBuilder]: For program point L175(lines 175 423) no Hoare annotation was computed. [2021-11-23 03:54:59,381 INFO L858 garLoopResultBuilder]: For program point L109(lines 109 423) no Hoare annotation was computed. [2021-11-23 03:54:59,381 INFO L858 garLoopResultBuilder]: For program point L242(lines 242 423) no Hoare annotation was computed. [2021-11-23 03:54:59,381 INFO L858 garLoopResultBuilder]: For program point L45(lines 45 423) no Hoare annotation was computed. [2021-11-23 03:54:59,381 INFO L858 garLoopResultBuilder]: For program point L244(lines 244 423) no Hoare annotation was computed. [2021-11-23 03:54:59,381 INFO L858 garLoopResultBuilder]: For program point L179(lines 179 423) no Hoare annotation was computed. [2021-11-23 03:54:59,381 INFO L858 garLoopResultBuilder]: For program point L378(lines 378 423) no Hoare annotation was computed. [2021-11-23 03:54:59,381 INFO L858 garLoopResultBuilder]: For program point L48(lines 48 423) no Hoare annotation was computed. [2021-11-23 03:54:59,382 INFO L858 garLoopResultBuilder]: For program point L577-1(lines 39 608) no Hoare annotation was computed. [2021-11-23 03:54:59,382 INFO L858 garLoopResultBuilder]: For program point L247(lines 247 423) no Hoare annotation was computed. [2021-11-23 03:54:59,382 INFO L858 garLoopResultBuilder]: For program point L116(lines 116 423) no Hoare annotation was computed. [2021-11-23 03:54:59,382 INFO L858 garLoopResultBuilder]: For program point L580-1(lines 39 608) no Hoare annotation was computed. [2021-11-23 03:54:59,382 INFO L858 garLoopResultBuilder]: For program point L52(lines 52 423) no Hoare annotation was computed. [2021-11-23 03:54:59,382 INFO L858 garLoopResultBuilder]: For program point L581(line 581) no Hoare annotation was computed. [2021-11-23 03:54:59,382 INFO L858 garLoopResultBuilder]: For program point L185(lines 185 423) no Hoare annotation was computed. [2021-11-23 03:54:59,382 INFO L858 garLoopResultBuilder]: For program point L385(lines 385 423) no Hoare annotation was computed. [2021-11-23 03:54:59,382 INFO L858 garLoopResultBuilder]: For program point L319(lines 319 423) no Hoare annotation was computed. [2021-11-23 03:54:59,382 INFO L858 garLoopResultBuilder]: For program point L189(lines 189 423) no Hoare annotation was computed. [2021-11-23 03:54:59,383 INFO L858 garLoopResultBuilder]: For program point L123(lines 123 423) no Hoare annotation was computed. [2021-11-23 03:54:59,383 INFO L858 garLoopResultBuilder]: For program point L57(lines 57 423) no Hoare annotation was computed. [2021-11-23 03:54:59,383 INFO L858 garLoopResultBuilder]: For program point L388(lines 388 423) no Hoare annotation was computed. [2021-11-23 03:54:59,383 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-23 03:54:59,383 INFO L858 garLoopResultBuilder]: For program point L390(lines 390 423) no Hoare annotation was computed. [2021-11-23 03:54:59,383 INFO L858 garLoopResultBuilder]: For program point L324(lines 324 423) no Hoare annotation was computed. [2021-11-23 03:54:59,383 INFO L858 garLoopResultBuilder]: For program point L258(lines 258 423) no Hoare annotation was computed. [2021-11-23 03:54:59,383 INFO L858 garLoopResultBuilder]: For program point L60(lines 60 423) no Hoare annotation was computed. [2021-11-23 03:54:59,383 INFO L858 garLoopResultBuilder]: For program point L195(lines 195 423) no Hoare annotation was computed. [2021-11-23 03:54:59,383 INFO L858 garLoopResultBuilder]: For program point L129(lines 129 423) no Hoare annotation was computed. [2021-11-23 03:54:59,383 INFO L858 garLoopResultBuilder]: For program point L64(lines 64 423) no Hoare annotation was computed. [2021-11-23 03:54:59,383 INFO L858 garLoopResultBuilder]: For program point L263(lines 263 423) no Hoare annotation was computed. [2021-11-23 03:54:59,384 INFO L858 garLoopResultBuilder]: For program point L197(lines 197 423) no Hoare annotation was computed. [2021-11-23 03:54:59,384 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 581) no Hoare annotation was computed. [2021-11-23 03:54:59,384 INFO L858 garLoopResultBuilder]: For program point L199(lines 199 423) no Hoare annotation was computed. [2021-11-23 03:54:59,384 INFO L858 garLoopResultBuilder]: For program point L133(lines 133 423) no Hoare annotation was computed. [2021-11-23 03:54:59,384 INFO L858 garLoopResultBuilder]: For program point L399(lines 399 423) no Hoare annotation was computed. [2021-11-23 03:54:59,384 INFO L858 garLoopResultBuilder]: For program point L201(lines 201 423) no Hoare annotation was computed. [2021-11-23 03:54:59,384 INFO L858 garLoopResultBuilder]: For program point L69(lines 69 423) no Hoare annotation was computed. [2021-11-23 03:54:59,384 INFO L858 garLoopResultBuilder]: For program point L269(lines 269 423) no Hoare annotation was computed. [2021-11-23 03:54:59,384 INFO L858 garLoopResultBuilder]: For program point L204(lines 204 423) no Hoare annotation was computed. [2021-11-23 03:54:59,384 INFO L858 garLoopResultBuilder]: For program point L271(lines 271 423) no Hoare annotation was computed. [2021-11-23 03:54:59,385 INFO L858 garLoopResultBuilder]: For program point L404(lines 404 423) no Hoare annotation was computed. [2021-11-23 03:54:59,385 INFO L858 garLoopResultBuilder]: For program point L338(lines 338 423) no Hoare annotation was computed. [2021-11-23 03:54:59,385 INFO L858 garLoopResultBuilder]: For program point L140(lines 140 423) no Hoare annotation was computed. [2021-11-23 03:54:59,385 INFO L858 garLoopResultBuilder]: For program point L75(lines 75 423) no Hoare annotation was computed. [2021-11-23 03:54:59,385 INFO L858 garLoopResultBuilder]: For program point L208(lines 208 423) no Hoare annotation was computed. [2021-11-23 03:54:59,385 INFO L858 garLoopResultBuilder]: For program point L341(lines 341 423) no Hoare annotation was computed. [2021-11-23 03:54:59,385 INFO L858 garLoopResultBuilder]: For program point L408(lines 408 423) no Hoare annotation was computed. [2021-11-23 03:54:59,385 INFO L858 garLoopResultBuilder]: For program point L144(lines 144 423) no Hoare annotation was computed. [2021-11-23 03:54:59,385 INFO L854 garLoopResultBuilder]: At program point L607(lines 39 608) the Hoare annotation is: (let ((.cse6 (= ~a25~0 0)) (.cse3 (<= ~a28~0 7)) (.cse0 (= ~a25~0 1)) (.cse8 (<= ~a17~0 7)) (.cse9 (<= ~a19~0 0)) (.cse7 (<= 10 ~a28~0)) (.cse1 (<= 8 ~a17~0)) (.cse2 (<= ~a17~0 8)) (.cse5 (<= ~a28~0 10)) (.cse4 (= ~a19~0 1))) (or (and .cse0 .cse1 .cse2 .cse3) (and .cse0 .cse1 .cse2 .cse4) (and (<= 11 ~a28~0) .cse0 .cse2 .cse4) (and .cse2 .cse5 .cse4 .cse6) (and .cse7 .cse8 .cse5 .cse6 .cse9) (and (<= ~a28~0 8) .cse2 .cse6) (and (= ~a25~0 ~a11~0) .cse0 .cse2 .cse4 .cse3) (and .cse7 .cse0 .cse1 .cse2 .cse5) (and (<= 9 ~a28~0) .cse0 .cse8 .cse5 .cse9) (and .cse7 .cse1 .cse2 .cse5 .cse4))) [2021-11-23 03:54:59,386 INFO L858 garLoopResultBuilder]: For program point L79(lines 79 423) no Hoare annotation was computed. [2021-11-23 03:54:59,386 INFO L858 garLoopResultBuilder]: For program point L212(lines 212 423) no Hoare annotation was computed. [2021-11-23 03:54:59,386 INFO L861 garLoopResultBuilder]: At program point L610(lines 610 627) the Hoare annotation is: true [2021-11-23 03:54:59,386 INFO L858 garLoopResultBuilder]: For program point L412(lines 412 423) no Hoare annotation was computed. [2021-11-23 03:54:59,386 INFO L858 garLoopResultBuilder]: For program point L347(lines 347 423) no Hoare annotation was computed. [2021-11-23 03:54:59,386 INFO L858 garLoopResultBuilder]: For program point L149(lines 149 423) no Hoare annotation was computed. [2021-11-23 03:54:59,386 INFO L858 garLoopResultBuilder]: For program point L414(lines 414 423) no Hoare annotation was computed. [2021-11-23 03:54:59,386 INFO L858 garLoopResultBuilder]: For program point L84(lines 84 423) no Hoare annotation was computed. [2021-11-23 03:54:59,386 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-23 03:54:59,386 INFO L858 garLoopResultBuilder]: For program point L417(lines 417 423) no Hoare annotation was computed. [2021-11-23 03:54:59,386 INFO L858 garLoopResultBuilder]: For program point L153(lines 153 423) no Hoare annotation was computed. [2021-11-23 03:54:59,387 INFO L854 garLoopResultBuilder]: At program point L616-2(lines 616 626) the Hoare annotation is: (let ((.cse6 (= ~a25~0 0)) (.cse3 (<= ~a28~0 7)) (.cse0 (= ~a25~0 1)) (.cse8 (<= ~a17~0 7)) (.cse9 (<= ~a19~0 0)) (.cse7 (<= 10 ~a28~0)) (.cse1 (<= 8 ~a17~0)) (.cse2 (<= ~a17~0 8)) (.cse5 (<= ~a28~0 10)) (.cse4 (= ~a19~0 1))) (or (and .cse0 .cse1 .cse2 .cse3) (and .cse0 .cse1 .cse2 .cse4) (and (<= 11 ~a28~0) .cse0 .cse2 .cse4) (and .cse2 .cse5 .cse4 .cse6) (and .cse7 .cse8 .cse5 .cse6 .cse9) (and (<= ~a28~0 8) .cse2 .cse6) (and (= ~a25~0 ~a11~0) .cse0 .cse2 .cse4 .cse3) (and .cse7 .cse0 .cse1 .cse2 .cse5) (and (<= 9 ~a28~0) .cse0 .cse8 .cse5 .cse9) (and .cse7 .cse1 .cse2 .cse5 .cse4))) [2021-11-23 03:54:59,387 INFO L858 garLoopResultBuilder]: For program point L286(lines 286 423) no Hoare annotation was computed. [2021-11-23 03:54:59,387 INFO L858 garLoopResultBuilder]: For program point L419(lines 419 423) no Hoare annotation was computed. [2021-11-23 03:54:59,387 INFO L858 garLoopResultBuilder]: For program point L222(lines 222 423) no Hoare annotation was computed. [2021-11-23 03:54:59,387 INFO L858 garLoopResultBuilder]: For program point L290(lines 290 423) no Hoare annotation was computed. [2021-11-23 03:54:59,387 INFO L858 garLoopResultBuilder]: For program point L158(lines 158 423) no Hoare annotation was computed. [2021-11-23 03:54:59,387 INFO L858 garLoopResultBuilder]: For program point L92(lines 92 423) no Hoare annotation was computed. [2021-11-23 03:54:59,387 INFO L858 garLoopResultBuilder]: For program point L621(line 621) no Hoare annotation was computed. [2021-11-23 03:54:59,387 INFO L858 garLoopResultBuilder]: For program point L225(lines 225 423) no Hoare annotation was computed. [2021-11-23 03:54:59,387 INFO L858 garLoopResultBuilder]: For program point L359(lines 359 423) no Hoare annotation was computed. [2021-11-23 03:54:59,388 INFO L858 garLoopResultBuilder]: For program point L293(lines 293 423) no Hoare annotation was computed. [2021-11-23 03:54:59,388 INFO L858 garLoopResultBuilder]: For program point L228(lines 228 423) no Hoare annotation was computed. [2021-11-23 03:54:59,388 INFO L858 garLoopResultBuilder]: For program point L296(lines 296 423) no Hoare annotation was computed. [2021-11-23 03:54:59,388 INFO L858 garLoopResultBuilder]: For program point L164(lines 164 423) no Hoare annotation was computed. [2021-11-23 03:54:59,388 INFO L858 garLoopResultBuilder]: For program point L364(lines 364 423) no Hoare annotation was computed. [2021-11-23 03:54:59,388 INFO L858 garLoopResultBuilder]: For program point L233(lines 233 423) no Hoare annotation was computed. [2021-11-23 03:54:59,388 INFO L858 garLoopResultBuilder]: For program point L101(lines 101 423) no Hoare annotation was computed. [2021-11-23 03:54:59,396 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:54:59,399 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 03:54:59,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:54:59 BoogieIcfgContainer [2021-11-23 03:54:59,425 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 03:54:59,426 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 03:54:59,426 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 03:54:59,426 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 03:54:59,427 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:54:49" (3/4) ... [2021-11-23 03:54:59,429 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-23 03:54:59,453 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 116 nodes and edges [2021-11-23 03:54:59,455 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 22 nodes and edges [2021-11-23 03:54:59,456 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-11-23 03:54:59,458 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-23 03:54:59,573 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d53d23-862f-47da-bddd-44b3fea4a446/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 03:54:59,573 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 03:54:59,574 INFO L158 Benchmark]: Toolchain (without parser) took 12297.33ms. Allocated memory was 111.1MB in the beginning and 201.3MB in the end (delta: 90.2MB). Free memory was 73.3MB in the beginning and 97.8MB in the end (delta: -24.5MB). Peak memory consumption was 64.5MB. Max. memory is 16.1GB. [2021-11-23 03:54:59,574 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 111.1MB. Free memory was 82.2MB in the beginning and 82.1MB in the end (delta: 21.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:54:59,574 INFO L158 Benchmark]: CACSL2BoogieTranslator took 547.75ms. Allocated memory is still 111.1MB. Free memory was 73.1MB in the beginning and 68.9MB in the end (delta: 4.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 03:54:59,575 INFO L158 Benchmark]: Boogie Procedure Inliner took 85.89ms. Allocated memory is still 111.1MB. Free memory was 68.9MB in the beginning and 63.7MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 03:54:59,575 INFO L158 Benchmark]: Boogie Preprocessor took 112.81ms. Allocated memory is still 111.1MB. Free memory was 63.7MB in the beginning and 59.5MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 03:54:59,575 INFO L158 Benchmark]: RCFGBuilder took 1340.21ms. Allocated memory was 111.1MB in the beginning and 167.8MB in the end (delta: 56.6MB). Free memory was 59.0MB in the beginning and 80.6MB in the end (delta: -21.7MB). Peak memory consumption was 41.8MB. Max. memory is 16.1GB. [2021-11-23 03:54:59,576 INFO L158 Benchmark]: TraceAbstraction took 10054.98ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 80.6MB in the beginning and 113.6MB in the end (delta: -32.9MB). Peak memory consumption was 65.0MB. Max. memory is 16.1GB. [2021-11-23 03:54:59,576 INFO L158 Benchmark]: Witness Printer took 147.06ms. Allocated memory is still 201.3MB. Free memory was 112.5MB in the beginning and 97.8MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-23 03:54:59,578 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 111.1MB. Free memory was 82.2MB in the beginning and 82.1MB in the end (delta: 21.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 547.75ms. Allocated memory is still 111.1MB. Free memory was 73.1MB in the beginning and 68.9MB in the end (delta: 4.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 85.89ms. Allocated memory is still 111.1MB. Free memory was 68.9MB in the beginning and 63.7MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 112.81ms. Allocated memory is still 111.1MB. Free memory was 63.7MB in the beginning and 59.5MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1340.21ms. Allocated memory was 111.1MB in the beginning and 167.8MB in the end (delta: 56.6MB). Free memory was 59.0MB in the beginning and 80.6MB in the end (delta: -21.7MB). Peak memory consumption was 41.8MB. Max. memory is 16.1GB. * TraceAbstraction took 10054.98ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 80.6MB in the beginning and 113.6MB in the end (delta: -32.9MB). Peak memory consumption was 65.0MB. Max. memory is 16.1GB. * Witness Printer took 147.06ms. Allocated memory is still 201.3MB. Free memory was 112.5MB in the beginning and 97.8MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 581]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 85 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 10.0s, OverallIterations: 16, TraceHistogramMax: 7, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 5.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1083 SdHoareTripleChecker+Valid, 4.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1083 mSDsluCounter, 1295 SdHoareTripleChecker+Invalid, 3.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 103 mSDsCounter, 737 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3806 IncrementalHoareTripleChecker+Invalid, 4543 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 737 mSolverCounterUnsat, 1193 mSDtfsCounter, 3806 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 508 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1203occurred in iteration=6, InterpolantAutomatonStates: 50, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 16 MinimizatonAttempts, 800 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 39 NumberOfFragments, 287 HoareAnnotationTreeSize, 3 FomulaSimplifications, 276 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 620 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 3077 NumberOfCodeBlocks, 3077 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 3059 ConstructedInterpolants, 0 QuantifiedInterpolants, 8601 SizeOfPredicates, 0 NumberOfNonLiveVariables, 905 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 18 InterpolantComputations, 16 PerfectInterpolantSequences, 3272/3424 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 616]: Loop Invariant Derived loop invariant: (((((((((((a25 == 1 && 8 <= a17) && a17 <= 8) && a28 <= 7) || (((a25 == 1 && 8 <= a17) && a17 <= 8) && a19 == 1)) || (((11 <= a28 && a25 == 1) && a17 <= 8) && a19 == 1)) || (((a17 <= 8 && a28 <= 10) && a19 == 1) && a25 == 0)) || ((((10 <= a28 && a17 <= 7) && a28 <= 10) && a25 == 0) && a19 <= 0)) || ((a28 <= 8 && a17 <= 8) && a25 == 0)) || ((((a25 == a11 && a25 == 1) && a17 <= 8) && a19 == 1) && a28 <= 7)) || ((((10 <= a28 && a25 == 1) && 8 <= a17) && a17 <= 8) && a28 <= 10)) || ((((9 <= a28 && a25 == 1) && a17 <= 7) && a28 <= 10) && a19 <= 0)) || ((((10 <= a28 && 8 <= a17) && a17 <= 8) && a28 <= 10) && a19 == 1) - InvariantResult [Line: 610]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: (((((((((((a25 == 1 && 8 <= a17) && a17 <= 8) && a28 <= 7) || (((a25 == 1 && 8 <= a17) && a17 <= 8) && a19 == 1)) || (((11 <= a28 && a25 == 1) && a17 <= 8) && a19 == 1)) || (((a17 <= 8 && a28 <= 10) && a19 == 1) && a25 == 0)) || ((((10 <= a28 && a17 <= 7) && a28 <= 10) && a25 == 0) && a19 <= 0)) || ((a28 <= 8 && a17 <= 8) && a25 == 0)) || ((((a25 == a11 && a25 == 1) && a17 <= 8) && a19 == 1) && a28 <= 7)) || ((((10 <= a28 && a25 == 1) && 8 <= a17) && a17 <= 8) && a28 <= 10)) || ((((9 <= a28 && a25 == 1) && a17 <= 7) && a28 <= 10) && a19 <= 0)) || ((((10 <= a28 && 8 <= a17) && a17 <= 8) && a28 <= 10) && a19 == 1) RESULT: Ultimate proved your program to be correct! [2021-11-23 03:54:59,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1d53d23-862f-47da-bddd-44b3fea4a446/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE