./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab0da11f-e99c-4bb8-b81c-24ac07006ff0/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab0da11f-e99c-4bb8-b81c-24ac07006ff0/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab0da11f-e99c-4bb8-b81c-24ac07006ff0/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab0da11f-e99c-4bb8-b81c-24ac07006ff0/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab0da11f-e99c-4bb8-b81c-24ac07006ff0/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab0da11f-e99c-4bb8-b81c-24ac07006ff0/bin/utaipan-aC7eJsxGYH --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 3fb71e8e4e407700549b8952f3afdeeffa0973a11e08bb7f18bca04e4b75e49d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:35:17,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:35:17,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:35:17,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:35:17,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:35:17,673 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:35:17,674 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:35:17,677 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:35:17,679 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:35:17,680 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:35:17,682 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:35:17,683 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:35:17,684 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:35:17,685 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:35:17,687 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:35:17,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:35:17,694 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:35:17,696 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:35:17,699 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:35:17,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:35:17,709 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:35:17,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:35:17,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:35:17,716 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:35:17,725 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:35:17,725 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:35:17,726 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:35:17,728 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:35:17,729 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:35:17,731 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:35:17,732 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:35:17,733 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:35:17,735 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:35:17,736 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:35:17,738 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:35:17,738 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:35:17,739 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:35:17,740 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:35:17,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:35:17,741 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:35:17,742 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:35:17,744 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab0da11f-e99c-4bb8-b81c-24ac07006ff0/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:35:17,788 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:35:17,791 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:35:17,792 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:35:17,792 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:35:17,793 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:35:17,793 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:35:17,793 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:35:17,793 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:35:17,794 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:35:17,794 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:35:17,795 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:35:17,795 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:35:17,796 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:35:17,796 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:35:17,796 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:35:17,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:35:17,797 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:35:17,798 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:35:17,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:35:17,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:35:17,798 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:35:17,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:35:17,799 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:35:17,799 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:35:17,799 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:35:17,799 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:35:17,799 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:35:17,800 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:35:17,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:35:17,800 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:35:17,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:35:17,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:35:17,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:35:17,801 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:35:17,802 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:35:17,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:35:17,802 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:35:17,802 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:35:17,802 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:35:17,803 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_ab0da11f-e99c-4bb8-b81c-24ac07006ff0/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab0da11f-e99c-4bb8-b81c-24ac07006ff0/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3fb71e8e4e407700549b8952f3afdeeffa0973a11e08bb7f18bca04e4b75e49d [2021-11-03 04:35:18,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:35:18,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:35:18,194 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:35:18,195 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:35:18,196 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:35:18,197 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab0da11f-e99c-4bb8-b81c-24ac07006ff0/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-03 04:35:18,276 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab0da11f-e99c-4bb8-b81c-24ac07006ff0/bin/utaipan-aC7eJsxGYH/data/db1f7c42c/d63687b9389d45deb90c09d0352c49d6/FLAGbddd14049 [2021-11-03 04:35:18,940 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:35:18,944 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab0da11f-e99c-4bb8-b81c-24ac07006ff0/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-03 04:35:18,958 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab0da11f-e99c-4bb8-b81c-24ac07006ff0/bin/utaipan-aC7eJsxGYH/data/db1f7c42c/d63687b9389d45deb90c09d0352c49d6/FLAGbddd14049 [2021-11-03 04:35:19,165 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab0da11f-e99c-4bb8-b81c-24ac07006ff0/bin/utaipan-aC7eJsxGYH/data/db1f7c42c/d63687b9389d45deb90c09d0352c49d6 [2021-11-03 04:35:19,171 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:35:19,175 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:35:19,178 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:35:19,179 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:35:19,183 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:35:19,184 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:35:19" (1/1) ... [2021-11-03 04:35:19,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@579b04d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:35:19, skipping insertion in model container [2021-11-03 04:35:19,187 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:35:19" (1/1) ... [2021-11-03 04:35:19,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:35:19,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:35:19,680 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab0da11f-e99c-4bb8-b81c-24ac07006ff0/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[10378,10391] [2021-11-03 04:35:19,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:35:19,764 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:35:19,889 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab0da11f-e99c-4bb8-b81c-24ac07006ff0/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[10378,10391] [2021-11-03 04:35:19,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:35:19,962 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:35:19,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:35:19 WrapperNode [2021-11-03 04:35:19,962 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:35:19,963 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:35:19,963 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:35:19,964 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:35:19,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:35:19" (1/1) ... [2021-11-03 04:35:20,011 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:35:19" (1/1) ... [2021-11-03 04:35:20,061 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:35:20,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:35:20,062 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:35:20,062 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:35:20,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:35:19" (1/1) ... [2021-11-03 04:35:20,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:35:19" (1/1) ... [2021-11-03 04:35:20,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:35:19" (1/1) ... [2021-11-03 04:35:20,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:35:19" (1/1) ... [2021-11-03 04:35:20,093 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:35:19" (1/1) ... [2021-11-03 04:35:20,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:35:19" (1/1) ... [2021-11-03 04:35:20,106 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:35:19" (1/1) ... [2021-11-03 04:35:20,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:35:20,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:35:20,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:35:20,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:35:20,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:35:19" (1/1) ... [2021-11-03 04:35:20,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:35:20,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab0da11f-e99c-4bb8-b81c-24ac07006ff0/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:35:20,183 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab0da11f-e99c-4bb8-b81c-24ac07006ff0/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:35:20,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab0da11f-e99c-4bb8-b81c-24ac07006ff0/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:35:20,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:35:20,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 04:35:20,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:35:20,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:35:21,983 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:35:21,983 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-03 04:35:21,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:35:21 BoogieIcfgContainer [2021-11-03 04:35:21,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:35:21,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:35:21,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:35:21,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:35:21,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:35:19" (1/3) ... [2021-11-03 04:35:21,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e41a3f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:35:21, skipping insertion in model container [2021-11-03 04:35:21,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:35:19" (2/3) ... [2021-11-03 04:35:21,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e41a3f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:35:21, skipping insertion in model container [2021-11-03 04:35:21,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:35:21" (3/3) ... [2021-11-03 04:35:21,996 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-03 04:35:22,003 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:35:22,003 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 04:35:22,060 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:35:22,073 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 [2021-11-03 04:35:22,074 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 04:35:22,100 INFO L276 IsEmpty]: Start isEmpty. Operand has 144 states, 142 states have (on average 1.7746478873239437) internal successors, (252), 143 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:22,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-03 04:35:22,110 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:35:22,110 INFO L513 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] [2021-11-03 04:35:22,111 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:35:22,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:35:22,117 INFO L85 PathProgramCache]: Analyzing trace with hash -299843787, now seen corresponding path program 1 times [2021-11-03 04:35:22,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:35:22,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763122885] [2021-11-03 04:35:22,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:22,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:35:22,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:35:22,747 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:35:22,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763122885] [2021-11-03 04:35:22,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763122885] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:35:22,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:35:22,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:35:22,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708394038] [2021-11-03 04:35:22,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:35:22,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:35:22,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:35:22,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:35:22,786 INFO L87 Difference]: Start difference. First operand has 144 states, 142 states have (on average 1.7746478873239437) internal successors, (252), 143 states have internal predecessors, (252), 0 states have call successors, (0), 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 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:23,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:35:23,109 INFO L93 Difference]: Finished difference Result 221 states and 369 transitions. [2021-11-03 04:35:23,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:35:23,111 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 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 92 [2021-11-03 04:35:23,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:35:23,129 INFO L225 Difference]: With dead ends: 221 [2021-11-03 04:35:23,129 INFO L226 Difference]: Without dead ends: 142 [2021-11-03 04:35:23,133 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:35:23,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-03 04:35:23,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-03 04:35:23,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.2127659574468086) internal successors, (171), 141 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:23,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 171 transitions. [2021-11-03 04:35:23,182 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 171 transitions. Word has length 92 [2021-11-03 04:35:23,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:35:23,183 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 171 transitions. [2021-11-03 04:35:23,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:23,184 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 171 transitions. [2021-11-03 04:35:23,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-03 04:35:23,188 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:35:23,189 INFO L513 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] [2021-11-03 04:35:23,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 04:35:23,189 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:35:23,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:35:23,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1832257677, now seen corresponding path program 1 times [2021-11-03 04:35:23,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:35:23,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838116434] [2021-11-03 04:35:23,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:23,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:35:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:23,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:35:23,411 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:35:23,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838116434] [2021-11-03 04:35:23,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838116434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:35:23,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:35:23,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:35:23,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361116616] [2021-11-03 04:35:23,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:35:23,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:35:23,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:35:23,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:35:23,420 INFO L87 Difference]: Start difference. First operand 142 states and 171 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:23,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:35:23,641 INFO L93 Difference]: Finished difference Result 221 states and 276 transitions. [2021-11-03 04:35:23,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:35:23,643 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-11-03 04:35:23,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:35:23,650 INFO L225 Difference]: With dead ends: 221 [2021-11-03 04:35:23,650 INFO L226 Difference]: Without dead ends: 142 [2021-11-03 04:35:23,652 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:35:23,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-03 04:35:23,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-03 04:35:23,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.198581560283688) internal successors, (169), 141 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:23,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 169 transitions. [2021-11-03 04:35:23,683 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 169 transitions. Word has length 93 [2021-11-03 04:35:23,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:35:23,685 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 169 transitions. [2021-11-03 04:35:23,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:23,686 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 169 transitions. [2021-11-03 04:35:23,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-03 04:35:23,696 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:35:23,697 INFO L513 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] [2021-11-03 04:35:23,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 04:35:23,698 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:35:23,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:35:23,699 INFO L85 PathProgramCache]: Analyzing trace with hash 2137785077, now seen corresponding path program 1 times [2021-11-03 04:35:23,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:35:23,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403455474] [2021-11-03 04:35:23,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:23,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:35:23,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:35:23,941 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:35:23,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403455474] [2021-11-03 04:35:23,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403455474] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:35:23,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:35:23,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:35:23,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299243352] [2021-11-03 04:35:23,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:35:23,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:35:23,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:35:23,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:35:23,945 INFO L87 Difference]: Start difference. First operand 142 states and 169 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:24,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:35:24,127 INFO L93 Difference]: Finished difference Result 217 states and 268 transitions. [2021-11-03 04:35:24,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:35:24,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-03 04:35:24,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:35:24,130 INFO L225 Difference]: With dead ends: 217 [2021-11-03 04:35:24,130 INFO L226 Difference]: Without dead ends: 142 [2021-11-03 04:35:24,131 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:35:24,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-03 04:35:24,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-03 04:35:24,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.1843971631205674) internal successors, (167), 141 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:24,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 167 transitions. [2021-11-03 04:35:24,147 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 167 transitions. Word has length 94 [2021-11-03 04:35:24,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:35:24,147 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 167 transitions. [2021-11-03 04:35:24,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:24,148 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 167 transitions. [2021-11-03 04:35:24,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-03 04:35:24,149 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:35:24,150 INFO L513 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] [2021-11-03 04:35:24,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 04:35:24,150 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:35:24,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:35:24,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1225797977, now seen corresponding path program 1 times [2021-11-03 04:35:24,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:35:24,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409338412] [2021-11-03 04:35:24,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:24,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:35:24,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:35:24,317 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:35:24,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409338412] [2021-11-03 04:35:24,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409338412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:35:24,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:35:24,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:35:24,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658046100] [2021-11-03 04:35:24,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:35:24,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:35:24,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:35:24,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:35:24,326 INFO L87 Difference]: Start difference. First operand 142 states and 167 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:24,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:35:24,476 INFO L93 Difference]: Finished difference Result 225 states and 273 transitions. [2021-11-03 04:35:24,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:35:24,476 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-03 04:35:24,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:35:24,478 INFO L225 Difference]: With dead ends: 225 [2021-11-03 04:35:24,478 INFO L226 Difference]: Without dead ends: 142 [2021-11-03 04:35:24,483 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:35:24,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-03 04:35:24,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-03 04:35:24,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.1702127659574468) internal successors, (165), 141 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:24,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 165 transitions. [2021-11-03 04:35:24,509 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 165 transitions. Word has length 95 [2021-11-03 04:35:24,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:35:24,509 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 165 transitions. [2021-11-03 04:35:24,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:24,510 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 165 transitions. [2021-11-03 04:35:24,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-03 04:35:24,511 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:35:24,511 INFO L513 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] [2021-11-03 04:35:24,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 04:35:24,511 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:35:24,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:35:24,512 INFO L85 PathProgramCache]: Analyzing trace with hash -2060914787, now seen corresponding path program 1 times [2021-11-03 04:35:24,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:35:24,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932558166] [2021-11-03 04:35:24,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:24,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:35:24,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:24,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:35:24,659 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:35:24,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932558166] [2021-11-03 04:35:24,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932558166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:35:24,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:35:24,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:35:24,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106449466] [2021-11-03 04:35:24,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:35:24,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:35:24,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:35:24,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:35:24,665 INFO L87 Difference]: Start difference. First operand 142 states and 165 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:24,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:35:24,871 INFO L93 Difference]: Finished difference Result 229 states and 274 transitions. [2021-11-03 04:35:24,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:35:24,872 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-03 04:35:24,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:35:24,874 INFO L225 Difference]: With dead ends: 229 [2021-11-03 04:35:24,875 INFO L226 Difference]: Without dead ends: 142 [2021-11-03 04:35:24,876 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:35:24,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-03 04:35:24,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-03 04:35:24,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.1631205673758864) internal successors, (164), 141 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:24,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 164 transitions. [2021-11-03 04:35:24,906 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 164 transitions. Word has length 96 [2021-11-03 04:35:24,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:35:24,907 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 164 transitions. [2021-11-03 04:35:24,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:24,908 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 164 transitions. [2021-11-03 04:35:24,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-03 04:35:24,909 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:35:24,909 INFO L513 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] [2021-11-03 04:35:24,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 04:35:24,910 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:35:24,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:35:24,910 INFO L85 PathProgramCache]: Analyzing trace with hash 49922267, now seen corresponding path program 1 times [2021-11-03 04:35:24,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:35:24,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173262055] [2021-11-03 04:35:24,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:24,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:35:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:35:25,065 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:35:25,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173262055] [2021-11-03 04:35:25,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173262055] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:35:25,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:35:25,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:35:25,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693450369] [2021-11-03 04:35:25,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:35:25,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:35:25,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:35:25,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:35:25,074 INFO L87 Difference]: Start difference. First operand 142 states and 164 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:25,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:35:25,239 INFO L93 Difference]: Finished difference Result 205 states and 247 transitions. [2021-11-03 04:35:25,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:35:25,240 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 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 97 [2021-11-03 04:35:25,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:35:25,241 INFO L225 Difference]: With dead ends: 205 [2021-11-03 04:35:25,241 INFO L226 Difference]: Without dead ends: 142 [2021-11-03 04:35:25,242 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:35:25,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-03 04:35:25,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-03 04:35:25,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.148936170212766) internal successors, (162), 141 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:25,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 162 transitions. [2021-11-03 04:35:25,259 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 162 transitions. Word has length 97 [2021-11-03 04:35:25,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:35:25,260 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 162 transitions. [2021-11-03 04:35:25,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:25,260 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 162 transitions. [2021-11-03 04:35:25,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-03 04:35:25,261 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:35:25,262 INFO L513 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] [2021-11-03 04:35:25,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 04:35:25,262 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:35:25,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:35:25,263 INFO L85 PathProgramCache]: Analyzing trace with hash -2122168691, now seen corresponding path program 1 times [2021-11-03 04:35:25,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:35:25,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396713333] [2021-11-03 04:35:25,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:25,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:35:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:25,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:35:25,391 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:35:25,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396713333] [2021-11-03 04:35:25,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396713333] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:35:25,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:35:25,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:35:25,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934822656] [2021-11-03 04:35:25,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:35:25,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:35:25,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:35:25,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:35:25,394 INFO L87 Difference]: Start difference. First operand 142 states and 162 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:25,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:35:25,543 INFO L93 Difference]: Finished difference Result 209 states and 248 transitions. [2021-11-03 04:35:25,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:35:25,544 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-11-03 04:35:25,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:35:25,546 INFO L225 Difference]: With dead ends: 209 [2021-11-03 04:35:25,546 INFO L226 Difference]: Without dead ends: 142 [2021-11-03 04:35:25,546 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:35:25,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-03 04:35:25,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-03 04:35:25,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.1347517730496455) internal successors, (160), 141 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:25,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 160 transitions. [2021-11-03 04:35:25,562 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 160 transitions. Word has length 98 [2021-11-03 04:35:25,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:35:25,562 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 160 transitions. [2021-11-03 04:35:25,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:25,563 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 160 transitions. [2021-11-03 04:35:25,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-03 04:35:25,564 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:35:25,564 INFO L513 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] [2021-11-03 04:35:25,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 04:35:25,565 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:35:25,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:35:25,565 INFO L85 PathProgramCache]: Analyzing trace with hash 290431503, now seen corresponding path program 1 times [2021-11-03 04:35:25,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:35:25,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216356518] [2021-11-03 04:35:25,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:25,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:35:25,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:40,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:35:40,075 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:35:40,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216356518] [2021-11-03 04:35:40,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216356518] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:35:40,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:35:40,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-11-03 04:35:40,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134467427] [2021-11-03 04:35:40,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-03 04:35:40,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:35:40,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-03 04:35:40,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1973, Unknown=0, NotChecked=0, Total=2162 [2021-11-03 04:35:40,079 INFO L87 Difference]: Start difference. First operand 142 states and 160 transitions. Second operand has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:01,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:36:01,869 INFO L93 Difference]: Finished difference Result 289 states and 359 transitions. [2021-11-03 04:36:01,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-03 04:36:01,870 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-11-03 04:36:01,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:36:01,873 INFO L225 Difference]: With dead ends: 289 [2021-11-03 04:36:01,873 INFO L226 Difference]: Without dead ends: 239 [2021-11-03 04:36:01,876 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=1493, Invalid=4987, Unknown=0, NotChecked=0, Total=6480 [2021-11-03 04:36:01,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-03 04:36:01,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 235. [2021-11-03 04:36:01,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.2264957264957266) internal successors, (287), 234 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:01,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 287 transitions. [2021-11-03 04:36:01,912 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 287 transitions. Word has length 99 [2021-11-03 04:36:01,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:36:01,913 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 287 transitions. [2021-11-03 04:36:01,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:01,913 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 287 transitions. [2021-11-03 04:36:01,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-03 04:36:01,914 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:36:01,915 INFO L513 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] [2021-11-03 04:36:01,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 04:36:01,915 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:36:01,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:36:01,916 INFO L85 PathProgramCache]: Analyzing trace with hash 917023825, now seen corresponding path program 1 times [2021-11-03 04:36:01,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:36:01,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610738485] [2021-11-03 04:36:01,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:36:01,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:36:02,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:36:02,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:36:02,077 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:36:02,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610738485] [2021-11-03 04:36:02,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610738485] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:36:02,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:36:02,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:36:02,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811463830] [2021-11-03 04:36:02,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:36:02,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:36:02,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:36:02,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:36:02,080 INFO L87 Difference]: Start difference. First operand 235 states and 287 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:02,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:36:02,143 INFO L93 Difference]: Finished difference Result 473 states and 611 transitions. [2021-11-03 04:36:02,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:36:02,143 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-03 04:36:02,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:36:02,146 INFO L225 Difference]: With dead ends: 473 [2021-11-03 04:36:02,146 INFO L226 Difference]: Without dead ends: 330 [2021-11-03 04:36:02,147 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:36:02,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-11-03 04:36:02,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 328. [2021-11-03 04:36:02,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.2629969418960245) internal successors, (413), 327 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:02,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 413 transitions. [2021-11-03 04:36:02,188 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 413 transitions. Word has length 101 [2021-11-03 04:36:02,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:36:02,189 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 413 transitions. [2021-11-03 04:36:02,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:02,189 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 413 transitions. [2021-11-03 04:36:02,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-03 04:36:02,190 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:36:02,190 INFO L513 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] [2021-11-03 04:36:02,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-03 04:36:02,190 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:36:02,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:36:02,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1144776020, now seen corresponding path program 1 times [2021-11-03 04:36:02,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:36:02,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347819397] [2021-11-03 04:36:02,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:36:02,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:36:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:36:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:36:17,976 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:36:17,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347819397] [2021-11-03 04:36:17,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347819397] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:36:17,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:36:17,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-11-03 04:36:17,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932313638] [2021-11-03 04:36:17,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-03 04:36:17,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:36:17,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-03 04:36:17,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=2453, Unknown=0, NotChecked=0, Total=2652 [2021-11-03 04:36:17,980 INFO L87 Difference]: Start difference. First operand 328 states and 413 transitions. Second operand has 52 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:47,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:36:47,791 INFO L93 Difference]: Finished difference Result 668 states and 874 transitions. [2021-11-03 04:36:47,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-03 04:36:47,791 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-03 04:36:47,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:36:47,794 INFO L225 Difference]: With dead ends: 668 [2021-11-03 04:36:47,795 INFO L226 Difference]: Without dead ends: 432 [2021-11-03 04:36:47,799 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=1944, Invalid=6428, Unknown=0, NotChecked=0, Total=8372 [2021-11-03 04:36:47,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-11-03 04:36:47,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 425. [2021-11-03 04:36:47,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 1.2806603773584906) internal successors, (543), 424 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:47,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 543 transitions. [2021-11-03 04:36:47,844 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 543 transitions. Word has length 101 [2021-11-03 04:36:47,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:36:47,845 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 543 transitions. [2021-11-03 04:36:47,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:47,845 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 543 transitions. [2021-11-03 04:36:47,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-03 04:36:47,847 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:36:47,847 INFO L513 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] [2021-11-03 04:36:47,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-03 04:36:47,847 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:36:47,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:36:47,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1142734549, now seen corresponding path program 1 times [2021-11-03 04:36:47,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:36:47,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546870972] [2021-11-03 04:36:47,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:36:47,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:36:47,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:36:47,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:36:47,934 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:36:47,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546870972] [2021-11-03 04:36:47,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546870972] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:36:47,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:36:47,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-03 04:36:47,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540058221] [2021-11-03 04:36:47,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:36:47,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:36:47,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:36:47,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:36:47,936 INFO L87 Difference]: Start difference. First operand 425 states and 543 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:48,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:36:48,132 INFO L93 Difference]: Finished difference Result 795 states and 1037 transitions. [2021-11-03 04:36:48,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:36:48,132 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 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 102 [2021-11-03 04:36:48,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:36:48,136 INFO L225 Difference]: With dead ends: 795 [2021-11-03 04:36:48,136 INFO L226 Difference]: Without dead ends: 652 [2021-11-03 04:36:48,137 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-03 04:36:48,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-11-03 04:36:48,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 376. [2021-11-03 04:36:48,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 1.264) internal successors, (474), 375 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:48,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 474 transitions. [2021-11-03 04:36:48,196 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 474 transitions. Word has length 102 [2021-11-03 04:36:48,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:36:48,196 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 474 transitions. [2021-11-03 04:36:48,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:48,197 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 474 transitions. [2021-11-03 04:36:48,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-03 04:36:48,198 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:36:48,198 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:36:48,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-03 04:36:48,199 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:36:48,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:36:48,199 INFO L85 PathProgramCache]: Analyzing trace with hash 627043477, now seen corresponding path program 1 times [2021-11-03 04:36:48,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:36:48,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786961907] [2021-11-03 04:36:48,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:36:48,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:36:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:36:48,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:36:48,271 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:36:48,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786961907] [2021-11-03 04:36:48,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786961907] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:36:48,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:36:48,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:36:48,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075003450] [2021-11-03 04:36:48,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:36:48,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:36:48,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:36:48,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:36:48,273 INFO L87 Difference]: Start difference. First operand 376 states and 474 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:48,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:36:48,354 INFO L93 Difference]: Finished difference Result 702 states and 915 transitions. [2021-11-03 04:36:48,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:36:48,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 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 119 [2021-11-03 04:36:48,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:36:48,358 INFO L225 Difference]: With dead ends: 702 [2021-11-03 04:36:48,358 INFO L226 Difference]: Without dead ends: 468 [2021-11-03 04:36:48,359 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:36:48,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-11-03 04:36:48,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 446. [2021-11-03 04:36:48,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.2651685393258427) internal successors, (563), 445 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:48,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 563 transitions. [2021-11-03 04:36:48,425 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 563 transitions. Word has length 119 [2021-11-03 04:36:48,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:36:48,426 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 563 transitions. [2021-11-03 04:36:48,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:48,426 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 563 transitions. [2021-11-03 04:36:48,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-03 04:36:48,428 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:36:48,428 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:36:48,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-03 04:36:48,429 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:36:48,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:36:48,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1282013094, now seen corresponding path program 1 times [2021-11-03 04:36:48,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:36:48,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538132421] [2021-11-03 04:36:48,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:36:48,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:36:48,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:36:48,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:36:48,505 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:36:48,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538132421] [2021-11-03 04:36:48,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538132421] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:36:48,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:36:48,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:36:48,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543973723] [2021-11-03 04:36:48,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:36:48,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:36:48,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:36:48,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:36:48,509 INFO L87 Difference]: Start difference. First operand 446 states and 563 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:48,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:36:48,630 INFO L93 Difference]: Finished difference Result 934 states and 1225 transitions. [2021-11-03 04:36:48,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:36:48,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-11-03 04:36:48,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:36:48,635 INFO L225 Difference]: With dead ends: 934 [2021-11-03 04:36:48,635 INFO L226 Difference]: Without dead ends: 646 [2021-11-03 04:36:48,636 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:36:48,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-11-03 04:36:48,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 616. [2021-11-03 04:36:48,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 1.2910569105691057) internal successors, (794), 615 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:48,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 794 transitions. [2021-11-03 04:36:48,726 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 794 transitions. Word has length 122 [2021-11-03 04:36:48,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:36:48,727 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 794 transitions. [2021-11-03 04:36:48,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:48,727 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 794 transitions. [2021-11-03 04:36:48,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-03 04:36:48,729 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:36:48,729 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:36:48,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-03 04:36:48,730 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:36:48,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:36:48,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1993001682, now seen corresponding path program 1 times [2021-11-03 04:36:48,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:36:48,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246647993] [2021-11-03 04:36:48,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:36:48,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:36:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:36:48,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:36:48,801 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:36:48,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246647993] [2021-11-03 04:36:48,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246647993] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:36:48,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:36:48,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:36:48,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534674412] [2021-11-03 04:36:48,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:36:48,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:36:48,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:36:48,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:36:48,803 INFO L87 Difference]: Start difference. First operand 616 states and 794 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:48,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:36:48,966 INFO L93 Difference]: Finished difference Result 1450 states and 1925 transitions. [2021-11-03 04:36:48,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:36:48,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 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 125 [2021-11-03 04:36:48,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:36:48,972 INFO L225 Difference]: With dead ends: 1450 [2021-11-03 04:36:48,972 INFO L226 Difference]: Without dead ends: 998 [2021-11-03 04:36:48,974 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:36:48,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-11-03 04:36:49,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 956. [2021-11-03 04:36:49,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 1.3120418848167539) internal successors, (1253), 955 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:49,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1253 transitions. [2021-11-03 04:36:49,120 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1253 transitions. Word has length 125 [2021-11-03 04:36:49,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:36:49,121 INFO L470 AbstractCegarLoop]: Abstraction has 956 states and 1253 transitions. [2021-11-03 04:36:49,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:49,121 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1253 transitions. [2021-11-03 04:36:49,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-03 04:36:49,124 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:36:49,124 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:36:49,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-03 04:36:49,124 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:36:49,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:36:49,125 INFO L85 PathProgramCache]: Analyzing trace with hash -378984628, now seen corresponding path program 1 times [2021-11-03 04:36:49,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:36:49,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073271496] [2021-11-03 04:36:49,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:36:49,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:36:49,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:36:49,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:36:49,199 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:36:49,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073271496] [2021-11-03 04:36:49,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073271496] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:36:49,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:36:49,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:36:49,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546371600] [2021-11-03 04:36:49,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:36:49,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:36:49,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:36:49,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:36:49,201 INFO L87 Difference]: Start difference. First operand 956 states and 1253 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:49,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:36:49,462 INFO L93 Difference]: Finished difference Result 2476 states and 3312 transitions. [2021-11-03 04:36:49,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:36:49,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 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 128 [2021-11-03 04:36:49,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:36:49,472 INFO L225 Difference]: With dead ends: 2476 [2021-11-03 04:36:49,472 INFO L226 Difference]: Without dead ends: 1690 [2021-11-03 04:36:49,476 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:36:49,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2021-11-03 04:36:49,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1624. [2021-11-03 04:36:49,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1623 states have (on average 1.325939617991374) internal successors, (2152), 1623 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:49,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2152 transitions. [2021-11-03 04:36:49,737 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2152 transitions. Word has length 128 [2021-11-03 04:36:49,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:36:49,737 INFO L470 AbstractCegarLoop]: Abstraction has 1624 states and 2152 transitions. [2021-11-03 04:36:49,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:49,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2152 transitions. [2021-11-03 04:36:49,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-03 04:36:49,739 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:36:49,739 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:36:49,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-03 04:36:49,740 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:36:49,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:36:49,740 INFO L85 PathProgramCache]: Analyzing trace with hash 830726985, now seen corresponding path program 1 times [2021-11-03 04:36:49,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:36:49,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595823848] [2021-11-03 04:36:49,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:36:49,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:36:49,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:36:49,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:36:49,820 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:36:49,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595823848] [2021-11-03 04:36:49,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595823848] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:36:49,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:36:49,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:36:49,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427635291] [2021-11-03 04:36:49,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:36:49,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:36:49,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:36:49,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:36:49,824 INFO L87 Difference]: Start difference. First operand 1624 states and 2152 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:50,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:36:50,299 INFO L93 Difference]: Finished difference Result 4486 states and 6019 transitions. [2021-11-03 04:36:50,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:36:50,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2021-11-03 04:36:50,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:36:50,317 INFO L225 Difference]: With dead ends: 4486 [2021-11-03 04:36:50,317 INFO L226 Difference]: Without dead ends: 3038 [2021-11-03 04:36:50,322 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:36:50,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3038 states. [2021-11-03 04:36:50,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3038 to 2924. [2021-11-03 04:36:50,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2924 states, 2923 states have (on average 1.332535066712282) internal successors, (3895), 2923 states have internal predecessors, (3895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:50,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2924 states to 2924 states and 3895 transitions. [2021-11-03 04:36:50,868 INFO L78 Accepts]: Start accepts. Automaton has 2924 states and 3895 transitions. Word has length 131 [2021-11-03 04:36:50,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:36:50,869 INFO L470 AbstractCegarLoop]: Abstraction has 2924 states and 3895 transitions. [2021-11-03 04:36:50,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:50,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2924 states and 3895 transitions. [2021-11-03 04:36:50,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-03 04:36:50,871 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:36:50,871 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:36:50,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-03 04:36:50,871 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:36:50,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:36:50,872 INFO L85 PathProgramCache]: Analyzing trace with hash -667416480, now seen corresponding path program 1 times [2021-11-03 04:36:50,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:36:50,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916313093] [2021-11-03 04:36:50,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:36:50,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:36:50,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:36:50,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:36:50,944 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:36:50,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916313093] [2021-11-03 04:36:50,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916313093] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:36:50,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:36:50,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:36:50,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867670252] [2021-11-03 04:36:50,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:36:50,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:36:50,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:36:50,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:36:50,946 INFO L87 Difference]: Start difference. First operand 2924 states and 3895 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:51,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:36:51,832 INFO L93 Difference]: Finished difference Result 8392 states and 11258 transitions. [2021-11-03 04:36:51,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:36:51,833 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-11-03 04:36:51,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:36:51,863 INFO L225 Difference]: With dead ends: 8392 [2021-11-03 04:36:51,863 INFO L226 Difference]: Without dead ends: 5650 [2021-11-03 04:36:51,869 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:36:51,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5650 states. [2021-11-03 04:36:52,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5650 to 5440. [2021-11-03 04:36:52,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5440 states, 5439 states have (on average 1.3337010479867624) internal successors, (7254), 5439 states have internal predecessors, (7254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:52,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5440 states to 5440 states and 7254 transitions. [2021-11-03 04:36:52,787 INFO L78 Accepts]: Start accepts. Automaton has 5440 states and 7254 transitions. Word has length 134 [2021-11-03 04:36:52,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:36:52,788 INFO L470 AbstractCegarLoop]: Abstraction has 5440 states and 7254 transitions. [2021-11-03 04:36:52,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:52,788 INFO L276 IsEmpty]: Start isEmpty. Operand 5440 states and 7254 transitions. [2021-11-03 04:36:52,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-03 04:36:52,790 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:36:52,790 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:36:52,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-03 04:36:52,790 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:36:52,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:36:52,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1405598606, now seen corresponding path program 1 times [2021-11-03 04:36:52,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:36:52,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468201105] [2021-11-03 04:36:52,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:36:52,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:36:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:36:52,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:36:52,905 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:36:52,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468201105] [2021-11-03 04:36:52,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468201105] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:36:52,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:36:52,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:36:52,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152502005] [2021-11-03 04:36:52,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:36:52,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:36:52,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:36:52,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:36:52,907 INFO L87 Difference]: Start difference. First operand 5440 states and 7254 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:54,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:36:54,180 INFO L93 Difference]: Finished difference Result 15938 states and 21334 transitions. [2021-11-03 04:36:54,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:36:54,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 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 137 [2021-11-03 04:36:54,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:36:54,234 INFO L225 Difference]: With dead ends: 15938 [2021-11-03 04:36:54,234 INFO L226 Difference]: Without dead ends: 10686 [2021-11-03 04:36:54,245 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:36:54,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10686 states. [2021-11-03 04:36:55,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10686 to 10288. [2021-11-03 04:36:55,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10288 states, 10287 states have (on average 1.3313891319140663) internal successors, (13696), 10287 states have internal predecessors, (13696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:55,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10288 states to 10288 states and 13696 transitions. [2021-11-03 04:36:55,839 INFO L78 Accepts]: Start accepts. Automaton has 10288 states and 13696 transitions. Word has length 137 [2021-11-03 04:36:55,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:36:55,839 INFO L470 AbstractCegarLoop]: Abstraction has 10288 states and 13696 transitions. [2021-11-03 04:36:55,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:55,840 INFO L276 IsEmpty]: Start isEmpty. Operand 10288 states and 13696 transitions. [2021-11-03 04:36:55,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-03 04:36:55,841 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:36:55,842 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:36:55,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-03 04:36:55,842 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:36:55,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:36:55,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1206463893, now seen corresponding path program 1 times [2021-11-03 04:36:55,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:36:55,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262716772] [2021-11-03 04:36:55,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:36:55,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:36:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:36:55,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-03 04:36:55,909 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:36:55,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262716772] [2021-11-03 04:36:55,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262716772] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:36:55,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:36:55,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:36:55,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822199388] [2021-11-03 04:36:55,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:36:55,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:36:55,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:36:55,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:36:55,912 INFO L87 Difference]: Start difference. First operand 10288 states and 13696 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 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) [2021-11-03 04:36:57,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:36:57,252 INFO L93 Difference]: Finished difference Result 20388 states and 27180 transitions. [2021-11-03 04:36:57,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:36:57,253 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 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 142 [2021-11-03 04:36:57,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:36:57,286 INFO L225 Difference]: With dead ends: 20388 [2021-11-03 04:36:57,286 INFO L226 Difference]: Without dead ends: 10198 [2021-11-03 04:36:57,301 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:36:57,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10198 states. [2021-11-03 04:36:58,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10198 to 8710. [2021-11-03 04:36:58,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8710 states, 8709 states have (on average 1.3119761166609254) internal successors, (11426), 8709 states have internal predecessors, (11426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:58,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8710 states to 8710 states and 11426 transitions. [2021-11-03 04:36:58,597 INFO L78 Accepts]: Start accepts. Automaton has 8710 states and 11426 transitions. Word has length 142 [2021-11-03 04:36:58,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:36:58,597 INFO L470 AbstractCegarLoop]: Abstraction has 8710 states and 11426 transitions. [2021-11-03 04:36:58,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 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) [2021-11-03 04:36:58,598 INFO L276 IsEmpty]: Start isEmpty. Operand 8710 states and 11426 transitions. [2021-11-03 04:36:58,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-03 04:36:58,600 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:36:58,600 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:36:58,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-03 04:36:58,601 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:36:58,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:36:58,601 INFO L85 PathProgramCache]: Analyzing trace with hash 293070734, now seen corresponding path program 1 times [2021-11-03 04:36:58,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:36:58,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393701722] [2021-11-03 04:36:58,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:36:58,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:36:59,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:38:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:38:16,740 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:38:16,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393701722] [2021-11-03 04:38:16,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393701722] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:38:16,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332317545] [2021-11-03 04:38:16,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:38:16,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:38:16,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab0da11f-e99c-4bb8-b81c-24ac07006ff0/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:38:16,742 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab0da11f-e99c-4bb8-b81c-24ac07006ff0/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:38:16,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab0da11f-e99c-4bb8-b81c-24ac07006ff0/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 04:38:17,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:38:17,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 196 conjunts are in the unsatisfiable core [2021-11-03 04:38:17,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:42:45,993 WARN L207 SmtUtils]: Spent 6.57 s on a formula simplification that was a NOOP. DAG size: 232 [2021-11-03 04:47:15,060 WARN L207 SmtUtils]: Spent 2.24 m on a formula simplification. DAG size of input: 315 DAG size of output: 298 [2021-11-03 04:49:44,661 WARN L207 SmtUtils]: Spent 1.57 m on a formula simplification that was a NOOP. DAG size: 303