./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0588115c-d787-4593-a56b-a566b046d3dc/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0588115c-d787-4593-a56b-a566b046d3dc/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0588115c-d787-4593-a56b-a566b046d3dc/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0588115c-d787-4593-a56b-a566b046d3dc/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0588115c-d787-4593-a56b-a566b046d3dc/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0588115c-d787-4593-a56b-a566b046d3dc/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f4eb782e6042aea0609a33229d26d2fc0e173871777f83d353b448b155d9fa10 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:30:53,730 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:30:53,733 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:30:53,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:30:53,803 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:30:53,805 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:30:53,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:30:53,810 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:30:53,813 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:30:53,814 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:30:53,816 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:30:53,818 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:30:53,819 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:30:53,820 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:30:53,823 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:30:53,825 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:30:53,826 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:30:53,828 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:30:53,831 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:30:53,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:30:53,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:30:53,839 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:30:53,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:30:53,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:30:53,847 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:30:53,848 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:30:53,849 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:30:53,850 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:30:53,851 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:30:53,853 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:30:53,853 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:30:53,855 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:30:53,856 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:30:53,857 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:30:53,859 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:30:53,859 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:30:53,860 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:30:53,861 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:30:53,861 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:30:53,862 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:30:53,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:30:53,864 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0588115c-d787-4593-a56b-a566b046d3dc/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:30:53,905 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:30:53,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:30:53,906 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:30:53,907 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:30:53,915 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:30:53,916 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:30:53,916 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:30:53,916 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:30:53,916 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:30:53,917 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:30:53,918 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:30:53,918 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:30:53,919 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:30:53,919 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:30:53,919 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:30:53,920 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:30:53,920 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:30:53,920 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:30:53,921 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:30:53,922 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:30:53,922 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:30:53,922 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:30:53,922 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:30:53,923 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:30:53,923 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:30:53,923 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:30:53,923 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:30:53,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:30:53,924 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:30:53,924 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:30:53,925 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:30:53,925 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:30:53,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:30:53,926 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:30:53,926 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:30:53,926 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:30:53,927 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:30:53,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:30:53,927 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:30:53,927 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:30:53,928 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:30:53,928 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_0588115c-d787-4593-a56b-a566b046d3dc/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0588115c-d787-4593-a56b-a566b046d3dc/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4eb782e6042aea0609a33229d26d2fc0e173871777f83d353b448b155d9fa10 [2021-11-23 03:30:54,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:30:54,283 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:30:54,286 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:30:54,288 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:30:54,288 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:30:54,290 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0588115c-d787-4593-a56b-a566b046d3dc/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c [2021-11-23 03:30:54,400 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0588115c-d787-4593-a56b-a566b046d3dc/bin/utaipan-EQgc7hIp5V/data/8ea0fc0e4/a186e3a2fde34834902e2b0d3dad4d21/FLAG39c92d081 [2021-11-23 03:30:55,218 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:30:55,219 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0588115c-d787-4593-a56b-a566b046d3dc/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c [2021-11-23 03:30:55,247 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0588115c-d787-4593-a56b-a566b046d3dc/bin/utaipan-EQgc7hIp5V/data/8ea0fc0e4/a186e3a2fde34834902e2b0d3dad4d21/FLAG39c92d081 [2021-11-23 03:30:55,333 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0588115c-d787-4593-a56b-a566b046d3dc/bin/utaipan-EQgc7hIp5V/data/8ea0fc0e4/a186e3a2fde34834902e2b0d3dad4d21 [2021-11-23 03:30:55,339 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:30:55,342 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:30:55,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:30:55,348 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:30:55,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:30:55,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:30:55" (1/1) ... [2021-11-23 03:30:55,356 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@753530b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:55, skipping insertion in model container [2021-11-23 03:30:55,357 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:30:55" (1/1) ... [2021-11-23 03:30:55,368 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:30:55,571 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:30:56,384 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_0588115c-d787-4593-a56b-a566b046d3dc/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c[30249,30262] [2021-11-23 03:30:56,503 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_0588115c-d787-4593-a56b-a566b046d3dc/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c[33700,33713] [2021-11-23 03:30:56,866 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:30:56,895 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:30:57,286 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_0588115c-d787-4593-a56b-a566b046d3dc/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c[30249,30262] [2021-11-23 03:30:57,388 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_0588115c-d787-4593-a56b-a566b046d3dc/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c[33700,33713] [2021-11-23 03:30:57,707 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:30:57,735 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:30:57,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:57 WrapperNode [2021-11-23 03:30:57,736 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:30:57,738 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:30:57,738 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:30:57,739 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:30:57,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:57" (1/1) ... [2021-11-23 03:30:57,801 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:57" (1/1) ... [2021-11-23 03:30:57,945 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 3743 [2021-11-23 03:30:57,946 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:30:57,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:30:57,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:30:57,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:30:57,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:57" (1/1) ... [2021-11-23 03:30:57,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:57" (1/1) ... [2021-11-23 03:30:57,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:57" (1/1) ... [2021-11-23 03:30:57,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:57" (1/1) ... [2021-11-23 03:30:58,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:57" (1/1) ... [2021-11-23 03:30:58,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:57" (1/1) ... [2021-11-23 03:30:58,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:57" (1/1) ... [2021-11-23 03:30:58,130 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:30:58,131 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:30:58,131 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:30:58,132 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:30:58,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:57" (1/1) ... [2021-11-23 03:30:58,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:30:58,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0588115c-d787-4593-a56b-a566b046d3dc/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:30:58,180 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0588115c-d787-4593-a56b-a566b046d3dc/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:30:58,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0588115c-d787-4593-a56b-a566b046d3dc/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:30:58,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:30:58,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:30:58,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:30:58,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:30:58,552 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:30:58,555 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:31:01,845 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:31:03,600 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:31:03,601 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 03:31:03,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:31:03 BoogieIcfgContainer [2021-11-23 03:31:03,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:31:03,613 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:31:03,613 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:31:03,617 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:31:03,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:30:55" (1/3) ... [2021-11-23 03:31:03,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79da4cfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:31:03, skipping insertion in model container [2021-11-23 03:31:03,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:57" (2/3) ... [2021-11-23 03:31:03,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79da4cfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:31:03, skipping insertion in model container [2021-11-23 03:31:03,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:31:03" (3/3) ... [2021-11-23 03:31:03,622 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c [2021-11-23 03:31:03,633 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:31:03,633 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 03:31:03,721 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:31:03,735 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:31:03,736 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 03:31:03,793 INFO L276 IsEmpty]: Start isEmpty. Operand has 745 states, 742 states have (on average 1.6388140161725067) internal successors, (1216), 744 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:03,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-23 03:31:03,858 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:03,859 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:31:03,860 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:03,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:03,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1674305928, now seen corresponding path program 1 times [2021-11-23 03:31:03,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:03,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837859264] [2021-11-23 03:31:03,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:03,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:04,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:04,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:31:04,744 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:04,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837859264] [2021-11-23 03:31:04,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837859264] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:04,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:04,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:31:04,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758742561] [2021-11-23 03:31:04,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:04,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:31:04,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:04,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:31:04,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:04,827 INFO L87 Difference]: Start difference. First operand has 745 states, 742 states have (on average 1.6388140161725067) internal successors, (1216), 744 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:05,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:05,701 INFO L93 Difference]: Finished difference Result 1782 states and 2917 transitions. [2021-11-23 03:31:05,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:31:05,704 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-11-23 03:31:05,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:05,741 INFO L225 Difference]: With dead ends: 1782 [2021-11-23 03:31:05,741 INFO L226 Difference]: Without dead ends: 1172 [2021-11-23 03:31:05,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:05,761 INFO L933 BasicCegarLoop]: 1481 mSDtfsCounter, 1772 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1772 SdHoareTripleChecker+Valid, 2415 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:05,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1772 Valid, 2415 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 03:31:05,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-11-23 03:31:05,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1168. [2021-11-23 03:31:05,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1166 states have (on average 1.620926243567753) internal successors, (1890), 1167 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:05,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1890 transitions. [2021-11-23 03:31:05,945 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1890 transitions. Word has length 105 [2021-11-23 03:31:05,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:05,946 INFO L470 AbstractCegarLoop]: Abstraction has 1168 states and 1890 transitions. [2021-11-23 03:31:05,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:05,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1890 transitions. [2021-11-23 03:31:05,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-23 03:31:05,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:05,955 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:31:05,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:31:05,956 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:05,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:05,957 INFO L85 PathProgramCache]: Analyzing trace with hash 242166310, now seen corresponding path program 1 times [2021-11-23 03:31:05,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:05,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493409566] [2021-11-23 03:31:05,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:05,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:06,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:31:06,158 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:06,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493409566] [2021-11-23 03:31:06,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493409566] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:06,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:06,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:31:06,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397695618] [2021-11-23 03:31:06,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:06,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:31:06,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:06,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:31:06,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:06,163 INFO L87 Difference]: Start difference. First operand 1168 states and 1890 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:06,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:06,842 INFO L93 Difference]: Finished difference Result 2632 states and 4261 transitions. [2021-11-23 03:31:06,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:31:06,843 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-23 03:31:06,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:06,856 INFO L225 Difference]: With dead ends: 2632 [2021-11-23 03:31:06,856 INFO L226 Difference]: Without dead ends: 1604 [2021-11-23 03:31:06,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:06,861 INFO L933 BasicCegarLoop]: 1872 mSDtfsCounter, 957 mSDsluCounter, 1924 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 3712 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:06,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [957 Valid, 3712 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 03:31:06,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-11-23 03:31:06,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1600. [2021-11-23 03:31:06,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1598 states have (on average 1.6038798498122653) internal successors, (2563), 1599 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:06,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 2563 transitions. [2021-11-23 03:31:06,952 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 2563 transitions. Word has length 111 [2021-11-23 03:31:06,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:06,953 INFO L470 AbstractCegarLoop]: Abstraction has 1600 states and 2563 transitions. [2021-11-23 03:31:06,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:06,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 2563 transitions. [2021-11-23 03:31:06,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-23 03:31:06,959 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:06,960 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:31:06,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:31:06,968 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:06,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:06,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1701906779, now seen corresponding path program 1 times [2021-11-23 03:31:06,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:06,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614606724] [2021-11-23 03:31:06,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:06,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:07,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:31:07,312 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:07,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614606724] [2021-11-23 03:31:07,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614606724] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:07,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:07,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:31:07,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153410236] [2021-11-23 03:31:07,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:07,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:31:07,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:07,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:31:07,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:07,316 INFO L87 Difference]: Start difference. First operand 1600 states and 2563 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:07,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:07,839 INFO L93 Difference]: Finished difference Result 4122 states and 6616 transitions. [2021-11-23 03:31:07,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:31:07,840 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-23 03:31:07,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:07,859 INFO L225 Difference]: With dead ends: 4122 [2021-11-23 03:31:07,860 INFO L226 Difference]: Without dead ends: 2681 [2021-11-23 03:31:07,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:07,871 INFO L933 BasicCegarLoop]: 1125 mSDtfsCounter, 875 mSDsluCounter, 1904 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 2927 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:07,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [875 Valid, 2927 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:31:07,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2681 states. [2021-11-23 03:31:08,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2681 to 2677. [2021-11-23 03:31:08,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2677 states, 2675 states have (on average 1.6022429906542055) internal successors, (4286), 2676 states have internal predecessors, (4286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:08,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2677 states to 2677 states and 4286 transitions. [2021-11-23 03:31:08,039 INFO L78 Accepts]: Start accepts. Automaton has 2677 states and 4286 transitions. Word has length 114 [2021-11-23 03:31:08,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:08,040 INFO L470 AbstractCegarLoop]: Abstraction has 2677 states and 4286 transitions. [2021-11-23 03:31:08,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:08,041 INFO L276 IsEmpty]: Start isEmpty. Operand 2677 states and 4286 transitions. [2021-11-23 03:31:08,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-23 03:31:08,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:08,048 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:31:08,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:31:08,049 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:08,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:08,050 INFO L85 PathProgramCache]: Analyzing trace with hash -26102925, now seen corresponding path program 1 times [2021-11-23 03:31:08,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:08,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56967496] [2021-11-23 03:31:08,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:08,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:08,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:08,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:31:08,217 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:08,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56967496] [2021-11-23 03:31:08,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56967496] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:08,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:08,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:31:08,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224942554] [2021-11-23 03:31:08,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:08,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:31:08,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:08,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:31:08,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:08,222 INFO L87 Difference]: Start difference. First operand 2677 states and 4286 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:08,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:08,775 INFO L93 Difference]: Finished difference Result 6390 states and 10242 transitions. [2021-11-23 03:31:08,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:31:08,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-11-23 03:31:08,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:08,802 INFO L225 Difference]: With dead ends: 6390 [2021-11-23 03:31:08,802 INFO L226 Difference]: Without dead ends: 3871 [2021-11-23 03:31:08,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:08,817 INFO L933 BasicCegarLoop]: 1893 mSDtfsCounter, 984 mSDsluCounter, 1950 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 984 SdHoareTripleChecker+Valid, 3749 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:08,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [984 Valid, 3749 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:31:08,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3871 states. [2021-11-23 03:31:09,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3871 to 3867. [2021-11-23 03:31:09,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3867 states, 3865 states have (on average 1.6002587322121604) internal successors, (6185), 3866 states have internal predecessors, (6185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:09,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3867 states to 3867 states and 6185 transitions. [2021-11-23 03:31:09,100 INFO L78 Accepts]: Start accepts. Automaton has 3867 states and 6185 transitions. Word has length 120 [2021-11-23 03:31:09,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:09,100 INFO L470 AbstractCegarLoop]: Abstraction has 3867 states and 6185 transitions. [2021-11-23 03:31:09,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:09,101 INFO L276 IsEmpty]: Start isEmpty. Operand 3867 states and 6185 transitions. [2021-11-23 03:31:09,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-23 03:31:09,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:09,108 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:31:09,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:31:09,108 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:09,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:09,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1031686766, now seen corresponding path program 1 times [2021-11-23 03:31:09,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:09,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385566237] [2021-11-23 03:31:09,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:09,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:09,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:09,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:31:09,334 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:09,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385566237] [2021-11-23 03:31:09,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385566237] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:09,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:09,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:31:09,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352680177] [2021-11-23 03:31:09,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:09,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:31:09,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:09,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:31:09,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:09,336 INFO L87 Difference]: Start difference. First operand 3867 states and 6185 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:09,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:09,888 INFO L93 Difference]: Finished difference Result 10323 states and 16533 transitions. [2021-11-23 03:31:09,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:31:09,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-23 03:31:09,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:09,929 INFO L225 Difference]: With dead ends: 10323 [2021-11-23 03:31:09,929 INFO L226 Difference]: Without dead ends: 6633 [2021-11-23 03:31:09,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:09,938 INFO L933 BasicCegarLoop]: 1123 mSDtfsCounter, 1733 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1733 SdHoareTripleChecker+Valid, 1989 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:09,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1733 Valid, 1989 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:31:09,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6633 states. [2021-11-23 03:31:10,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6633 to 6629. [2021-11-23 03:31:10,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6629 states, 6627 states have (on average 1.5961973743775464) internal successors, (10578), 6628 states have internal predecessors, (10578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:10,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6629 states to 6629 states and 10578 transitions. [2021-11-23 03:31:10,344 INFO L78 Accepts]: Start accepts. Automaton has 6629 states and 10578 transitions. Word has length 123 [2021-11-23 03:31:10,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:10,345 INFO L470 AbstractCegarLoop]: Abstraction has 6629 states and 10578 transitions. [2021-11-23 03:31:10,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:10,347 INFO L276 IsEmpty]: Start isEmpty. Operand 6629 states and 10578 transitions. [2021-11-23 03:31:10,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-23 03:31:10,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:10,360 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:31:10,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:31:10,360 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:10,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:10,361 INFO L85 PathProgramCache]: Analyzing trace with hash -388778377, now seen corresponding path program 1 times [2021-11-23 03:31:10,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:10,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991150501] [2021-11-23 03:31:10,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:10,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:10,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:31:10,517 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:10,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991150501] [2021-11-23 03:31:10,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991150501] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:10,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:10,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:31:10,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057590092] [2021-11-23 03:31:10,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:10,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:31:10,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:10,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:31:10,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:10,519 INFO L87 Difference]: Start difference. First operand 6629 states and 10578 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:11,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:11,223 INFO L93 Difference]: Finished difference Result 16290 states and 26024 transitions. [2021-11-23 03:31:11,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:31:11,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-11-23 03:31:11,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:11,297 INFO L225 Difference]: With dead ends: 16290 [2021-11-23 03:31:11,298 INFO L226 Difference]: Without dead ends: 9837 [2021-11-23 03:31:11,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:11,309 INFO L933 BasicCegarLoop]: 1863 mSDtfsCounter, 1948 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1948 SdHoareTripleChecker+Valid, 2758 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:11,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1948 Valid, 2758 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:31:11,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9837 states. [2021-11-23 03:31:11,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9837 to 9833. [2021-11-23 03:31:11,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9833 states, 9831 states have (on average 1.5939375445020851) internal successors, (15670), 9832 states have internal predecessors, (15670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:11,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9833 states to 9833 states and 15670 transitions. [2021-11-23 03:31:11,812 INFO L78 Accepts]: Start accepts. Automaton has 9833 states and 15670 transitions. Word has length 129 [2021-11-23 03:31:11,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:11,813 INFO L470 AbstractCegarLoop]: Abstraction has 9833 states and 15670 transitions. [2021-11-23 03:31:11,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:11,814 INFO L276 IsEmpty]: Start isEmpty. Operand 9833 states and 15670 transitions. [2021-11-23 03:31:11,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-23 03:31:11,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:11,828 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:31:11,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:31:11,828 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:11,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:11,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1809417986, now seen corresponding path program 1 times [2021-11-23 03:31:11,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:11,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179165177] [2021-11-23 03:31:11,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:11,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:11,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:12,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:31:12,034 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:12,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179165177] [2021-11-23 03:31:12,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179165177] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:12,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:12,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:31:12,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583508429] [2021-11-23 03:31:12,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:12,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:31:12,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:12,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:31:12,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:12,037 INFO L87 Difference]: Start difference. First operand 9833 states and 15670 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:13,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:13,050 INFO L93 Difference]: Finished difference Result 26529 states and 42305 transitions. [2021-11-23 03:31:13,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:31:13,051 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-23 03:31:13,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:13,106 INFO L225 Difference]: With dead ends: 26529 [2021-11-23 03:31:13,106 INFO L226 Difference]: Without dead ends: 16891 [2021-11-23 03:31:13,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:13,131 INFO L933 BasicCegarLoop]: 1121 mSDtfsCounter, 1723 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1723 SdHoareTripleChecker+Valid, 1958 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:13,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1723 Valid, 1958 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:31:13,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16891 states. [2021-11-23 03:31:14,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16891 to 16887. [2021-11-23 03:31:14,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16887 states, 16885 states have (on average 1.58732602901984) internal successors, (26802), 16886 states have internal predecessors, (26802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:14,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16887 states to 16887 states and 26802 transitions. [2021-11-23 03:31:14,090 INFO L78 Accepts]: Start accepts. Automaton has 16887 states and 26802 transitions. Word has length 132 [2021-11-23 03:31:14,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:14,091 INFO L470 AbstractCegarLoop]: Abstraction has 16887 states and 26802 transitions. [2021-11-23 03:31:14,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:14,091 INFO L276 IsEmpty]: Start isEmpty. Operand 16887 states and 26802 transitions. [2021-11-23 03:31:14,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-23 03:31:14,114 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:14,115 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:31:14,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:31:14,115 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:14,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:14,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1711558555, now seen corresponding path program 1 times [2021-11-23 03:31:14,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:14,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288089683] [2021-11-23 03:31:14,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:14,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:14,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:14,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:31:14,239 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:14,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288089683] [2021-11-23 03:31:14,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288089683] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:14,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:14,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:31:14,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602716639] [2021-11-23 03:31:14,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:14,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:31:14,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:14,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:31:14,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:14,242 INFO L87 Difference]: Start difference. First operand 16887 states and 26802 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:15,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:15,575 INFO L93 Difference]: Finished difference Result 42098 states and 66902 transitions. [2021-11-23 03:31:15,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:31:15,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-11-23 03:31:15,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:15,656 INFO L225 Difference]: With dead ends: 42098 [2021-11-23 03:31:15,657 INFO L226 Difference]: Without dead ends: 25405 [2021-11-23 03:31:15,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:15,689 INFO L933 BasicCegarLoop]: 1833 mSDtfsCounter, 978 mSDsluCounter, 1834 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 978 SdHoareTripleChecker+Valid, 3577 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:15,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [978 Valid, 3577 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:31:15,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25405 states. [2021-11-23 03:31:16,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25405 to 25401. [2021-11-23 03:31:17,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25401 states, 25399 states have (on average 1.5849836607740462) internal successors, (40257), 25400 states have internal predecessors, (40257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:17,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25401 states to 25401 states and 40257 transitions. [2021-11-23 03:31:17,118 INFO L78 Accepts]: Start accepts. Automaton has 25401 states and 40257 transitions. Word has length 138 [2021-11-23 03:31:17,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:17,119 INFO L470 AbstractCegarLoop]: Abstraction has 25401 states and 40257 transitions. [2021-11-23 03:31:17,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:17,119 INFO L276 IsEmpty]: Start isEmpty. Operand 25401 states and 40257 transitions. [2021-11-23 03:31:17,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-23 03:31:17,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:17,152 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:31:17,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 03:31:17,153 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:17,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:17,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1867205292, now seen corresponding path program 1 times [2021-11-23 03:31:17,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:17,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333488498] [2021-11-23 03:31:17,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:17,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:17,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:17,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:31:17,271 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:17,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333488498] [2021-11-23 03:31:17,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333488498] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:17,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:17,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:31:17,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041653943] [2021-11-23 03:31:17,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:17,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:31:17,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:17,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:31:17,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:17,273 INFO L87 Difference]: Start difference. First operand 25401 states and 40257 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:19,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:19,594 INFO L93 Difference]: Finished difference Result 64246 states and 101503 transitions. [2021-11-23 03:31:19,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:31:19,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-23 03:31:19,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:19,762 INFO L225 Difference]: With dead ends: 64246 [2021-11-23 03:31:19,762 INFO L226 Difference]: Without dead ends: 39052 [2021-11-23 03:31:19,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:19,817 INFO L933 BasicCegarLoop]: 1829 mSDtfsCounter, 945 mSDsluCounter, 1818 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 3587 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:19,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [945 Valid, 3587 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 03:31:19,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39052 states. [2021-11-23 03:31:21,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39052 to 39048. [2021-11-23 03:31:22,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39048 states, 39046 states have (on average 1.5675357270911232) internal successors, (61206), 39047 states have internal predecessors, (61206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:22,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39048 states to 39048 states and 61206 transitions. [2021-11-23 03:31:22,122 INFO L78 Accepts]: Start accepts. Automaton has 39048 states and 61206 transitions. Word has length 141 [2021-11-23 03:31:22,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:22,122 INFO L470 AbstractCegarLoop]: Abstraction has 39048 states and 61206 transitions. [2021-11-23 03:31:22,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:22,123 INFO L276 IsEmpty]: Start isEmpty. Operand 39048 states and 61206 transitions. [2021-11-23 03:31:22,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-23 03:31:22,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:22,379 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:31:22,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 03:31:22,380 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:22,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:22,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1176593850, now seen corresponding path program 1 times [2021-11-23 03:31:22,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:22,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489869688] [2021-11-23 03:31:22,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:22,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:22,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:22,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:31:22,556 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:22,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489869688] [2021-11-23 03:31:22,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489869688] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:22,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:22,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:31:22,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957093443] [2021-11-23 03:31:22,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:22,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:31:22,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:22,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:31:22,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:22,559 INFO L87 Difference]: Start difference. First operand 39048 states and 61206 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:24,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:24,759 INFO L93 Difference]: Finished difference Result 77893 states and 122093 transitions. [2021-11-23 03:31:24,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:31:24,760 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-11-23 03:31:24,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:24,889 INFO L225 Difference]: With dead ends: 77893 [2021-11-23 03:31:24,889 INFO L226 Difference]: Without dead ends: 39052 [2021-11-23 03:31:24,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:24,964 INFO L933 BasicCegarLoop]: 1835 mSDtfsCounter, 1853 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1853 SdHoareTripleChecker+Valid, 2733 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:24,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1853 Valid, 2733 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:31:25,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39052 states. [2021-11-23 03:31:26,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39052 to 39048. [2021-11-23 03:31:26,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39048 states, 39046 states have (on average 1.562951390667418) internal successors, (61027), 39047 states have internal predecessors, (61027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:26,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39048 states to 39048 states and 61027 transitions. [2021-11-23 03:31:26,931 INFO L78 Accepts]: Start accepts. Automaton has 39048 states and 61027 transitions. Word has length 142 [2021-11-23 03:31:26,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:26,932 INFO L470 AbstractCegarLoop]: Abstraction has 39048 states and 61027 transitions. [2021-11-23 03:31:26,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:26,932 INFO L276 IsEmpty]: Start isEmpty. Operand 39048 states and 61027 transitions. [2021-11-23 03:31:27,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-23 03:31:27,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:27,014 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:31:27,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 03:31:27,015 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:27,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:27,016 INFO L85 PathProgramCache]: Analyzing trace with hash 761269293, now seen corresponding path program 1 times [2021-11-23 03:31:27,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:27,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127781886] [2021-11-23 03:31:27,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:27,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:27,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:27,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:31:27,162 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:27,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127781886] [2021-11-23 03:31:27,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127781886] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:27,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:27,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:31:27,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552176201] [2021-11-23 03:31:27,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:27,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:31:27,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:27,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:31:27,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:27,165 INFO L87 Difference]: Start difference. First operand 39048 states and 61027 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:29,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:29,262 INFO L93 Difference]: Finished difference Result 77893 states and 121736 transitions. [2021-11-23 03:31:29,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:31:29,263 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-23 03:31:29,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:29,477 INFO L225 Difference]: With dead ends: 77893 [2021-11-23 03:31:29,477 INFO L226 Difference]: Without dead ends: 39052 [2021-11-23 03:31:29,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:29,527 INFO L933 BasicCegarLoop]: 1825 mSDtfsCounter, 1910 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1910 SdHoareTripleChecker+Valid, 2696 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:29,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1910 Valid, 2696 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:31:29,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39052 states. [2021-11-23 03:31:31,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39052 to 39048. [2021-11-23 03:31:31,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39048 states, 39046 states have (on average 1.5583670542437125) internal successors, (60848), 39047 states have internal predecessors, (60848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:31,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39048 states to 39048 states and 60848 transitions. [2021-11-23 03:31:31,572 INFO L78 Accepts]: Start accepts. Automaton has 39048 states and 60848 transitions. Word has length 143 [2021-11-23 03:31:31,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:31,575 INFO L470 AbstractCegarLoop]: Abstraction has 39048 states and 60848 transitions. [2021-11-23 03:31:31,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:31,575 INFO L276 IsEmpty]: Start isEmpty. Operand 39048 states and 60848 transitions. [2021-11-23 03:31:31,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-23 03:31:31,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:31,612 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:31:31,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 03:31:31,613 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:31,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:31,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1585737793, now seen corresponding path program 1 times [2021-11-23 03:31:31,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:31,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339905590] [2021-11-23 03:31:31,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:31,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:31,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:31,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:31:31,771 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:31,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339905590] [2021-11-23 03:31:31,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339905590] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:31,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:31,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:31:31,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470121695] [2021-11-23 03:31:31,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:31,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:31:31,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:31,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:31:31,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:31,774 INFO L87 Difference]: Start difference. First operand 39048 states and 60848 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:33,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:33,771 INFO L93 Difference]: Finished difference Result 77893 states and 121379 transitions. [2021-11-23 03:31:33,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:31:33,772 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-11-23 03:31:33,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:33,841 INFO L225 Difference]: With dead ends: 77893 [2021-11-23 03:31:33,842 INFO L226 Difference]: Without dead ends: 39052 [2021-11-23 03:31:33,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:33,881 INFO L933 BasicCegarLoop]: 1797 mSDtfsCounter, 1907 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1907 SdHoareTripleChecker+Valid, 2641 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:33,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1907 Valid, 2641 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:31:33,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39052 states. [2021-11-23 03:31:35,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39052 to 39048. [2021-11-23 03:31:35,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39048 states, 39046 states have (on average 1.5537827178200072) internal successors, (60669), 39047 states have internal predecessors, (60669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:35,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39048 states to 39048 states and 60669 transitions. [2021-11-23 03:31:35,682 INFO L78 Accepts]: Start accepts. Automaton has 39048 states and 60669 transitions. Word has length 144 [2021-11-23 03:31:35,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:35,682 INFO L470 AbstractCegarLoop]: Abstraction has 39048 states and 60669 transitions. [2021-11-23 03:31:35,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:35,683 INFO L276 IsEmpty]: Start isEmpty. Operand 39048 states and 60669 transitions. [2021-11-23 03:31:35,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-23 03:31:35,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:35,706 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:31:35,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 03:31:35,707 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:35,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:35,707 INFO L85 PathProgramCache]: Analyzing trace with hash 675231494, now seen corresponding path program 1 times [2021-11-23 03:31:35,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:35,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441791081] [2021-11-23 03:31:35,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:35,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:35,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:35,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:31:35,831 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:35,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441791081] [2021-11-23 03:31:35,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441791081] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:35,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:35,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:31:35,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341292893] [2021-11-23 03:31:35,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:35,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:31:35,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:35,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:31:35,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:35,834 INFO L87 Difference]: Start difference. First operand 39048 states and 60669 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:37,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:37,921 INFO L93 Difference]: Finished difference Result 77893 states and 121022 transitions. [2021-11-23 03:31:37,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:31:37,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-11-23 03:31:37,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:37,990 INFO L225 Difference]: With dead ends: 77893 [2021-11-23 03:31:37,990 INFO L226 Difference]: Without dead ends: 39052 [2021-11-23 03:31:38,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:38,026 INFO L933 BasicCegarLoop]: 1769 mSDtfsCounter, 967 mSDsluCounter, 1722 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 967 SdHoareTripleChecker+Valid, 3413 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:38,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [967 Valid, 3413 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 03:31:38,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39052 states. [2021-11-23 03:31:39,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39052 to 39048. [2021-11-23 03:31:39,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39048 states, 39046 states have (on average 1.5491983813963017) internal successors, (60490), 39047 states have internal predecessors, (60490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:39,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39048 states to 39048 states and 60490 transitions. [2021-11-23 03:31:39,964 INFO L78 Accepts]: Start accepts. Automaton has 39048 states and 60490 transitions. Word has length 145 [2021-11-23 03:31:39,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:39,965 INFO L470 AbstractCegarLoop]: Abstraction has 39048 states and 60490 transitions. [2021-11-23 03:31:39,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:39,965 INFO L276 IsEmpty]: Start isEmpty. Operand 39048 states and 60490 transitions. [2021-11-23 03:31:39,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-23 03:31:39,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:39,996 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:31:39,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 03:31:39,996 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:39,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:39,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1750127981, now seen corresponding path program 1 times [2021-11-23 03:31:39,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:39,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166802028] [2021-11-23 03:31:39,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:39,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:40,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:40,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:31:40,153 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:40,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166802028] [2021-11-23 03:31:40,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166802028] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:40,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:40,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:31:40,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77614552] [2021-11-23 03:31:40,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:40,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:31:40,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:40,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:31:40,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:40,156 INFO L87 Difference]: Start difference. First operand 39048 states and 60490 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:42,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:42,347 INFO L93 Difference]: Finished difference Result 77893 states and 120665 transitions. [2021-11-23 03:31:42,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:31:42,348 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-11-23 03:31:42,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:42,413 INFO L225 Difference]: With dead ends: 77893 [2021-11-23 03:31:42,413 INFO L226 Difference]: Without dead ends: 39052 [2021-11-23 03:31:42,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:42,447 INFO L933 BasicCegarLoop]: 1829 mSDtfsCounter, 930 mSDsluCounter, 1818 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 3587 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:42,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [930 Valid, 3587 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 03:31:42,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39052 states. [2021-11-23 03:31:44,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39052 to 39048. [2021-11-23 03:31:44,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39048 states, 39046 states have (on average 1.5470982943195206) internal successors, (60408), 39047 states have internal predecessors, (60408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:44,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39048 states to 39048 states and 60408 transitions. [2021-11-23 03:31:44,475 INFO L78 Accepts]: Start accepts. Automaton has 39048 states and 60408 transitions. Word has length 147 [2021-11-23 03:31:44,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:44,475 INFO L470 AbstractCegarLoop]: Abstraction has 39048 states and 60408 transitions. [2021-11-23 03:31:44,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:44,478 INFO L276 IsEmpty]: Start isEmpty. Operand 39048 states and 60408 transitions. [2021-11-23 03:31:44,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-23 03:31:44,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:44,517 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:31:44,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 03:31:44,518 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:44,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:44,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1604354251, now seen corresponding path program 1 times [2021-11-23 03:31:44,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:44,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501010635] [2021-11-23 03:31:44,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:44,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:44,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:44,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:31:44,680 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:44,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501010635] [2021-11-23 03:31:44,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501010635] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:44,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:44,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:31:44,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076196528] [2021-11-23 03:31:44,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:44,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:31:44,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:44,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:31:44,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:44,682 INFO L87 Difference]: Start difference. First operand 39048 states and 60408 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:47,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:47,613 INFO L93 Difference]: Finished difference Result 97725 states and 150341 transitions. [2021-11-23 03:31:47,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:31:47,614 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-11-23 03:31:47,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:47,734 INFO L225 Difference]: With dead ends: 97725 [2021-11-23 03:31:47,734 INFO L226 Difference]: Without dead ends: 58884 [2021-11-23 03:31:47,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:47,769 INFO L933 BasicCegarLoop]: 1847 mSDtfsCounter, 1835 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1835 SdHoareTripleChecker+Valid, 2745 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:47,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1835 Valid, 2745 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:31:47,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58884 states. [2021-11-23 03:31:50,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58884 to 58880. [2021-11-23 03:31:50,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58880 states, 58878 states have (on average 1.530707564795) internal successors, (90125), 58879 states have internal predecessors, (90125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:50,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58880 states to 58880 states and 90125 transitions. [2021-11-23 03:31:50,894 INFO L78 Accepts]: Start accepts. Automaton has 58880 states and 90125 transitions. Word has length 150 [2021-11-23 03:31:50,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:50,895 INFO L470 AbstractCegarLoop]: Abstraction has 58880 states and 90125 transitions. [2021-11-23 03:31:50,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:50,895 INFO L276 IsEmpty]: Start isEmpty. Operand 58880 states and 90125 transitions. [2021-11-23 03:31:50,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-23 03:31:50,935 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:50,935 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:31:50,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 03:31:50,936 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:50,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:50,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1551160667, now seen corresponding path program 1 times [2021-11-23 03:31:50,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:50,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297485216] [2021-11-23 03:31:50,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:50,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:51,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:31:51,601 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:51,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297485216] [2021-11-23 03:31:51,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297485216] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:51,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:51,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:31:51,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123457651] [2021-11-23 03:31:51,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:51,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:31:51,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:51,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:31:51,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:31:51,604 INFO L87 Difference]: Start difference. First operand 58880 states and 90125 transitions. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:55,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:55,406 INFO L93 Difference]: Finished difference Result 113993 states and 174877 transitions. [2021-11-23 03:31:55,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:31:55,406 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-11-23 03:31:55,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:55,554 INFO L225 Difference]: With dead ends: 113993 [2021-11-23 03:31:55,554 INFO L226 Difference]: Without dead ends: 82174 [2021-11-23 03:31:55,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:31:55,589 INFO L933 BasicCegarLoop]: 2364 mSDtfsCounter, 2849 mSDsluCounter, 2171 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2849 SdHoareTripleChecker+Valid, 4434 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:55,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2849 Valid, 4434 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:31:55,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82174 states. [2021-11-23 03:31:59,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82174 to 82166. [2021-11-23 03:31:59,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82166 states, 82164 states have (on average 1.5290638235723675) internal successors, (125634), 82165 states have internal predecessors, (125634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:59,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82166 states to 82166 states and 125634 transitions. [2021-11-23 03:31:59,872 INFO L78 Accepts]: Start accepts. Automaton has 82166 states and 125634 transitions. Word has length 151 [2021-11-23 03:31:59,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:59,873 INFO L470 AbstractCegarLoop]: Abstraction has 82166 states and 125634 transitions. [2021-11-23 03:31:59,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:31:59,873 INFO L276 IsEmpty]: Start isEmpty. Operand 82166 states and 125634 transitions. [2021-11-23 03:31:59,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 03:31:59,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:59,939 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:31:59,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 03:31:59,939 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:59,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:59,940 INFO L85 PathProgramCache]: Analyzing trace with hash 60580298, now seen corresponding path program 1 times [2021-11-23 03:31:59,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:59,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795644400] [2021-11-23 03:31:59,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:59,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:00,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:32:00,905 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:00,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795644400] [2021-11-23 03:32:00,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795644400] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:32:00,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:32:00,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:32:00,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276653636] [2021-11-23 03:32:00,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:32:00,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:32:00,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:00,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:32:00,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:32:00,907 INFO L87 Difference]: Start difference. First operand 82166 states and 125634 transitions. Second operand has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)