./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.08.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878b815e-5d69-4dc8-83d7-1bed67fc20a2/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878b815e-5d69-4dc8-83d7-1bed67fc20a2/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878b815e-5d69-4dc8-83d7-1bed67fc20a2/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878b815e-5d69-4dc8-83d7-1bed67fc20a2/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.08.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878b815e-5d69-4dc8-83d7-1bed67fc20a2/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878b815e-5d69-4dc8-83d7-1bed67fc20a2/bin/utaipan-TEXQjIfE4P --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 d0fbb3eaba725aed5c3b8bf09c66f0f1daed4feeee0b9a3792dc033de334e501 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:50:34,741 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:50:34,752 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:50:34,804 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:50:34,805 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:50:34,809 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:50:34,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:50:34,818 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:50:34,821 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:50:34,829 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:50:34,831 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:50:34,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:50:34,834 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:50:34,837 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:50:34,840 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:50:34,843 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:50:34,845 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:50:34,846 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:50:34,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:50:34,861 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:50:34,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:50:34,866 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:50:34,871 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:50:34,872 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:50:34,886 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:50:34,886 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:50:34,887 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:50:34,889 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:50:34,890 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:50:34,892 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:50:34,893 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:50:34,894 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:50:34,897 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:50:34,898 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:50:34,900 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:50:34,900 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:50:34,901 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:50:34,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:50:34,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:50:34,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:50:34,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:50:34,905 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878b815e-5d69-4dc8-83d7-1bed67fc20a2/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:50:34,956 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:50:34,957 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:50:34,957 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:50:34,957 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:50:34,958 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:50:34,958 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:50:34,959 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:50:34,959 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:50:34,959 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:50:34,959 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:50:34,960 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:50:34,960 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:50:34,960 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:50:34,960 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:50:34,961 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:50:34,961 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:50:34,961 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:50:34,962 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:50:34,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:50:34,963 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:50:34,963 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:50:34,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:50:34,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:50:34,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:50:34,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:50:34,964 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:50:34,965 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:50:34,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:50:34,965 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:50:34,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:50:34,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:50:34,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:50:34,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:50:34,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:50:34,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:50:34,967 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:50:34,968 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:50:34,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:50:34,968 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:50:34,969 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:50:34,969 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:50:34,969 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_878b815e-5d69-4dc8-83d7-1bed67fc20a2/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878b815e-5d69-4dc8-83d7-1bed67fc20a2/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d0fbb3eaba725aed5c3b8bf09c66f0f1daed4feeee0b9a3792dc033de334e501 [2021-11-21 00:50:35,265 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:50:35,328 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:50:35,331 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:50:35,333 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:50:35,333 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:50:35,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878b815e-5d69-4dc8-83d7-1bed67fc20a2/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/systemc/transmitter.08.cil.c [2021-11-21 00:50:35,411 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878b815e-5d69-4dc8-83d7-1bed67fc20a2/bin/utaipan-TEXQjIfE4P/data/f82ee8c84/c049fe6af54c4d5293bc9baf23099b02/FLAG1445b3231 [2021-11-21 00:50:35,954 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:50:35,955 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878b815e-5d69-4dc8-83d7-1bed67fc20a2/sv-benchmarks/c/systemc/transmitter.08.cil.c [2021-11-21 00:50:35,967 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878b815e-5d69-4dc8-83d7-1bed67fc20a2/bin/utaipan-TEXQjIfE4P/data/f82ee8c84/c049fe6af54c4d5293bc9baf23099b02/FLAG1445b3231 [2021-11-21 00:50:36,298 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878b815e-5d69-4dc8-83d7-1bed67fc20a2/bin/utaipan-TEXQjIfE4P/data/f82ee8c84/c049fe6af54c4d5293bc9baf23099b02 [2021-11-21 00:50:36,301 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:50:36,302 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:50:36,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:50:36,304 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:50:36,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:50:36,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:50:36" (1/1) ... [2021-11-21 00:50:36,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d059ae3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:50:36, skipping insertion in model container [2021-11-21 00:50:36,309 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:50:36" (1/1) ... [2021-11-21 00:50:36,316 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:50:36,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:50:36,579 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_878b815e-5d69-4dc8-83d7-1bed67fc20a2/sv-benchmarks/c/systemc/transmitter.08.cil.c[706,719] [2021-11-21 00:50:36,728 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:50:36,737 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:50:36,748 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_878b815e-5d69-4dc8-83d7-1bed67fc20a2/sv-benchmarks/c/systemc/transmitter.08.cil.c[706,719] [2021-11-21 00:50:36,824 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:50:36,851 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:50:36,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:50:36 WrapperNode [2021-11-21 00:50:36,852 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:50:36,854 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:50:36,854 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:50:36,854 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:50:36,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:50:36" (1/1) ... [2021-11-21 00:50:36,872 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:50:36" (1/1) ... [2021-11-21 00:50:36,918 INFO L137 Inliner]: procedures = 44, calls = 54, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 606 [2021-11-21 00:50:36,924 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:50:36,925 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:50:36,926 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:50:36,926 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:50:36,935 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:50:36" (1/1) ... [2021-11-21 00:50:36,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:50:36" (1/1) ... [2021-11-21 00:50:36,940 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:50:36" (1/1) ... [2021-11-21 00:50:36,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:50:36" (1/1) ... [2021-11-21 00:50:36,957 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:50:36" (1/1) ... [2021-11-21 00:50:36,991 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:50:36" (1/1) ... [2021-11-21 00:50:36,994 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:50:36" (1/1) ... [2021-11-21 00:50:36,999 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:50:37,000 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:50:37,000 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:50:37,000 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:50:37,001 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:50:36" (1/1) ... [2021-11-21 00:50:37,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:50:37,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878b815e-5d69-4dc8-83d7-1bed67fc20a2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:50:37,034 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878b815e-5d69-4dc8-83d7-1bed67fc20a2/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:50:37,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878b815e-5d69-4dc8-83d7-1bed67fc20a2/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:50:37,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:50:37,084 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-21 00:50:37,084 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-21 00:50:37,084 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-21 00:50:37,085 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-21 00:50:37,085 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-21 00:50:37,085 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-21 00:50:37,085 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-21 00:50:37,085 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-21 00:50:37,086 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-21 00:50:37,086 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-21 00:50:37,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:50:37,086 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-21 00:50:37,086 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-21 00:50:37,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:50:37,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:50:37,182 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:50:37,184 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:50:37,827 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:50:38,142 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:50:38,143 INFO L301 CfgBuilder]: Removed 12 assume(true) statements. [2021-11-21 00:50:38,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:50:38 BoogieIcfgContainer [2021-11-21 00:50:38,146 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:50:38,148 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:50:38,148 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:50:38,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:50:38,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:50:36" (1/3) ... [2021-11-21 00:50:38,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e33cc32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:50:38, skipping insertion in model container [2021-11-21 00:50:38,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:50:36" (2/3) ... [2021-11-21 00:50:38,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e33cc32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:50:38, skipping insertion in model container [2021-11-21 00:50:38,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:50:38" (3/3) ... [2021-11-21 00:50:38,155 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.08.cil.c [2021-11-21 00:50:38,160 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:50:38,160 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:50:38,210 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:50:38,218 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 [2021-11-21 00:50:38,218 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:50:38,239 INFO L276 IsEmpty]: Start isEmpty. Operand has 142 states, 113 states have (on average 1.5486725663716814) internal successors, (175), 115 states have internal predecessors, (175), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-21 00:50:38,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-21 00:50:38,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:38,250 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:50:38,251 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:50:38,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:38,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1115745721, now seen corresponding path program 1 times [2021-11-21 00:50:38,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:50:38,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774777781] [2021-11-21 00:50:38,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:38,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:50:38,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:38,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:50:38,677 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:50:38,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774777781] [2021-11-21 00:50:38,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774777781] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:50:38,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:50:38,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:50:38,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269768440] [2021-11-21 00:50:38,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:50:38,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:50:38,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:50:38,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:50:38,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:50:38,727 INFO L87 Difference]: Start difference. First operand has 142 states, 113 states have (on average 1.5486725663716814) internal successors, (175), 115 states have internal predecessors, (175), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:50:39,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:50:39,294 INFO L93 Difference]: Finished difference Result 413 states and 642 transitions. [2021-11-21 00:50:39,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:50:39,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2021-11-21 00:50:39,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:50:39,309 INFO L225 Difference]: With dead ends: 413 [2021-11-21 00:50:39,309 INFO L226 Difference]: Without dead ends: 272 [2021-11-21 00:50:39,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:50:39,319 INFO L933 BasicCegarLoop]: 327 mSDtfsCounter, 375 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:50:39,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 578 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:50:39,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-21 00:50:39,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 268. [2021-11-21 00:50:39,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 217 states have (on average 1.4976958525345623) internal successors, (325), 219 states have internal predecessors, (325), 38 states have call successors, (38), 12 states have call predecessors, (38), 12 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2021-11-21 00:50:39,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 401 transitions. [2021-11-21 00:50:39,393 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 401 transitions. Word has length 61 [2021-11-21 00:50:39,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:50:39,394 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 401 transitions. [2021-11-21 00:50:39,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:50:39,395 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 401 transitions. [2021-11-21 00:50:39,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-21 00:50:39,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:39,399 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:50:39,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:50:39,399 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:50:39,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:39,400 INFO L85 PathProgramCache]: Analyzing trace with hash -985095494, now seen corresponding path program 1 times [2021-11-21 00:50:39,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:50:39,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86882977] [2021-11-21 00:50:39,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:39,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:50:39,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:39,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:50:39,509 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:50:39,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86882977] [2021-11-21 00:50:39,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86882977] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:50:39,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:50:39,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:50:39,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002984037] [2021-11-21 00:50:39,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:50:39,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:50:39,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:50:39,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:50:39,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:50:39,537 INFO L87 Difference]: Start difference. First operand 268 states and 401 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:50:40,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:50:40,325 INFO L93 Difference]: Finished difference Result 1549 states and 2443 transitions. [2021-11-21 00:50:40,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:50:40,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2021-11-21 00:50:40,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:50:40,350 INFO L225 Difference]: With dead ends: 1549 [2021-11-21 00:50:40,350 INFO L226 Difference]: Without dead ends: 1286 [2021-11-21 00:50:40,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:50:40,360 INFO L933 BasicCegarLoop]: 380 mSDtfsCounter, 941 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 952 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:50:40,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [952 Valid, 809 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 00:50:40,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2021-11-21 00:50:40,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1250. [2021-11-21 00:50:40,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1027 states have (on average 1.49269717624148) internal successors, (1533), 1035 states have internal predecessors, (1533), 162 states have call successors, (162), 60 states have call predecessors, (162), 60 states have return successors, (244), 155 states have call predecessors, (244), 162 states have call successors, (244) [2021-11-21 00:50:40,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1939 transitions. [2021-11-21 00:50:40,513 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1939 transitions. Word has length 61 [2021-11-21 00:50:40,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:50:40,515 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 1939 transitions. [2021-11-21 00:50:40,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:50:40,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1939 transitions. [2021-11-21 00:50:40,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-21 00:50:40,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:40,524 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:50:40,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:50:40,524 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:50:40,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:40,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1858573189, now seen corresponding path program 1 times [2021-11-21 00:50:40,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:50:40,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404194280] [2021-11-21 00:50:40,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:40,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:50:40,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:40,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:50:40,640 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:50:40,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404194280] [2021-11-21 00:50:40,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404194280] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:50:40,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:50:40,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:50:40,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294434969] [2021-11-21 00:50:40,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:50:40,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:50:40,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:50:40,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:50:40,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:50:40,642 INFO L87 Difference]: Start difference. First operand 1250 states and 1939 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:50:41,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:50:41,341 INFO L93 Difference]: Finished difference Result 4923 states and 7865 transitions. [2021-11-21 00:50:41,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:50:41,342 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2021-11-21 00:50:41,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:50:41,375 INFO L225 Difference]: With dead ends: 4923 [2021-11-21 00:50:41,375 INFO L226 Difference]: Without dead ends: 3678 [2021-11-21 00:50:41,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:50:41,385 INFO L933 BasicCegarLoop]: 399 mSDtfsCounter, 943 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 949 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:50:41,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [949 Valid, 816 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 00:50:41,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3678 states. [2021-11-21 00:50:41,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3678 to 3416. [2021-11-21 00:50:41,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3416 states, 2875 states have (on average 1.5057391304347827) internal successors, (4329), 2849 states have internal predecessors, (4329), 376 states have call successors, (376), 148 states have call predecessors, (376), 164 states have return successors, (726), 419 states have call predecessors, (726), 376 states have call successors, (726) [2021-11-21 00:50:41,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3416 states to 3416 states and 5431 transitions. [2021-11-21 00:50:41,643 INFO L78 Accepts]: Start accepts. Automaton has 3416 states and 5431 transitions. Word has length 61 [2021-11-21 00:50:41,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:50:41,643 INFO L470 AbstractCegarLoop]: Abstraction has 3416 states and 5431 transitions. [2021-11-21 00:50:41,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:50:41,644 INFO L276 IsEmpty]: Start isEmpty. Operand 3416 states and 5431 transitions. [2021-11-21 00:50:41,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-21 00:50:41,645 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:41,646 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:50:41,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:50:41,646 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:50:41,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:41,647 INFO L85 PathProgramCache]: Analyzing trace with hash 280879706, now seen corresponding path program 1 times [2021-11-21 00:50:41,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:50:41,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391482325] [2021-11-21 00:50:41,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:41,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:50:41,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:41,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:50:41,754 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:50:41,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391482325] [2021-11-21 00:50:41,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391482325] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:50:41,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:50:41,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:50:41,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811960116] [2021-11-21 00:50:41,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:50:41,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:50:41,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:50:41,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:50:41,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:50:41,759 INFO L87 Difference]: Start difference. First operand 3416 states and 5431 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:50:42,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:50:42,762 INFO L93 Difference]: Finished difference Result 12583 states and 20719 transitions. [2021-11-21 00:50:42,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:50:42,763 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2021-11-21 00:50:42,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:50:42,844 INFO L225 Difference]: With dead ends: 12583 [2021-11-21 00:50:42,844 INFO L226 Difference]: Without dead ends: 9172 [2021-11-21 00:50:42,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:50:42,864 INFO L933 BasicCegarLoop]: 413 mSDtfsCounter, 912 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:50:42,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [926 Valid, 850 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 00:50:42,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9172 states. [2021-11-21 00:50:43,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9172 to 8584. [2021-11-21 00:50:43,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8584 states, 7317 states have (on average 1.5176985103184366) internal successors, (11105), 7181 states have internal predecessors, (11105), 846 states have call successors, (846), 348 states have call predecessors, (846), 420 states have return successors, (2042), 1055 states have call predecessors, (2042), 846 states have call successors, (2042) [2021-11-21 00:50:43,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8584 states to 8584 states and 13993 transitions. [2021-11-21 00:50:43,646 INFO L78 Accepts]: Start accepts. Automaton has 8584 states and 13993 transitions. Word has length 61 [2021-11-21 00:50:43,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:50:43,647 INFO L470 AbstractCegarLoop]: Abstraction has 8584 states and 13993 transitions. [2021-11-21 00:50:43,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:50:43,647 INFO L276 IsEmpty]: Start isEmpty. Operand 8584 states and 13993 transitions. [2021-11-21 00:50:43,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-21 00:50:43,650 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:43,651 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:50:43,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:50:43,652 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:50:43,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:43,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1483936903, now seen corresponding path program 1 times [2021-11-21 00:50:43,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:50:43,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676167754] [2021-11-21 00:50:43,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:43,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:50:43,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:43,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:50:43,779 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:50:43,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676167754] [2021-11-21 00:50:43,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676167754] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:50:43,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:50:43,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:50:43,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321269119] [2021-11-21 00:50:43,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:50:43,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:50:43,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:50:43,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:50:43,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:50:43,789 INFO L87 Difference]: Start difference. First operand 8584 states and 13993 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:50:45,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:50:45,544 INFO L93 Difference]: Finished difference Result 30951 states and 52709 transitions. [2021-11-21 00:50:45,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:50:45,545 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2021-11-21 00:50:45,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:50:45,901 INFO L225 Difference]: With dead ends: 30951 [2021-11-21 00:50:45,901 INFO L226 Difference]: Without dead ends: 22372 [2021-11-21 00:50:45,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:50:45,976 INFO L933 BasicCegarLoop]: 427 mSDtfsCounter, 889 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:50:45,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [904 Valid, 877 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 00:50:46,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22372 states. [2021-11-21 00:50:47,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22372 to 21128. [2021-11-21 00:50:47,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21128 states, 18135 states have (on average 1.5316790736145576) internal successors, (27777), 17669 states have internal predecessors, (27777), 1916 states have call successors, (1916), 820 states have call predecessors, (1916), 1076 states have return successors, (5710), 2639 states have call predecessors, (5710), 1916 states have call successors, (5710) [2021-11-21 00:50:47,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21128 states to 21128 states and 35403 transitions. [2021-11-21 00:50:47,946 INFO L78 Accepts]: Start accepts. Automaton has 21128 states and 35403 transitions. Word has length 61 [2021-11-21 00:50:47,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:50:47,947 INFO L470 AbstractCegarLoop]: Abstraction has 21128 states and 35403 transitions. [2021-11-21 00:50:47,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:50:47,948 INFO L276 IsEmpty]: Start isEmpty. Operand 21128 states and 35403 transitions. [2021-11-21 00:50:47,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-21 00:50:47,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:47,951 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:50:47,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:50:47,952 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:50:47,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:47,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1541081128, now seen corresponding path program 1 times [2021-11-21 00:50:47,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:50:47,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113050808] [2021-11-21 00:50:47,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:47,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:50:47,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:48,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:50:48,075 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:50:48,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113050808] [2021-11-21 00:50:48,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113050808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:50:48,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:50:48,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:50:48,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403681362] [2021-11-21 00:50:48,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:50:48,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:50:48,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:50:48,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:50:48,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:50:48,078 INFO L87 Difference]: Start difference. First operand 21128 states and 35403 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:50:50,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:50:50,490 INFO L93 Difference]: Finished difference Result 60276 states and 101252 transitions. [2021-11-21 00:50:50,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:50:50,491 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2021-11-21 00:50:50,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:50:50,737 INFO L225 Difference]: With dead ends: 60276 [2021-11-21 00:50:50,737 INFO L226 Difference]: Without dead ends: 39154 [2021-11-21 00:50:50,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:50:50,821 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 772 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:50:50,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [779 Valid, 512 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:50:50,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39154 states. [2021-11-21 00:50:53,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39154 to 34038. [2021-11-21 00:50:53,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34038 states, 29329 states have (on average 1.5137236182617886) internal successors, (44396), 28702 states have internal predecessors, (44396), 2872 states have call successors, (2872), 1324 states have call predecessors, (2872), 1836 states have return successors, (8563), 4012 states have call predecessors, (8563), 2872 states have call successors, (8563) [2021-11-21 00:50:53,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34038 states to 34038 states and 55831 transitions. [2021-11-21 00:50:53,506 INFO L78 Accepts]: Start accepts. Automaton has 34038 states and 55831 transitions. Word has length 61 [2021-11-21 00:50:53,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:50:53,509 INFO L470 AbstractCegarLoop]: Abstraction has 34038 states and 55831 transitions. [2021-11-21 00:50:53,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:50:53,510 INFO L276 IsEmpty]: Start isEmpty. Operand 34038 states and 55831 transitions. [2021-11-21 00:50:53,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-21 00:50:53,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:53,511 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:50:53,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 00:50:53,512 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:50:53,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:53,513 INFO L85 PathProgramCache]: Analyzing trace with hash 479655206, now seen corresponding path program 1 times [2021-11-21 00:50:53,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:50:53,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240600770] [2021-11-21 00:50:53,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:53,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:50:53,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:50:53,640 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:50:53,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240600770] [2021-11-21 00:50:53,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240600770] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:50:53,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:50:53,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:50:53,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566109747] [2021-11-21 00:50:53,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:50:53,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:50:53,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:50:53,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:50:53,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:50:53,644 INFO L87 Difference]: Start difference. First operand 34038 states and 55831 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:50:56,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:50:56,667 INFO L93 Difference]: Finished difference Result 107960 states and 176708 transitions. [2021-11-21 00:50:56,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:50:56,667 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 62 [2021-11-21 00:50:56,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:50:57,141 INFO L225 Difference]: With dead ends: 107960 [2021-11-21 00:50:57,142 INFO L226 Difference]: Without dead ends: 73928 [2021-11-21 00:50:57,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:50:57,405 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 696 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:50:57,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [709 Valid, 525 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:50:57,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73928 states. [2021-11-21 00:51:01,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73928 to 62078. [2021-11-21 00:51:01,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62078 states, 53625 states have (on average 1.5112913752913752) internal successors, (81043), 52318 states have internal predecessors, (81043), 5068 states have call successors, (5068), 2348 states have call predecessors, (5068), 3384 states have return successors, (16046), 7412 states have call predecessors, (16046), 5068 states have call successors, (16046) [2021-11-21 00:51:01,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62078 states to 62078 states and 102157 transitions. [2021-11-21 00:51:01,407 INFO L78 Accepts]: Start accepts. Automaton has 62078 states and 102157 transitions. Word has length 62 [2021-11-21 00:51:01,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:51:01,408 INFO L470 AbstractCegarLoop]: Abstraction has 62078 states and 102157 transitions. [2021-11-21 00:51:01,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:51:01,408 INFO L276 IsEmpty]: Start isEmpty. Operand 62078 states and 102157 transitions. [2021-11-21 00:51:01,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-21 00:51:01,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:51:01,411 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:51:01,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 00:51:01,411 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:51:01,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:51:01,413 INFO L85 PathProgramCache]: Analyzing trace with hash 538184111, now seen corresponding path program 1 times [2021-11-21 00:51:01,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:51:01,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495484440] [2021-11-21 00:51:01,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:51:01,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:51:01,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:51:01,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:51:01,527 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:51:01,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495484440] [2021-11-21 00:51:01,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495484440] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:51:01,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:51:01,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:51:01,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914042589] [2021-11-21 00:51:01,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:51:01,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:51:01,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:51:01,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:51:01,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:51:01,530 INFO L87 Difference]: Start difference. First operand 62078 states and 102157 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:51:06,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:51:06,884 INFO L93 Difference]: Finished difference Result 175423 states and 294597 transitions. [2021-11-21 00:51:06,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:51:06,891 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 63 [2021-11-21 00:51:06,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:51:07,904 INFO L225 Difference]: With dead ends: 175423 [2021-11-21 00:51:07,905 INFO L226 Difference]: Without dead ends: 113351 [2021-11-21 00:51:08,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:51:08,114 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 641 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:51:08,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 555 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 00:51:08,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113351 states. [2021-11-21 00:51:13,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113351 to 97221. [2021-11-21 00:51:13,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97221 states, 83995 states have (on average 1.5123162092981726) internal successors, (127027), 82458 states have internal predecessors, (127027), 8053 states have call successors, (8053), 3832 states have call predecessors, (8053), 5172 states have return successors, (25856), 10931 states have call predecessors, (25856), 8053 states have call successors, (25856) [2021-11-21 00:51:14,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97221 states to 97221 states and 160936 transitions. [2021-11-21 00:51:14,340 INFO L78 Accepts]: Start accepts. Automaton has 97221 states and 160936 transitions. Word has length 63 [2021-11-21 00:51:14,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:51:14,341 INFO L470 AbstractCegarLoop]: Abstraction has 97221 states and 160936 transitions. [2021-11-21 00:51:14,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:51:14,341 INFO L276 IsEmpty]: Start isEmpty. Operand 97221 states and 160936 transitions. [2021-11-21 00:51:14,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-21 00:51:14,347 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:51:14,347 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:51:14,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 00:51:14,348 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:51:14,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:51:14,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1792666306, now seen corresponding path program 1 times [2021-11-21 00:51:14,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:51:14,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136104955] [2021-11-21 00:51:14,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:51:14,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:51:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:51:14,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:51:14,565 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:51:14,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136104955] [2021-11-21 00:51:14,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136104955] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:51:14,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:51:14,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:51:14,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560430174] [2021-11-21 00:51:14,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:51:14,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:51:14,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:51:14,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:51:14,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:51:14,568 INFO L87 Difference]: Start difference. First operand 97221 states and 160936 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:51:22,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:51:22,248 INFO L93 Difference]: Finished difference Result 274040 states and 464348 transitions. [2021-11-21 00:51:22,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:51:22,249 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 64 [2021-11-21 00:51:22,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:51:23,317 INFO L225 Difference]: With dead ends: 274040 [2021-11-21 00:51:23,317 INFO L226 Difference]: Without dead ends: 176825 [2021-11-21 00:51:23,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:51:23,694 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 678 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:51:23,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 522 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:51:23,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176825 states.