./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl-simplified/s3_clnt_1.cil-1.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_f052b186-9d59-4d6a-9d63-ad97a0341118/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f052b186-9d59-4d6a-9d63-ad97a0341118/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_f052b186-9d59-4d6a-9d63-ad97a0341118/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f052b186-9d59-4d6a-9d63-ad97a0341118/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl-simplified/s3_clnt_1.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f052b186-9d59-4d6a-9d63-ad97a0341118/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_f052b186-9d59-4d6a-9d63-ad97a0341118/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 9d22078cc0ed1f6555ed02c6ceb2e5694208de3c10c4e0f5a14ad82c4e25bb79 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:02:29,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:02:29,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:02:29,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:02:29,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:02:29,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:02:29,791 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:02:29,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:02:29,798 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:02:29,804 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:02:29,805 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:02:29,807 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:02:29,807 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:02:29,810 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:02:29,812 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:02:29,817 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:02:29,819 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:02:29,820 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:02:29,823 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:02:29,831 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:02:29,833 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:02:29,835 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:02:29,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:02:29,838 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:02:29,841 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:02:29,841 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:02:29,841 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:02:29,842 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:02:29,843 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:02:29,844 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:02:29,844 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:02:29,845 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:02:29,846 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:02:29,847 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:02:29,849 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:02:29,849 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:02:29,850 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:02:29,851 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:02:29,851 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:02:29,852 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:02:29,853 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:02:29,854 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f052b186-9d59-4d6a-9d63-ad97a0341118/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:02:29,896 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:02:29,896 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:02:29,897 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:02:29,897 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:02:29,904 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:02:29,905 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:02:29,905 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:02:29,906 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:02:29,906 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:02:29,906 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:02:29,907 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:02:29,908 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:02:29,908 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:02:29,908 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:02:29,908 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:02:29,909 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:02:29,909 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:02:29,909 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:02:29,910 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:02:29,910 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:02:29,910 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:02:29,911 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:02:29,911 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:02:29,911 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:02:29,911 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:02:29,912 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:02:29,912 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:02:29,912 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:02:29,912 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:02:29,913 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:02:29,913 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:02:29,913 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:02:29,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:02:29,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:02:29,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:02:29,914 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:02:29,915 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:02:29,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:02:29,915 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:02:29,915 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:02:29,916 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:02:29,916 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_f052b186-9d59-4d6a-9d63-ad97a0341118/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f052b186-9d59-4d6a-9d63-ad97a0341118/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9d22078cc0ed1f6555ed02c6ceb2e5694208de3c10c4e0f5a14ad82c4e25bb79 [2021-11-23 02:02:30,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:02:30,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:02:30,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:02:30,273 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:02:30,274 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:02:30,275 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f052b186-9d59-4d6a-9d63-ad97a0341118/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/openssl-simplified/s3_clnt_1.cil-1.c [2021-11-23 02:02:30,354 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f052b186-9d59-4d6a-9d63-ad97a0341118/bin/utaipan-EQgc7hIp5V/data/53cef4ef5/e57d9e8ec08a47d4a67ed12eb919208d/FLAGe0eb225e6 [2021-11-23 02:02:30,924 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:02:30,937 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f052b186-9d59-4d6a-9d63-ad97a0341118/sv-benchmarks/c/openssl-simplified/s3_clnt_1.cil-1.c [2021-11-23 02:02:30,956 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f052b186-9d59-4d6a-9d63-ad97a0341118/bin/utaipan-EQgc7hIp5V/data/53cef4ef5/e57d9e8ec08a47d4a67ed12eb919208d/FLAGe0eb225e6 [2021-11-23 02:02:31,239 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f052b186-9d59-4d6a-9d63-ad97a0341118/bin/utaipan-EQgc7hIp5V/data/53cef4ef5/e57d9e8ec08a47d4a67ed12eb919208d [2021-11-23 02:02:31,241 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:02:31,243 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:02:31,251 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:02:31,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:02:31,255 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:02:31,256 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:02:31" (1/1) ... [2021-11-23 02:02:31,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b02e1ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:31, skipping insertion in model container [2021-11-23 02:02:31,258 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:02:31" (1/1) ... [2021-11-23 02:02:31,265 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:02:31,322 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:02:31,620 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_f052b186-9d59-4d6a-9d63-ad97a0341118/sv-benchmarks/c/openssl-simplified/s3_clnt_1.cil-1.c[35497,35510] [2021-11-23 02:02:31,640 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:02:31,656 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:02:31,745 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_f052b186-9d59-4d6a-9d63-ad97a0341118/sv-benchmarks/c/openssl-simplified/s3_clnt_1.cil-1.c[35497,35510] [2021-11-23 02:02:31,752 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:02:31,766 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:02:31,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:31 WrapperNode [2021-11-23 02:02:31,767 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:02:31,769 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:02:31,769 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:02:31,770 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:02:31,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:31" (1/1) ... [2021-11-23 02:02:31,800 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:31" (1/1) ... [2021-11-23 02:02:31,854 INFO L137 Inliner]: procedures = 15, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 506 [2021-11-23 02:02:31,856 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:02:31,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:02:31,857 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:02:31,858 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:02:31,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:31" (1/1) ... [2021-11-23 02:02:31,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:31" (1/1) ... [2021-11-23 02:02:31,884 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:31" (1/1) ... [2021-11-23 02:02:31,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:31" (1/1) ... [2021-11-23 02:02:31,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:31" (1/1) ... [2021-11-23 02:02:31,913 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:31" (1/1) ... [2021-11-23 02:02:31,915 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:31" (1/1) ... [2021-11-23 02:02:31,930 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:02:31,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:02:31,931 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:02:31,931 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:02:31,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:31" (1/1) ... [2021-11-23 02:02:31,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:02:31,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f052b186-9d59-4d6a-9d63-ad97a0341118/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:02:31,966 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f052b186-9d59-4d6a-9d63-ad97a0341118/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:02:32,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f052b186-9d59-4d6a-9d63-ad97a0341118/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:02:32,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:02:32,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:02:32,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:02:32,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:02:32,152 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:02:32,154 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:02:32,181 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:02:32,695 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-11-23 02:02:32,696 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-11-23 02:02:32,696 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:02:32,921 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:02:32,921 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:02:32,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:02:32 BoogieIcfgContainer [2021-11-23 02:02:32,924 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:02:32,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:02:32,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:02:32,930 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:02:32,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:02:31" (1/3) ... [2021-11-23 02:02:32,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ba6fa83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:02:32, skipping insertion in model container [2021-11-23 02:02:32,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:02:31" (2/3) ... [2021-11-23 02:02:32,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ba6fa83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:02:32, skipping insertion in model container [2021-11-23 02:02:32,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:02:32" (3/3) ... [2021-11-23 02:02:32,933 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt_1.cil-1.c [2021-11-23 02:02:32,939 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:02:32,939 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:02:32,988 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:02:32,995 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 02:02:32,995 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:02:33,022 INFO L276 IsEmpty]: Start isEmpty. Operand has 84 states, 82 states have (on average 1.7682926829268293) internal successors, (145), 83 states have internal predecessors, (145), 0 states have call successors, (0), 0 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 02:02:33,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 02:02:33,029 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:33,030 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:02:33,030 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:02:33,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:33,035 INFO L85 PathProgramCache]: Analyzing trace with hash -861541409, now seen corresponding path program 1 times [2021-11-23 02:02:33,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:33,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771889030] [2021-11-23 02:02:33,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:33,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:33,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:33,335 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 02:02:33,335 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:33,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771889030] [2021-11-23 02:02:33,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771889030] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:33,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:02:33,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:02:33,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138374902] [2021-11-23 02:02:33,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:33,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:02:33,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:33,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:02:33,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:02:33,381 INFO L87 Difference]: Start difference. First operand has 84 states, 82 states have (on average 1.7682926829268293) internal successors, (145), 83 states have internal predecessors, (145), 0 states have call successors, (0), 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 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 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 02:02:33,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:33,682 INFO L93 Difference]: Finished difference Result 196 states and 338 transitions. [2021-11-23 02:02:33,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:02:33,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-11-23 02:02:33,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:33,694 INFO L225 Difference]: With dead ends: 196 [2021-11-23 02:02:33,694 INFO L226 Difference]: Without dead ends: 107 [2021-11-23 02:02:33,698 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 02:02:33,702 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 109 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:33,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 78 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:02:33,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-23 02:02:33,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 102. [2021-11-23 02:02:33,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.5346534653465347) internal successors, (155), 101 states have internal predecessors, (155), 0 states have call successors, (0), 0 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 02:02:33,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 155 transitions. [2021-11-23 02:02:33,745 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 155 transitions. Word has length 19 [2021-11-23 02:02:33,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:33,746 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 155 transitions. [2021-11-23 02:02:33,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 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 02:02:33,747 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 155 transitions. [2021-11-23 02:02:33,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 02:02:33,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:33,748 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] [2021-11-23 02:02:33,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:02:33,749 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:02:33,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:33,750 INFO L85 PathProgramCache]: Analyzing trace with hash -942487142, now seen corresponding path program 1 times [2021-11-23 02:02:33,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:33,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485026607] [2021-11-23 02:02:33,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:33,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:33,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:33,842 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 02:02:33,843 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:33,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485026607] [2021-11-23 02:02:33,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485026607] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:33,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:02:33,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:02:33,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268239824] [2021-11-23 02:02:33,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:33,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:02:33,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:33,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:02:33,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:02:33,848 INFO L87 Difference]: Start difference. First operand 102 states and 155 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 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 02:02:34,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:34,058 INFO L93 Difference]: Finished difference Result 230 states and 354 transitions. [2021-11-23 02:02:34,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:02:34,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-11-23 02:02:34,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:34,067 INFO L225 Difference]: With dead ends: 230 [2021-11-23 02:02:34,068 INFO L226 Difference]: Without dead ends: 129 [2021-11-23 02:02:34,069 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 02:02:34,073 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 85 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:34,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 52 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:02:34,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-23 02:02:34,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2021-11-23 02:02:34,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.5772357723577235) internal successors, (194), 123 states have internal predecessors, (194), 0 states have call successors, (0), 0 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 02:02:34,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 194 transitions. [2021-11-23 02:02:34,107 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 194 transitions. Word has length 20 [2021-11-23 02:02:34,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:34,109 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 194 transitions. [2021-11-23 02:02:34,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 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 02:02:34,110 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 194 transitions. [2021-11-23 02:02:34,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 02:02:34,113 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:34,114 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:02:34,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:02:34,115 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:02:34,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:34,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1537490325, now seen corresponding path program 1 times [2021-11-23 02:02:34,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:34,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881873414] [2021-11-23 02:02:34,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:34,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:34,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:34,204 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:02:34,204 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:34,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881873414] [2021-11-23 02:02:34,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881873414] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:34,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:02:34,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:02:34,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774712566] [2021-11-23 02:02:34,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:34,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:02:34,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:34,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:02:34,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:02:34,209 INFO L87 Difference]: Start difference. First operand 124 states and 194 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 02:02:34,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:34,360 INFO L93 Difference]: Finished difference Result 268 states and 423 transitions. [2021-11-23 02:02:34,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:02:34,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-23 02:02:34,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:34,364 INFO L225 Difference]: With dead ends: 268 [2021-11-23 02:02:34,364 INFO L226 Difference]: Without dead ends: 145 [2021-11-23 02:02:34,368 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 02:02:34,377 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 88 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:34,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 48 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:02:34,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-23 02:02:34,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2021-11-23 02:02:34,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.591549295774648) internal successors, (226), 142 states have internal predecessors, (226), 0 states have call successors, (0), 0 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 02:02:34,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 226 transitions. [2021-11-23 02:02:34,407 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 226 transitions. Word has length 37 [2021-11-23 02:02:34,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:34,408 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 226 transitions. [2021-11-23 02:02:34,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 02:02:34,409 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 226 transitions. [2021-11-23 02:02:34,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 02:02:34,416 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:34,417 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 02:02:34,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:02:34,418 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:02:34,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:34,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1575706832, now seen corresponding path program 1 times [2021-11-23 02:02:34,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:34,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582258454] [2021-11-23 02:02:34,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:34,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:34,467 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:02:34,467 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:34,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582258454] [2021-11-23 02:02:34,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582258454] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:34,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:02:34,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:02:34,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857588751] [2021-11-23 02:02:34,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:34,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:02:34,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:34,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:02:34,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:02:34,470 INFO L87 Difference]: Start difference. First operand 143 states and 226 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:02:34,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:34,596 INFO L93 Difference]: Finished difference Result 287 states and 453 transitions. [2021-11-23 02:02:34,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:02:34,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-23 02:02:34,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:34,598 INFO L225 Difference]: With dead ends: 287 [2021-11-23 02:02:34,598 INFO L226 Difference]: Without dead ends: 145 [2021-11-23 02:02:34,599 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 02:02:34,609 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 87 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:34,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 48 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:02:34,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-23 02:02:34,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2021-11-23 02:02:34,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.5774647887323943) internal successors, (224), 142 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:02:34,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 224 transitions. [2021-11-23 02:02:34,640 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 224 transitions. Word has length 38 [2021-11-23 02:02:34,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:34,640 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 224 transitions. [2021-11-23 02:02:34,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:02:34,641 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 224 transitions. [2021-11-23 02:02:34,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-23 02:02:34,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:34,646 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:02:34,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:02:34,647 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:02:34,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:34,648 INFO L85 PathProgramCache]: Analyzing trace with hash 823600069, now seen corresponding path program 1 times [2021-11-23 02:02:34,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:34,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748240292] [2021-11-23 02:02:34,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:34,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:34,731 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:02:34,731 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:34,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748240292] [2021-11-23 02:02:34,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748240292] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:34,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:02:34,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:02:34,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758264757] [2021-11-23 02:02:34,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:34,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:02:34,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:34,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:02:34,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:02:34,735 INFO L87 Difference]: Start difference. First operand 143 states and 224 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:02:34,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:34,850 INFO L93 Difference]: Finished difference Result 305 states and 481 transitions. [2021-11-23 02:02:34,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:02:34,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-23 02:02:34,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:34,853 INFO L225 Difference]: With dead ends: 305 [2021-11-23 02:02:34,853 INFO L226 Difference]: Without dead ends: 163 [2021-11-23 02:02:34,854 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 02:02:34,857 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 90 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:34,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 50 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:02:34,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-23 02:02:34,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 160. [2021-11-23 02:02:34,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.578616352201258) internal successors, (251), 159 states have internal predecessors, (251), 0 states have call successors, (0), 0 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 02:02:34,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 251 transitions. [2021-11-23 02:02:34,887 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 251 transitions. Word has length 52 [2021-11-23 02:02:34,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:34,887 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 251 transitions. [2021-11-23 02:02:34,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:02:34,888 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 251 transitions. [2021-11-23 02:02:34,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-23 02:02:34,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:34,889 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:02:34,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:02:34,890 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:02:34,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:34,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1953460266, now seen corresponding path program 1 times [2021-11-23 02:02:34,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:34,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83222758] [2021-11-23 02:02:34,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:34,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:34,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:02:34,926 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:34,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83222758] [2021-11-23 02:02:34,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83222758] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:34,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:02:34,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:02:34,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137365073] [2021-11-23 02:02:34,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:34,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:02:34,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:34,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:02:34,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:02:34,929 INFO L87 Difference]: Start difference. First operand 160 states and 251 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:02:35,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:35,049 INFO L93 Difference]: Finished difference Result 322 states and 505 transitions. [2021-11-23 02:02:35,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:02:35,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-23 02:02:35,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:35,052 INFO L225 Difference]: With dead ends: 322 [2021-11-23 02:02:35,052 INFO L226 Difference]: Without dead ends: 163 [2021-11-23 02:02:35,052 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 02:02:35,054 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 89 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:35,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 50 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:02:35,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-23 02:02:35,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 160. [2021-11-23 02:02:35,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.559748427672956) internal successors, (248), 159 states have internal predecessors, (248), 0 states have call successors, (0), 0 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 02:02:35,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 248 transitions. [2021-11-23 02:02:35,073 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 248 transitions. Word has length 53 [2021-11-23 02:02:35,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:35,075 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 248 transitions. [2021-11-23 02:02:35,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:02:35,076 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 248 transitions. [2021-11-23 02:02:35,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 02:02:35,077 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:35,078 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 02:02:35,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:02:35,078 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:02:35,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:35,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1053166646, now seen corresponding path program 1 times [2021-11-23 02:02:35,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:35,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197067198] [2021-11-23 02:02:35,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:35,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:35,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:35,162 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:02:35,163 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:35,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197067198] [2021-11-23 02:02:35,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197067198] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:35,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:02:35,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:02:35,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803973349] [2021-11-23 02:02:35,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:35,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:02:35,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:35,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:02:35,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:02:35,167 INFO L87 Difference]: Start difference. First operand 160 states and 248 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:02:35,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:35,311 INFO L93 Difference]: Finished difference Result 358 states and 562 transitions. [2021-11-23 02:02:35,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:02:35,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-23 02:02:35,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:35,314 INFO L225 Difference]: With dead ends: 358 [2021-11-23 02:02:35,314 INFO L226 Difference]: Without dead ends: 198 [2021-11-23 02:02:35,315 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 02:02:35,316 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 62 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:35,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 53 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:02:35,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-23 02:02:35,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2021-11-23 02:02:35,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.5888324873096447) internal successors, (313), 197 states have internal predecessors, (313), 0 states have call successors, (0), 0 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 02:02:35,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 313 transitions. [2021-11-23 02:02:35,326 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 313 transitions. Word has length 56 [2021-11-23 02:02:35,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:35,327 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 313 transitions. [2021-11-23 02:02:35,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:02:35,327 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 313 transitions. [2021-11-23 02:02:35,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 02:02:35,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:35,329 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 02:02:35,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:02:35,329 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:02:35,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:35,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1615870931, now seen corresponding path program 1 times [2021-11-23 02:02:35,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:35,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595793133] [2021-11-23 02:02:35,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:35,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:35,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:35,396 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-23 02:02:35,396 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:35,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595793133] [2021-11-23 02:02:35,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595793133] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:35,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:02:35,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:02:35,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55507705] [2021-11-23 02:02:35,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:35,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:02:35,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:35,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:02:35,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:02:35,400 INFO L87 Difference]: Start difference. First operand 198 states and 313 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:02:35,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:35,504 INFO L93 Difference]: Finished difference Result 412 states and 653 transitions. [2021-11-23 02:02:35,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:02:35,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-23 02:02:35,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:35,509 INFO L225 Difference]: With dead ends: 412 [2021-11-23 02:02:35,509 INFO L226 Difference]: Without dead ends: 215 [2021-11-23 02:02:35,510 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 02:02:35,511 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 92 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:35,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 48 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:02:35,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-23 02:02:35,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 213. [2021-11-23 02:02:35,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.5754716981132075) internal successors, (334), 212 states have internal predecessors, (334), 0 states have call successors, (0), 0 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 02:02:35,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 334 transitions. [2021-11-23 02:02:35,524 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 334 transitions. Word has length 65 [2021-11-23 02:02:35,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:35,524 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 334 transitions. [2021-11-23 02:02:35,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:02:35,526 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 334 transitions. [2021-11-23 02:02:35,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 02:02:35,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:35,527 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:02:35,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:02:35,527 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:02:35,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:35,528 INFO L85 PathProgramCache]: Analyzing trace with hash -282798034, now seen corresponding path program 1 times [2021-11-23 02:02:35,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:35,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977796363] [2021-11-23 02:02:35,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:35,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:35,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:35,583 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-23 02:02:35,584 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:35,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977796363] [2021-11-23 02:02:35,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977796363] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:35,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:02:35,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:02:35,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362339807] [2021-11-23 02:02:35,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:35,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:02:35,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:35,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:02:35,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:02:35,587 INFO L87 Difference]: Start difference. First operand 213 states and 334 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 02:02:35,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:35,692 INFO L93 Difference]: Finished difference Result 427 states and 669 transitions. [2021-11-23 02:02:35,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:02:35,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 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 66 [2021-11-23 02:02:35,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:35,695 INFO L225 Difference]: With dead ends: 427 [2021-11-23 02:02:35,695 INFO L226 Difference]: Without dead ends: 215 [2021-11-23 02:02:35,695 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 02:02:35,698 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 91 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:35,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 48 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:02:35,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-23 02:02:35,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 213. [2021-11-23 02:02:35,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.5518867924528301) internal successors, (329), 212 states have internal predecessors, (329), 0 states have call successors, (0), 0 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 02:02:35,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 329 transitions. [2021-11-23 02:02:35,709 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 329 transitions. Word has length 66 [2021-11-23 02:02:35,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:35,709 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 329 transitions. [2021-11-23 02:02:35,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 02:02:35,710 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 329 transitions. [2021-11-23 02:02:35,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-23 02:02:35,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:35,711 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:02:35,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:02:35,715 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:02:35,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:35,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1277957150, now seen corresponding path program 1 times [2021-11-23 02:02:35,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:35,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120286302] [2021-11-23 02:02:35,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:35,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:35,768 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-23 02:02:35,768 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:35,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120286302] [2021-11-23 02:02:35,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120286302] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:35,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:02:35,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:02:35,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68433013] [2021-11-23 02:02:35,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:35,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:02:35,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:35,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:02:35,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:02:35,771 INFO L87 Difference]: Start difference. First operand 213 states and 329 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 02:02:35,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:35,875 INFO L93 Difference]: Finished difference Result 440 states and 681 transitions. [2021-11-23 02:02:35,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:02:35,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-23 02:02:35,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:35,879 INFO L225 Difference]: With dead ends: 440 [2021-11-23 02:02:35,879 INFO L226 Difference]: Without dead ends: 228 [2021-11-23 02:02:35,880 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 02:02:35,881 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 94 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:35,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 56 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:02:35,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-23 02:02:35,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 226. [2021-11-23 02:02:35,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.5333333333333334) internal successors, (345), 225 states have internal predecessors, (345), 0 states have call successors, (0), 0 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 02:02:35,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 345 transitions. [2021-11-23 02:02:35,894 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 345 transitions. Word has length 76 [2021-11-23 02:02:35,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:35,894 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 345 transitions. [2021-11-23 02:02:35,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 02:02:35,895 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 345 transitions. [2021-11-23 02:02:35,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 02:02:35,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:35,899 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:02:35,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:02:35,899 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:02:35,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:35,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1797887933, now seen corresponding path program 1 times [2021-11-23 02:02:35,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:35,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693237222] [2021-11-23 02:02:35,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:35,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:35,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:35,946 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-23 02:02:35,947 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:35,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693237222] [2021-11-23 02:02:35,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693237222] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:35,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:02:35,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:02:35,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855188068] [2021-11-23 02:02:35,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:35,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:02:35,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:35,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:02:35,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:02:35,950 INFO L87 Difference]: Start difference. First operand 226 states and 345 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 02:02:36,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:36,049 INFO L93 Difference]: Finished difference Result 453 states and 691 transitions. [2021-11-23 02:02:36,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:02:36,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-23 02:02:36,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:36,051 INFO L225 Difference]: With dead ends: 453 [2021-11-23 02:02:36,052 INFO L226 Difference]: Without dead ends: 228 [2021-11-23 02:02:36,052 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 02:02:36,054 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 93 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:36,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 48 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:02:36,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-23 02:02:36,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 226. [2021-11-23 02:02:36,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.5066666666666666) internal successors, (339), 225 states have internal predecessors, (339), 0 states have call successors, (0), 0 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 02:02:36,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 339 transitions. [2021-11-23 02:02:36,066 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 339 transitions. Word has length 77 [2021-11-23 02:02:36,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:36,067 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 339 transitions. [2021-11-23 02:02:36,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 02:02:36,067 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 339 transitions. [2021-11-23 02:02:36,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-23 02:02:36,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:36,072 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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] [2021-11-23 02:02:36,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 02:02:36,072 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:02:36,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:36,073 INFO L85 PathProgramCache]: Analyzing trace with hash 729737107, now seen corresponding path program 1 times [2021-11-23 02:02:36,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:36,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053954142] [2021-11-23 02:02:36,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:36,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:36,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:36,147 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:02:36,147 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:36,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053954142] [2021-11-23 02:02:36,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053954142] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:02:36,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256899228] [2021-11-23 02:02:36,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:36,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:02:36,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f052b186-9d59-4d6a-9d63-ad97a0341118/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:02:36,158 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f052b186-9d59-4d6a-9d63-ad97a0341118/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:02:36,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f052b186-9d59-4d6a-9d63-ad97a0341118/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:02:36,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:36,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:02:36,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:02:36,578 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-23 02:02:36,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:02:36,822 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-23 02:02:36,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256899228] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:02:36,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:02:36,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 5 [2021-11-23 02:02:36,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818351574] [2021-11-23 02:02:36,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:36,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:02:36,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:36,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:02:36,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:02:36,825 INFO L87 Difference]: Start difference. First operand 226 states and 339 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 02:02:36,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:36,885 INFO L93 Difference]: Finished difference Result 450 states and 676 transitions. [2021-11-23 02:02:36,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:02:36,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 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 85 [2021-11-23 02:02:36,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:36,890 INFO L225 Difference]: With dead ends: 450 [2021-11-23 02:02:36,890 INFO L226 Difference]: Without dead ends: 448 [2021-11-23 02:02:36,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:02:36,893 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 75 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:36,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 197 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:02:36,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-11-23 02:02:36,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 447. [2021-11-23 02:02:36,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.5089686098654709) internal successors, (673), 446 states have internal predecessors, (673), 0 states have call successors, (0), 0 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 02:02:36,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 673 transitions. [2021-11-23 02:02:36,936 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 673 transitions. Word has length 85 [2021-11-23 02:02:36,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:36,936 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 673 transitions. [2021-11-23 02:02:36,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 02:02:36,937 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 673 transitions. [2021-11-23 02:02:36,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 02:02:36,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:36,939 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 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] [2021-11-23 02:02:36,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f052b186-9d59-4d6a-9d63-ad97a0341118/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:02:37,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f052b186-9d59-4d6a-9d63-ad97a0341118/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 02:02:37,153 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:02:37,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:37,154 INFO L85 PathProgramCache]: Analyzing trace with hash 916330689, now seen corresponding path program 1 times [2021-11-23 02:02:37,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:37,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702023604] [2021-11-23 02:02:37,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:37,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:37,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:37,182 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-11-23 02:02:37,183 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:37,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702023604] [2021-11-23 02:02:37,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702023604] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:37,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:02:37,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:02:37,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657807363] [2021-11-23 02:02:37,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:37,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:02:37,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:37,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:02:37,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:02:37,185 INFO L87 Difference]: Start difference. First operand 447 states and 673 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 02:02:37,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:37,304 INFO L93 Difference]: Finished difference Result 722 states and 1081 transitions. [2021-11-23 02:02:37,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:02:37,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 0 states have call successors, (0), 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 106 [2021-11-23 02:02:37,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:37,308 INFO L225 Difference]: With dead ends: 722 [2021-11-23 02:02:37,308 INFO L226 Difference]: Without dead ends: 497 [2021-11-23 02:02:37,309 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 02:02:37,310 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 79 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:37,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 53 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:02:37,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-11-23 02:02:37,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 495. [2021-11-23 02:02:37,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 1.491902834008097) internal successors, (737), 494 states have internal predecessors, (737), 0 states have call successors, (0), 0 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 02:02:37,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 737 transitions. [2021-11-23 02:02:37,334 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 737 transitions. Word has length 106 [2021-11-23 02:02:37,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:37,334 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 737 transitions. [2021-11-23 02:02:37,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 02:02:37,335 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 737 transitions. [2021-11-23 02:02:37,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-23 02:02:37,337 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:37,337 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 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] [2021-11-23 02:02:37,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 02:02:37,338 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:02:37,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:37,338 INFO L85 PathProgramCache]: Analyzing trace with hash -367693498, now seen corresponding path program 1 times [2021-11-23 02:02:37,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:37,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136759643] [2021-11-23 02:02:37,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:37,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:37,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:37,367 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-11-23 02:02:37,367 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:37,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136759643] [2021-11-23 02:02:37,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136759643] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:37,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:02:37,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:02:37,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147815194] [2021-11-23 02:02:37,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:37,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:02:37,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:37,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:02:37,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:02:37,370 INFO L87 Difference]: Start difference. First operand 495 states and 737 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 02:02:37,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:37,500 INFO L93 Difference]: Finished difference Result 748 states and 1113 transitions. [2021-11-23 02:02:37,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:02:37,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 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 107 [2021-11-23 02:02:37,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:37,504 INFO L225 Difference]: With dead ends: 748 [2021-11-23 02:02:37,505 INFO L226 Difference]: Without dead ends: 499 [2021-11-23 02:02:37,505 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 02:02:37,506 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 77 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:37,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 54 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:02:37,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-11-23 02:02:37,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 497. [2021-11-23 02:02:37,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 1.4858870967741935) internal successors, (737), 496 states have internal predecessors, (737), 0 states have call successors, (0), 0 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 02:02:37,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 737 transitions. [2021-11-23 02:02:37,534 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 737 transitions. Word has length 107 [2021-11-23 02:02:37,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:37,534 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 737 transitions. [2021-11-23 02:02:37,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 02:02:37,535 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 737 transitions. [2021-11-23 02:02:37,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-23 02:02:37,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:37,538 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 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] [2021-11-23 02:02:37,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 02:02:37,539 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:02:37,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:37,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1402873677, now seen corresponding path program 1 times [2021-11-23 02:02:37,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:37,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383740627] [2021-11-23 02:02:37,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:37,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:37,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:37,582 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-11-23 02:02:37,582 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:37,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383740627] [2021-11-23 02:02:37,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383740627] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:37,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:02:37,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:02:37,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687775890] [2021-11-23 02:02:37,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:37,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:02:37,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:37,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:02:37,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:02:37,585 INFO L87 Difference]: Start difference. First operand 497 states and 737 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 02:02:37,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:37,731 INFO L93 Difference]: Finished difference Result 1089 states and 1629 transitions. [2021-11-23 02:02:37,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:02:37,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 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 176 [2021-11-23 02:02:37,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:37,735 INFO L225 Difference]: With dead ends: 1089 [2021-11-23 02:02:37,736 INFO L226 Difference]: Without dead ends: 593 [2021-11-23 02:02:37,737 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 02:02:37,737 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 63 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:37,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 58 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:02:37,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-11-23 02:02:37,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 589. [2021-11-23 02:02:37,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 1.5051020408163265) internal successors, (885), 588 states have internal predecessors, (885), 0 states have call successors, (0), 0 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 02:02:37,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 885 transitions. [2021-11-23 02:02:37,764 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 885 transitions. Word has length 176 [2021-11-23 02:02:37,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:37,764 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 885 transitions. [2021-11-23 02:02:37,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 02:02:37,765 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 885 transitions. [2021-11-23 02:02:37,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-23 02:02:37,767 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:37,768 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:02:37,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 02:02:37,768 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:02:37,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:37,769 INFO L85 PathProgramCache]: Analyzing trace with hash -498135752, now seen corresponding path program 1 times [2021-11-23 02:02:37,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:37,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004383255] [2021-11-23 02:02:37,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:37,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:37,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-11-23 02:02:37,807 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:37,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004383255] [2021-11-23 02:02:37,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004383255] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:37,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:02:37,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:02:37,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790508949] [2021-11-23 02:02:37,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:37,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:02:37,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:37,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:02:37,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:02:37,810 INFO L87 Difference]: Start difference. First operand 589 states and 885 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 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 02:02:37,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:37,972 INFO L93 Difference]: Finished difference Result 1183 states and 1777 transitions. [2021-11-23 02:02:37,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:02:37,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 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 177 [2021-11-23 02:02:37,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:37,977 INFO L225 Difference]: With dead ends: 1183 [2021-11-23 02:02:37,977 INFO L226 Difference]: Without dead ends: 595 [2021-11-23 02:02:37,978 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 02:02:37,979 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 65 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:37,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 55 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:02:37,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-11-23 02:02:38,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 591. [2021-11-23 02:02:38,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 1.5) internal successors, (885), 590 states have internal predecessors, (885), 0 states have call successors, (0), 0 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 02:02:38,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 885 transitions. [2021-11-23 02:02:38,008 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 885 transitions. Word has length 177 [2021-11-23 02:02:38,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:38,009 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 885 transitions. [2021-11-23 02:02:38,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 0 states have call successors, (0), 0 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 02:02:38,009 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 885 transitions. [2021-11-23 02:02:38,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-23 02:02:38,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:38,013 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 11, 11, 9, 9, 7, 7, 5, 5, 3, 3, 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] [2021-11-23 02:02:38,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 02:02:38,013 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:02:38,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:38,014 INFO L85 PathProgramCache]: Analyzing trace with hash 636150113, now seen corresponding path program 1 times [2021-11-23 02:02:38,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:38,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162406026] [2021-11-23 02:02:38,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:38,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:38,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:38,067 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 422 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-23 02:02:38,067 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:38,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162406026] [2021-11-23 02:02:38,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162406026] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:38,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:02:38,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:02:38,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106199818] [2021-11-23 02:02:38,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:38,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:02:38,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:38,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:02:38,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:02:38,070 INFO L87 Difference]: Start difference. First operand 591 states and 885 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 02:02:38,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:38,216 INFO L93 Difference]: Finished difference Result 1281 states and 1913 transitions. [2021-11-23 02:02:38,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:02:38,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 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 192 [2021-11-23 02:02:38,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:38,221 INFO L225 Difference]: With dead ends: 1281 [2021-11-23 02:02:38,221 INFO L226 Difference]: Without dead ends: 673 [2021-11-23 02:02:38,222 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 02:02:38,224 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 67 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:38,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 115 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:02:38,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-11-23 02:02:38,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 653. [2021-11-23 02:02:38,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 1.4095092024539877) internal successors, (919), 652 states have internal predecessors, (919), 0 states have call successors, (0), 0 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 02:02:38,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 919 transitions. [2021-11-23 02:02:38,254 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 919 transitions. Word has length 192 [2021-11-23 02:02:38,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:38,254 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 919 transitions. [2021-11-23 02:02:38,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 02:02:38,255 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 919 transitions. [2021-11-23 02:02:38,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-23 02:02:38,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:38,258 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 11, 11, 9, 9, 7, 7, 5, 5, 3, 3, 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] [2021-11-23 02:02:38,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 02:02:38,258 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:02:38,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:38,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1873122768, now seen corresponding path program 1 times [2021-11-23 02:02:38,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:38,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471532547] [2021-11-23 02:02:38,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:38,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:38,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:38,345 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 444 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-23 02:02:38,345 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:38,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471532547] [2021-11-23 02:02:38,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471532547] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:38,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:02:38,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:02:38,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566468785] [2021-11-23 02:02:38,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:38,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:02:38,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:38,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:02:38,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:02:38,349 INFO L87 Difference]: Start difference. First operand 653 states and 919 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 02:02:38,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:38,501 INFO L93 Difference]: Finished difference Result 1427 states and 2007 transitions. [2021-11-23 02:02:38,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:02:38,502 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 194 [2021-11-23 02:02:38,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:38,507 INFO L225 Difference]: With dead ends: 1427 [2021-11-23 02:02:38,507 INFO L226 Difference]: Without dead ends: 775 [2021-11-23 02:02:38,508 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 02:02:38,509 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 64 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:38,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 94 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:02:38,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-11-23 02:02:38,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 677. [2021-11-23 02:02:38,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 1.400887573964497) internal successors, (947), 676 states have internal predecessors, (947), 0 states have call successors, (0), 0 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 02:02:38,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 947 transitions. [2021-11-23 02:02:38,549 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 947 transitions. Word has length 194 [2021-11-23 02:02:38,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:38,550 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 947 transitions. [2021-11-23 02:02:38,550 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 02:02:38,551 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 947 transitions. [2021-11-23 02:02:38,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-23 02:02:38,554 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:38,555 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 12, 12, 10, 10, 8, 8, 6, 6, 4, 4, 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] [2021-11-23 02:02:38,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 02:02:38,555 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:02:38,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:38,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1713546080, now seen corresponding path program 1 times [2021-11-23 02:02:38,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:38,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931762655] [2021-11-23 02:02:38,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:38,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:38,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:38,626 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 491 proven. 0 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2021-11-23 02:02:38,626 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:38,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931762655] [2021-11-23 02:02:38,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931762655] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:38,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:02:38,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:02:38,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664900837] [2021-11-23 02:02:38,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:38,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:02:38,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:38,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:02:38,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:02:38,630 INFO L87 Difference]: Start difference. First operand 677 states and 947 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 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 02:02:38,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:38,785 INFO L93 Difference]: Finished difference Result 1426 states and 1993 transitions. [2021-11-23 02:02:38,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:02:38,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 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 219 [2021-11-23 02:02:38,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:38,790 INFO L225 Difference]: With dead ends: 1426 [2021-11-23 02:02:38,790 INFO L226 Difference]: Without dead ends: 740 [2021-11-23 02:02:38,791 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 02:02:38,794 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 71 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:38,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 111 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:02:38,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-11-23 02:02:38,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 720. [2021-11-23 02:02:38,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 719 states have (on average 1.3866481223922114) internal successors, (997), 719 states have internal predecessors, (997), 0 states have call successors, (0), 0 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 02:02:38,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 997 transitions. [2021-11-23 02:02:38,850 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 997 transitions. Word has length 219 [2021-11-23 02:02:38,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:38,852 INFO L470 AbstractCegarLoop]: Abstraction has 720 states and 997 transitions. [2021-11-23 02:02:38,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 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 02:02:38,852 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 997 transitions. [2021-11-23 02:02:38,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-23 02:02:38,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:38,857 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 13, 13, 11, 11, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:02:38,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 02:02:38,857 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:02:38,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:38,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1982307394, now seen corresponding path program 1 times [2021-11-23 02:02:38,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:38,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876316829] [2021-11-23 02:02:38,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:38,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:38,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:38,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 560 proven. 0 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked. [2021-11-23 02:02:38,929 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:38,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876316829] [2021-11-23 02:02:38,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876316829] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:02:38,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:02:38,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:02:38,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873595267] [2021-11-23 02:02:38,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:02:38,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:02:38,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:02:38,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:02:38,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:02:38,932 INFO L87 Difference]: Start difference. First operand 720 states and 997 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 02:02:39,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:02:39,088 INFO L93 Difference]: Finished difference Result 1454 states and 2009 transitions. [2021-11-23 02:02:39,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:02:39,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 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 252 [2021-11-23 02:02:39,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:02:39,093 INFO L225 Difference]: With dead ends: 1454 [2021-11-23 02:02:39,094 INFO L226 Difference]: Without dead ends: 740 [2021-11-23 02:02:39,095 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 02:02:39,096 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 73 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:02:39,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 107 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:02:39,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-11-23 02:02:39,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 720. [2021-11-23 02:02:39,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 719 states have (on average 1.3755215577190543) internal successors, (989), 719 states have internal predecessors, (989), 0 states have call successors, (0), 0 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 02:02:39,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 989 transitions. [2021-11-23 02:02:39,135 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 989 transitions. Word has length 252 [2021-11-23 02:02:39,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:02:39,136 INFO L470 AbstractCegarLoop]: Abstraction has 720 states and 989 transitions. [2021-11-23 02:02:39,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 02:02:39,136 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 989 transitions. [2021-11-23 02:02:39,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-11-23 02:02:39,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:02:39,141 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:02:39,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-23 02:02:39,141 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:02:39,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:02:39,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1320479068, now seen corresponding path program 1 times [2021-11-23 02:02:39,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:02:39,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703566459] [2021-11-23 02:02:39,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:39,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:02:39,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:39,280 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 291 proven. 266 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2021-11-23 02:02:39,280 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:02:39,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703566459] [2021-11-23 02:02:39,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703566459] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:02:39,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026849312] [2021-11-23 02:02:39,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:02:39,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:02:39,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f052b186-9d59-4d6a-9d63-ad97a0341118/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:02:39,285 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f052b186-9d59-4d6a-9d63-ad97a0341118/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:02:39,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f052b186-9d59-4d6a-9d63-ad97a0341118/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:02:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:02:39,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:02:39,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:02:40,002 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 308 proven. 17 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2021-11-23 02:02:40,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:02:40,313 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 308 proven. 17 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2021-11-23 02:02:40,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026849312] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:02:40,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [556445955] [2021-11-23 02:02:40,349 INFO L159 IcfgInterpreter]: Started Sifa with 67 locations of interest [2021-11-23 02:02:40,349 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:02:40,354 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:02:40,361 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:02:40,361 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs