./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cebf87e6-0760-4a41-af80-6de15f53c5ec/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cebf87e6-0760-4a41-af80-6de15f53c5ec/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cebf87e6-0760-4a41-af80-6de15f53c5ec/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cebf87e6-0760-4a41-af80-6de15f53c5ec/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cebf87e6-0760-4a41-af80-6de15f53c5ec/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cebf87e6-0760-4a41-af80-6de15f53c5ec/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4008c7bad6e9f0faf3cf745d811b7950453991ed3720a7122a910bf51077877c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:19:51,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:19:51,733 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:19:51,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:19:51,803 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:19:51,808 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:19:51,810 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:19:51,814 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:19:51,817 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:19:51,823 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:19:51,824 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:19:51,826 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:19:51,827 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:19:51,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:19:51,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:19:51,836 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:19:51,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:19:51,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:19:51,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:19:51,851 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:19:51,853 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:19:51,855 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:19:51,858 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:19:51,860 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:19:51,864 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:19:51,865 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:19:51,865 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:19:51,867 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:19:51,868 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:19:51,870 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:19:51,870 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:19:51,872 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:19:51,874 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:19:51,875 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:19:51,877 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:19:51,878 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:19:51,879 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:19:51,879 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:19:51,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:19:51,881 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:19:51,882 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:19:51,883 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cebf87e6-0760-4a41-af80-6de15f53c5ec/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:19:51,929 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:19:51,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:19:51,931 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:19:51,931 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:19:51,932 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:19:51,940 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:19:51,940 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:19:51,941 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:19:51,941 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:19:51,941 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:19:51,943 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:19:51,943 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:19:51,943 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:19:51,944 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:19:51,944 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:19:51,944 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:19:51,945 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:19:51,945 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:19:51,946 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:19:51,947 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:19:51,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:19:51,948 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:19:51,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:19:51,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:19:51,949 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:19:51,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:19:51,951 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:19:51,951 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:19:51,952 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:19:51,952 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:19:51,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:19:51,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:19:51,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:19:51,953 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:19:51,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:19:51,954 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:19:51,954 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:19:51,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:19:51,955 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:19:51,955 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:19:51,955 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:19:51,955 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_cebf87e6-0760-4a41-af80-6de15f53c5ec/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cebf87e6-0760-4a41-af80-6de15f53c5ec/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4008c7bad6e9f0faf3cf745d811b7950453991ed3720a7122a910bf51077877c [2021-11-23 03:19:52,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:19:52,265 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:19:52,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:19:52,269 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:19:52,269 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:19:52,271 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cebf87e6-0760-4a41-af80-6de15f53c5ec/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c [2021-11-23 03:19:52,349 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cebf87e6-0760-4a41-af80-6de15f53c5ec/bin/utaipan-EQgc7hIp5V/data/ef913400e/dfda13a0405345d7af0b2304f9d4a84e/FLAG12a3d5ca8 [2021-11-23 03:19:52,890 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:19:52,890 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cebf87e6-0760-4a41-af80-6de15f53c5ec/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c [2021-11-23 03:19:52,904 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cebf87e6-0760-4a41-af80-6de15f53c5ec/bin/utaipan-EQgc7hIp5V/data/ef913400e/dfda13a0405345d7af0b2304f9d4a84e/FLAG12a3d5ca8 [2021-11-23 03:19:53,227 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cebf87e6-0760-4a41-af80-6de15f53c5ec/bin/utaipan-EQgc7hIp5V/data/ef913400e/dfda13a0405345d7af0b2304f9d4a84e [2021-11-23 03:19:53,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:19:53,233 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:19:53,238 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:19:53,239 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:19:53,243 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:19:53,244 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:19:53" (1/1) ... [2021-11-23 03:19:53,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30f5ad03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:19:53, skipping insertion in model container [2021-11-23 03:19:53,247 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:19:53" (1/1) ... [2021-11-23 03:19:53,254 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:19:53,333 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:19:53,662 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cebf87e6-0760-4a41-af80-6de15f53c5ec/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c[10525,10538] [2021-11-23 03:19:53,737 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:19:53,763 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:19:53,894 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cebf87e6-0760-4a41-af80-6de15f53c5ec/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c[10525,10538] [2021-11-23 03:19:53,934 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:19:53,954 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:19:53,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:19:53 WrapperNode [2021-11-23 03:19:53,955 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:19:53,956 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:19:53,956 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:19:53,957 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:19:53,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:19:53" (1/1) ... [2021-11-23 03:19:53,981 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:19:53" (1/1) ... [2021-11-23 03:19:54,035 INFO L137 Inliner]: procedures = 26, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 841 [2021-11-23 03:19:54,035 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:19:54,036 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:19:54,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:19:54,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:19:54,045 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:19:53" (1/1) ... [2021-11-23 03:19:54,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:19:53" (1/1) ... [2021-11-23 03:19:54,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:19:53" (1/1) ... [2021-11-23 03:19:54,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:19:53" (1/1) ... [2021-11-23 03:19:54,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:19:53" (1/1) ... [2021-11-23 03:19:54,099 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:19:53" (1/1) ... [2021-11-23 03:19:54,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:19:53" (1/1) ... [2021-11-23 03:19:54,109 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:19:54,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:19:54,110 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:19:54,110 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:19:54,111 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:19:53" (1/1) ... [2021-11-23 03:19:54,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:19:54,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cebf87e6-0760-4a41-af80-6de15f53c5ec/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:19:54,145 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cebf87e6-0760-4a41-af80-6de15f53c5ec/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:19:54,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cebf87e6-0760-4a41-af80-6de15f53c5ec/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:19:54,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:19:54,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:19:54,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:19:54,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:19:54,386 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:19:54,388 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:19:55,143 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:19:55,380 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:19:55,381 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 03:19:55,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:19:55 BoogieIcfgContainer [2021-11-23 03:19:55,384 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:19:55,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:19:55,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:19:55,390 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:19:55,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:19:53" (1/3) ... [2021-11-23 03:19:55,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a648f6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:19:55, skipping insertion in model container [2021-11-23 03:19:55,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:19:53" (2/3) ... [2021-11-23 03:19:55,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a648f6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:19:55, skipping insertion in model container [2021-11-23 03:19:55,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:19:55" (3/3) ... [2021-11-23 03:19:55,394 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c [2021-11-23 03:19:55,401 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:19:55,401 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:19:55,451 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:19:55,456 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:19:55,456 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:19:55,476 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 145 states have (on average 1.7724137931034483) internal successors, (257), 146 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:19:55,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-23 03:19:55,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:19:55,487 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:19:55,488 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:19:55,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:19:55,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1020781982, now seen corresponding path program 1 times [2021-11-23 03:19:55,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:19:55,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948762119] [2021-11-23 03:19:55,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:19:55,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:19:55,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:19:56,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:19:56,132 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:19:56,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948762119] [2021-11-23 03:19:56,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948762119] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:19:56,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:19:56,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:19:56,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7194040] [2021-11-23 03:19:56,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:19:56,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:19:56,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:19:56,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:19:56,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:19:56,180 INFO L87 Difference]: Start difference. First operand has 147 states, 145 states have (on average 1.7724137931034483) internal successors, (257), 146 states have internal predecessors, (257), 0 states have call successors, (0), 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 18.6) 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) [2021-11-23 03:19:56,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:19:56,553 INFO L93 Difference]: Finished difference Result 242 states and 405 transitions. [2021-11-23 03:19:56,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:19:56,556 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 [2021-11-23 03:19:56,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:19:56,576 INFO L225 Difference]: With dead ends: 242 [2021-11-23 03:19:56,576 INFO L226 Difference]: Without dead ends: 145 [2021-11-23 03:19:56,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:19:56,588 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 690 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:19:56,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 160 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:19:56,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-23 03:19:56,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-23 03:19:56,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.2083333333333333) internal successors, (174), 144 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:19:56,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 174 transitions. [2021-11-23 03:19:56,688 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 174 transitions. Word has length 93 [2021-11-23 03:19:56,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:19:56,689 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 174 transitions. [2021-11-23 03:19:56,689 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) [2021-11-23 03:19:56,690 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 174 transitions. [2021-11-23 03:19:56,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-23 03:19:56,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:19:56,695 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:19:56,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:19:56,696 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:19:56,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:19:56,697 INFO L85 PathProgramCache]: Analyzing trace with hash 63022168, now seen corresponding path program 1 times [2021-11-23 03:19:56,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:19:56,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558314624] [2021-11-23 03:19:56,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:19:56,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:19:56,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:19:56,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:19:56,924 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:19:56,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558314624] [2021-11-23 03:19:56,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558314624] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:19:56,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:19:56,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:19:56,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160190043] [2021-11-23 03:19:56,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:19:56,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:19:56,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:19:56,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:19:56,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:19:56,929 INFO L87 Difference]: Start difference. First operand 145 states and 174 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) [2021-11-23 03:19:57,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:19:57,117 INFO L93 Difference]: Finished difference Result 218 states and 272 transitions. [2021-11-23 03:19:57,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:19:57,118 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 [2021-11-23 03:19:57,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:19:57,124 INFO L225 Difference]: With dead ends: 218 [2021-11-23 03:19:57,124 INFO L226 Difference]: Without dead ends: 145 [2021-11-23 03:19:57,131 INFO L932 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 [2021-11-23 03:19:57,133 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 405 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:19:57,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 123 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:19:57,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-23 03:19:57,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-23 03:19:57,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.1944444444444444) internal successors, (172), 144 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:19:57,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 172 transitions. [2021-11-23 03:19:57,163 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 172 transitions. Word has length 94 [2021-11-23 03:19:57,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:19:57,170 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 172 transitions. [2021-11-23 03:19:57,171 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) [2021-11-23 03:19:57,171 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 172 transitions. [2021-11-23 03:19:57,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 03:19:57,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:19:57,177 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:19:57,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:19:57,178 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:19:57,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:19:57,180 INFO L85 PathProgramCache]: Analyzing trace with hash -548286174, now seen corresponding path program 1 times [2021-11-23 03:19:57,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:19:57,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675495884] [2021-11-23 03:19:57,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:19:57,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:19:57,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:19:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:19:57,465 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:19:57,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675495884] [2021-11-23 03:19:57,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675495884] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:19:57,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:19:57,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:19:57,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633453818] [2021-11-23 03:19:57,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:19:57,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:19:57,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:19:57,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:19:57,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:19:57,472 INFO L87 Difference]: Start difference. First operand 145 states and 172 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) [2021-11-23 03:19:57,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:19:57,666 INFO L93 Difference]: Finished difference Result 226 states and 278 transitions. [2021-11-23 03:19:57,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:19:57,667 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 [2021-11-23 03:19:57,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:19:57,670 INFO L225 Difference]: With dead ends: 226 [2021-11-23 03:19:57,670 INFO L226 Difference]: Without dead ends: 145 [2021-11-23 03:19:57,671 INFO L932 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 [2021-11-23 03:19:57,679 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 421 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:19:57,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 107 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:19:57,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-23 03:19:57,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-23 03:19:57,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.1805555555555556) internal successors, (170), 144 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:19:57,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 170 transitions. [2021-11-23 03:19:57,713 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 170 transitions. Word has length 95 [2021-11-23 03:19:57,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:19:57,714 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 170 transitions. [2021-11-23 03:19:57,714 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) [2021-11-23 03:19:57,714 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 170 transitions. [2021-11-23 03:19:57,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-23 03:19:57,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:19:57,716 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:19:57,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:19:57,717 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:19:57,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:19:57,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1530571160, now seen corresponding path program 1 times [2021-11-23 03:19:57,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:19:57,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304016438] [2021-11-23 03:19:57,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:19:57,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:19:57,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:19:57,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:19:57,901 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:19:57,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304016438] [2021-11-23 03:19:57,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304016438] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:19:57,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:19:57,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:19:57,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335161509] [2021-11-23 03:19:57,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:19:57,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:19:57,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:19:57,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:19:57,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:19:57,905 INFO L87 Difference]: Start difference. First operand 145 states and 170 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) [2021-11-23 03:19:58,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:19:58,048 INFO L93 Difference]: Finished difference Result 222 states and 270 transitions. [2021-11-23 03:19:58,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:19:58,049 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 [2021-11-23 03:19:58,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:19:58,051 INFO L225 Difference]: With dead ends: 222 [2021-11-23 03:19:58,051 INFO L226 Difference]: Without dead ends: 145 [2021-11-23 03:19:58,054 INFO L932 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 [2021-11-23 03:19:58,061 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 403 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:19:58,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 115 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:19:58,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-23 03:19:58,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-23 03:19:58,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.1666666666666667) internal successors, (168), 144 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:19:58,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 168 transitions. [2021-11-23 03:19:58,086 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 168 transitions. Word has length 96 [2021-11-23 03:19:58,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:19:58,088 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 168 transitions. [2021-11-23 03:19:58,088 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) [2021-11-23 03:19:58,088 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 168 transitions. [2021-11-23 03:19:58,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 03:19:58,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:19:58,099 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:19:58,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:19:58,099 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:19:58,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:19:58,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1704898730, now seen corresponding path program 1 times [2021-11-23 03:19:58,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:19:58,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396219930] [2021-11-23 03:19:58,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:19:58,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:19:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:19:58,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:19:58,255 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:19:58,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396219930] [2021-11-23 03:19:58,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396219930] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:19:58,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:19:58,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:19:58,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220176954] [2021-11-23 03:19:58,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:19:58,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:19:58,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:19:58,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:19:58,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:19:58,260 INFO L87 Difference]: Start difference. First operand 145 states and 168 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) [2021-11-23 03:19:58,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:19:58,412 INFO L93 Difference]: Finished difference Result 230 states and 275 transitions. [2021-11-23 03:19:58,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:19:58,412 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 [2021-11-23 03:19:58,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:19:58,415 INFO L225 Difference]: With dead ends: 230 [2021-11-23 03:19:58,415 INFO L226 Difference]: Without dead ends: 145 [2021-11-23 03:19:58,416 INFO L932 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 [2021-11-23 03:19:58,417 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 420 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:19:58,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 99 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:19:58,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-23 03:19:58,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-23 03:19:58,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.1527777777777777) internal successors, (166), 144 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:19:58,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 166 transitions. [2021-11-23 03:19:58,447 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 166 transitions. Word has length 97 [2021-11-23 03:19:58,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:19:58,449 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 166 transitions. [2021-11-23 03:19:58,449 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) [2021-11-23 03:19:58,449 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 166 transitions. [2021-11-23 03:19:58,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-23 03:19:58,457 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:19:58,457 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:19:58,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:19:58,458 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:19:58,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:19:58,459 INFO L85 PathProgramCache]: Analyzing trace with hash 608209088, now seen corresponding path program 1 times [2021-11-23 03:19:58,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:19:58,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596955867] [2021-11-23 03:19:58,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:19:58,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:19:58,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:19:58,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:19:58,577 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:19:58,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596955867] [2021-11-23 03:19:58,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596955867] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:19:58,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:19:58,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:19:58,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991485413] [2021-11-23 03:19:58,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:19:58,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:19:58,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:19:58,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:19:58,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:19:58,580 INFO L87 Difference]: Start difference. First operand 145 states and 166 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) [2021-11-23 03:19:58,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:19:58,715 INFO L93 Difference]: Finished difference Result 210 states and 250 transitions. [2021-11-23 03:19:58,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:19:58,716 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 [2021-11-23 03:19:58,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:19:58,717 INFO L225 Difference]: With dead ends: 210 [2021-11-23 03:19:58,717 INFO L226 Difference]: Without dead ends: 145 [2021-11-23 03:19:58,718 INFO L932 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 [2021-11-23 03:19:58,719 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 358 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:19:58,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 139 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:19:58,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-23 03:19:58,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-23 03:19:58,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.1388888888888888) internal successors, (164), 144 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) [2021-11-23 03:19:58,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 164 transitions. [2021-11-23 03:19:58,738 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 164 transitions. Word has length 98 [2021-11-23 03:19:58,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:19:58,738 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 164 transitions. [2021-11-23 03:19:58,740 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) [2021-11-23 03:19:58,740 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 164 transitions. [2021-11-23 03:19:58,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 03:19:58,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:19:58,741 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:19:58,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:19:58,742 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:19:58,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:19:58,742 INFO L85 PathProgramCache]: Analyzing trace with hash -893794886, now seen corresponding path program 1 times [2021-11-23 03:19:58,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:19:58,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492182473] [2021-11-23 03:19:58,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:19:58,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:19:58,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:19:58,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:19:58,856 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:19:58,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492182473] [2021-11-23 03:19:58,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492182473] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:19:58,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:19:58,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:19:58,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94977355] [2021-11-23 03:19:58,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:19:58,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:19:58,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:19:58,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:19:58,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:19:58,858 INFO L87 Difference]: Start difference. First operand 145 states and 164 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 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) [2021-11-23 03:19:58,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:19:58,991 INFO L93 Difference]: Finished difference Result 214 states and 251 transitions. [2021-11-23 03:19:58,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:19:58,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 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 [2021-11-23 03:19:58,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:19:58,993 INFO L225 Difference]: With dead ends: 214 [2021-11-23 03:19:58,993 INFO L226 Difference]: Without dead ends: 145 [2021-11-23 03:19:58,994 INFO L932 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 [2021-11-23 03:19:58,995 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 360 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:19:58,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 131 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:19:58,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-23 03:19:59,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-23 03:19:59,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.125) internal successors, (162), 144 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:19:59,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 162 transitions. [2021-11-23 03:19:59,011 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 162 transitions. Word has length 99 [2021-11-23 03:19:59,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:19:59,011 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 162 transitions. [2021-11-23 03:19:59,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 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) [2021-11-23 03:19:59,012 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 162 transitions. [2021-11-23 03:19:59,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-23 03:19:59,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:19:59,013 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:19:59,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:19:59,014 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:19:59,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:19:59,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1409225868, now seen corresponding path program 1 times [2021-11-23 03:19:59,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:19:59,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330473051] [2021-11-23 03:19:59,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:19:59,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:19:59,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:20:16,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:20:16,345 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:20:16,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330473051] [2021-11-23 03:20:16,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330473051] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:20:16,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:20:16,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-11-23 03:20:16,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673901788] [2021-11-23 03:20:16,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:20:16,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-23 03:20:16,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:20:16,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-23 03:20:16,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=2340, Unknown=0, NotChecked=0, Total=2550 [2021-11-23 03:20:16,351 INFO L87 Difference]: Start difference. First operand 145 states and 162 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:20:41,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:20:41,204 INFO L93 Difference]: Finished difference Result 253 states and 304 transitions. [2021-11-23 03:20:41,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-23 03:20:41,205 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2021-11-23 03:20:41,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:20:41,207 INFO L225 Difference]: With dead ends: 253 [2021-11-23 03:20:41,207 INFO L226 Difference]: Without dead ends: 201 [2021-11-23 03:20:41,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=1814, Invalid=5842, Unknown=0, NotChecked=0, Total=7656 [2021-11-23 03:20:41,212 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 1495 mSDsluCounter, 1425 mSDsCounter, 0 mSdLazyCounter, 3279 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1495 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 3343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 3279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:20:41,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1495 Valid, 1540 Invalid, 3343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 3279 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-11-23 03:20:41,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-23 03:20:41,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 194. [2021-11-23 03:20:41,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.1761658031088082) internal successors, (227), 193 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:20:41,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 227 transitions. [2021-11-23 03:20:41,244 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 227 transitions. Word has length 100 [2021-11-23 03:20:41,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:20:41,245 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 227 transitions. [2021-11-23 03:20:41,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:20:41,246 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 227 transitions. [2021-11-23 03:20:41,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 03:20:41,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:20:41,247 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:20:41,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 03:20:41,248 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:20:41,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:20:41,249 INFO L85 PathProgramCache]: Analyzing trace with hash -110709160, now seen corresponding path program 1 times [2021-11-23 03:20:41,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:20:41,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569927566] [2021-11-23 03:20:41,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:20:41,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:20:41,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:21:02,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:21:02,388 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:21:02,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569927566] [2021-11-23 03:21:02,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569927566] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:21:02,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:21:02,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-11-23 03:21:02,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953585000] [2021-11-23 03:21:02,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:21:02,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-23 03:21:02,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:21:02,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-23 03:21:02,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2534, Unknown=0, NotChecked=0, Total=2756 [2021-11-23 03:21:02,394 INFO L87 Difference]: Start difference. First operand 194 states and 227 transitions. Second operand has 53 states, 53 states have (on average 1.9245283018867925) internal successors, (102), 52 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) [2021-11-23 03:21:31,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:21:31,805 INFO L93 Difference]: Finished difference Result 350 states and 432 transitions. [2021-11-23 03:21:31,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-23 03:21:31,806 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9245283018867925) internal successors, (102), 52 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 [2021-11-23 03:21:31,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:21:31,810 INFO L225 Difference]: With dead ends: 350 [2021-11-23 03:21:31,810 INFO L226 Difference]: Without dead ends: 251 [2021-11-23 03:21:31,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 33.8s TimeCoverageRelationStatistics Valid=1926, Invalid=7194, Unknown=0, NotChecked=0, Total=9120 [2021-11-23 03:21:31,815 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 1290 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 2542 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1290 SdHoareTripleChecker+Valid, 1246 SdHoareTripleChecker+Invalid, 2639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 2542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:21:31,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1290 Valid, 1246 Invalid, 2639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 2542 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-23 03:21:31,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-23 03:21:31,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 244. [2021-11-23 03:21:31,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.205761316872428) internal successors, (293), 243 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:21:31,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 293 transitions. [2021-11-23 03:21:31,866 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 293 transitions. Word has length 102 [2021-11-23 03:21:31,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:21:31,867 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 293 transitions. [2021-11-23 03:21:31,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9245283018867925) internal successors, (102), 52 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) [2021-11-23 03:21:31,867 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 293 transitions. [2021-11-23 03:21:31,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 03:21:31,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:21:31,869 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:21:31,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 03:21:31,870 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:21:31,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:21:31,870 INFO L85 PathProgramCache]: Analyzing trace with hash -338848638, now seen corresponding path program 1 times [2021-11-23 03:21:31,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:21:31,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039237143] [2021-11-23 03:21:31,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:21:31,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:21:31,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:21:32,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:21:32,019 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:21:32,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039237143] [2021-11-23 03:21:32,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039237143] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:21:32,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:21:32,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:21:32,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164291163] [2021-11-23 03:21:32,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:21:32,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:21:32,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:21:32,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:21:32,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:21:32,023 INFO L87 Difference]: Start difference. First operand 244 states and 293 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 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) [2021-11-23 03:21:32,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:21:32,146 INFO L93 Difference]: Finished difference Result 492 states and 621 transitions. [2021-11-23 03:21:32,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:21:32,147 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 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 [2021-11-23 03:21:32,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:21:32,150 INFO L225 Difference]: With dead ends: 492 [2021-11-23 03:21:32,150 INFO L226 Difference]: Without dead ends: 343 [2021-11-23 03:21:32,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:21:32,152 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 148 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:21:32,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 338 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:21:32,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-11-23 03:21:32,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 341. [2021-11-23 03:21:32,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.238235294117647) internal successors, (421), 340 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:21:32,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 421 transitions. [2021-11-23 03:21:32,210 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 421 transitions. Word has length 102 [2021-11-23 03:21:32,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:21:32,210 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 421 transitions. [2021-11-23 03:21:32,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 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) [2021-11-23 03:21:32,211 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 421 transitions. [2021-11-23 03:21:32,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-23 03:21:32,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:21:32,212 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:21:32,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 03:21:32,213 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:21:32,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:21:32,213 INFO L85 PathProgramCache]: Analyzing trace with hash 876059039, now seen corresponding path program 1 times [2021-11-23 03:21:32,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:21:32,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471992738] [2021-11-23 03:21:32,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:21:32,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:21:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:21:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:21:32,330 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:21:32,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471992738] [2021-11-23 03:21:32,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471992738] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:21:32,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:21:32,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 03:21:32,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995993436] [2021-11-23 03:21:32,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:21:32,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:21:32,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:21:32,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:21:32,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:21:32,333 INFO L87 Difference]: Start difference. First operand 341 states and 421 transitions. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:21:32,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:21:32,635 INFO L93 Difference]: Finished difference Result 763 states and 976 transitions. [2021-11-23 03:21:32,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:21:32,635 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 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 103 [2021-11-23 03:21:32,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:21:32,640 INFO L225 Difference]: With dead ends: 763 [2021-11-23 03:21:32,640 INFO L226 Difference]: Without dead ends: 664 [2021-11-23 03:21:32,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:21:32,642 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 335 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:21:32,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 859 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:21:32,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-11-23 03:21:32,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 342. [2021-11-23 03:21:32,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.2316715542521994) internal successors, (420), 341 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:21:32,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 420 transitions. [2021-11-23 03:21:32,721 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 420 transitions. Word has length 103 [2021-11-23 03:21:32,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:21:32,721 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 420 transitions. [2021-11-23 03:21:32,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:21:32,722 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 420 transitions. [2021-11-23 03:21:32,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-23 03:21:32,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:21:32,724 INFO L514 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] [2021-11-23 03:21:32,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 03:21:32,725 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:21:32,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:21:32,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1649938, now seen corresponding path program 1 times [2021-11-23 03:21:32,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:21:32,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276537037] [2021-11-23 03:21:32,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:21:32,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:21:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:21:32,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:21:32,821 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:21:32,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276537037] [2021-11-23 03:21:32,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276537037] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:21:32,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:21:32,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:21:32,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017468284] [2021-11-23 03:21:32,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:21:32,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:21:32,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:21:32,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:21:32,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:21:32,826 INFO L87 Difference]: Start difference. First operand 342 states and 420 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) [2021-11-23 03:21:32,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:21:32,960 INFO L93 Difference]: Finished difference Result 627 states and 794 transitions. [2021-11-23 03:21:32,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:21:32,961 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 [2021-11-23 03:21:32,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:21:32,965 INFO L225 Difference]: With dead ends: 627 [2021-11-23 03:21:32,965 INFO L226 Difference]: Without dead ends: 430 [2021-11-23 03:21:32,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:21:32,967 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 57 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:21:32,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 328 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:21:32,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-11-23 03:21:33,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 412. [2021-11-23 03:21:33,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.2384428223844282) internal successors, (509), 411 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:21:33,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 509 transitions. [2021-11-23 03:21:33,045 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 509 transitions. Word has length 122 [2021-11-23 03:21:33,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:21:33,046 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 509 transitions. [2021-11-23 03:21:33,047 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) [2021-11-23 03:21:33,047 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 509 transitions. [2021-11-23 03:21:33,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-23 03:21:33,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:21:33,049 INFO L514 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] [2021-11-23 03:21:33,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 03:21:33,049 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:21:33,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:21:33,050 INFO L85 PathProgramCache]: Analyzing trace with hash 115641772, now seen corresponding path program 1 times [2021-11-23 03:21:33,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:21:33,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689426129] [2021-11-23 03:21:33,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:21:33,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:21:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:21:33,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:21:33,137 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:21:33,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689426129] [2021-11-23 03:21:33,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689426129] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:21:33,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:21:33,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:21:33,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080327926] [2021-11-23 03:21:33,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:21:33,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:21:33,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:21:33,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:21:33,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:21:33,142 INFO L87 Difference]: Start difference. First operand 412 states and 509 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) [2021-11-23 03:21:33,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:21:33,315 INFO L93 Difference]: Finished difference Result 864 states and 1106 transitions. [2021-11-23 03:21:33,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:21:33,316 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 [2021-11-23 03:21:33,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:21:33,321 INFO L225 Difference]: With dead ends: 864 [2021-11-23 03:21:33,321 INFO L226 Difference]: Without dead ends: 610 [2021-11-23 03:21:33,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:21:33,323 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 52 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:21:33,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 321 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:21:33,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-11-23 03:21:33,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 584. [2021-11-23 03:21:33,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 1.2590051457975986) internal successors, (734), 583 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:21:33,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 734 transitions. [2021-11-23 03:21:33,453 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 734 transitions. Word has length 125 [2021-11-23 03:21:33,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:21:33,453 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 734 transitions. [2021-11-23 03:21:33,454 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) [2021-11-23 03:21:33,454 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 734 transitions. [2021-11-23 03:21:33,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-23 03:21:33,456 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:21:33,456 INFO L514 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] [2021-11-23 03:21:33,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 03:21:33,457 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:21:33,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:21:33,457 INFO L85 PathProgramCache]: Analyzing trace with hash 418025434, now seen corresponding path program 1 times [2021-11-23 03:21:33,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:21:33,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159582483] [2021-11-23 03:21:33,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:21:33,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:21:33,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:21:33,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:21:33,547 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:21:33,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159582483] [2021-11-23 03:21:33,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159582483] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:21:33,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:21:33,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:21:33,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674992379] [2021-11-23 03:21:33,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:21:33,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:21:33,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:21:33,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:21:33,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:21:33,551 INFO L87 Difference]: Start difference. First operand 584 states and 734 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) [2021-11-23 03:21:33,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:21:33,766 INFO L93 Difference]: Finished difference Result 1380 states and 1783 transitions. [2021-11-23 03:21:33,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:21:33,767 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 [2021-11-23 03:21:33,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:21:33,774 INFO L225 Difference]: With dead ends: 1380 [2021-11-23 03:21:33,774 INFO L226 Difference]: Without dead ends: 960 [2021-11-23 03:21:33,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:21:33,777 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 47 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:21:33,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 314 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:21:33,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2021-11-23 03:21:33,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 922. [2021-11-23 03:21:33,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 1.275787187839305) internal successors, (1175), 921 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:21:33,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1175 transitions. [2021-11-23 03:21:33,967 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1175 transitions. Word has length 128 [2021-11-23 03:21:33,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:21:33,968 INFO L470 AbstractCegarLoop]: Abstraction has 922 states and 1175 transitions. [2021-11-23 03:21:33,968 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) [2021-11-23 03:21:33,969 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1175 transitions. [2021-11-23 03:21:33,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-23 03:21:33,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:21:33,972 INFO L514 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] [2021-11-23 03:21:33,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 03:21:33,973 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:21:33,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:21:33,973 INFO L85 PathProgramCache]: Analyzing trace with hash -2112775816, now seen corresponding path program 1 times [2021-11-23 03:21:33,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:21:33,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180499719] [2021-11-23 03:21:33,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:21:33,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:21:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:21:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:21:34,091 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:21:34,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180499719] [2021-11-23 03:21:34,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180499719] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:21:34,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:21:34,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:21:34,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332491430] [2021-11-23 03:21:34,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:21:34,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:21:34,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:21:34,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:21:34,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:21:34,094 INFO L87 Difference]: Start difference. First operand 922 states and 1175 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) [2021-11-23 03:21:34,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:21:34,420 INFO L93 Difference]: Finished difference Result 2394 states and 3108 transitions. [2021-11-23 03:21:34,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:21:34,421 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 [2021-11-23 03:21:34,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:21:34,432 INFO L225 Difference]: With dead ends: 2394 [2021-11-23 03:21:34,433 INFO L226 Difference]: Without dead ends: 1642 [2021-11-23 03:21:34,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:21:34,438 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 42 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:21:34,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 307 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:21:34,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2021-11-23 03:21:34,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1580. [2021-11-23 03:21:34,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 1.285623812539582) internal successors, (2030), 1579 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:21:34,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 2030 transitions. [2021-11-23 03:21:34,733 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 2030 transitions. Word has length 131 [2021-11-23 03:21:34,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:21:34,734 INFO L470 AbstractCegarLoop]: Abstraction has 1580 states and 2030 transitions. [2021-11-23 03:21:34,734 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) [2021-11-23 03:21:34,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 2030 transitions. [2021-11-23 03:21:34,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-23 03:21:34,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:21:34,736 INFO L514 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] [2021-11-23 03:21:34,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 03:21:34,737 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:21:34,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:21:34,738 INFO L85 PathProgramCache]: Analyzing trace with hash 440753557, now seen corresponding path program 1 times [2021-11-23 03:21:34,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:21:34,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568962793] [2021-11-23 03:21:34,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:21:34,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:21:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:21:34,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:21:34,836 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:21:34,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568962793] [2021-11-23 03:21:34,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568962793] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:21:34,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:21:34,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:21:34,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058924524] [2021-11-23 03:21:34,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:21:34,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:21:34,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:21:34,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:21:34,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:21:34,841 INFO L87 Difference]: Start difference. First operand 1580 states and 2030 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) [2021-11-23 03:21:35,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:21:35,397 INFO L93 Difference]: Finished difference Result 4368 states and 5675 transitions. [2021-11-23 03:21:35,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:21:35,398 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 [2021-11-23 03:21:35,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:21:35,419 INFO L225 Difference]: With dead ends: 4368 [2021-11-23 03:21:35,419 INFO L226 Difference]: Without dead ends: 2964 [2021-11-23 03:21:35,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:21:35,425 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 37 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:21:35,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 300 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:21:35,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2964 states. [2021-11-23 03:21:35,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2964 to 2854. [2021-11-23 03:21:35,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2854 states, 2853 states have (on average 1.2888187872415002) internal successors, (3677), 2853 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:21:35,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2854 states to 2854 states and 3677 transitions. [2021-11-23 03:21:35,993 INFO L78 Accepts]: Start accepts. Automaton has 2854 states and 3677 transitions. Word has length 134 [2021-11-23 03:21:35,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:21:35,994 INFO L470 AbstractCegarLoop]: Abstraction has 2854 states and 3677 transitions. [2021-11-23 03:21:35,994 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) [2021-11-23 03:21:35,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2854 states and 3677 transitions. [2021-11-23 03:21:35,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-23 03:21:35,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:21:35,996 INFO L514 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] [2021-11-23 03:21:35,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 03:21:35,997 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:21:35,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:21:35,998 INFO L85 PathProgramCache]: Analyzing trace with hash -894697835, now seen corresponding path program 1 times [2021-11-23 03:21:35,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:21:35,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630845833] [2021-11-23 03:21:35,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:21:35,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:21:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:21:36,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:21:36,085 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:21:36,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630845833] [2021-11-23 03:21:36,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630845833] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:21:36,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:21:36,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:21:36,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835640636] [2021-11-23 03:21:36,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:21:36,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:21:36,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:21:36,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:21:36,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:21:36,089 INFO L87 Difference]: Start difference. First operand 2854 states and 3677 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) [2021-11-23 03:21:36,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:21:36,989 INFO L93 Difference]: Finished difference Result 8190 states and 10618 transitions. [2021-11-23 03:21:36,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:21:36,990 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 [2021-11-23 03:21:36,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:21:37,019 INFO L225 Difference]: With dead ends: 8190 [2021-11-23 03:21:37,019 INFO L226 Difference]: Without dead ends: 5518 [2021-11-23 03:21:37,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:21:37,026 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 32 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:21:37,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 293 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:21:37,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5518 states. [2021-11-23 03:21:37,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5518 to 5312. [2021-11-23 03:21:37,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5312 states, 5311 states have (on average 1.2871398983242328) internal successors, (6836), 5311 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:21:37,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5312 states to 5312 states and 6836 transitions. [2021-11-23 03:21:37,930 INFO L78 Accepts]: Start accepts. Automaton has 5312 states and 6836 transitions. Word has length 137 [2021-11-23 03:21:37,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:21:37,931 INFO L470 AbstractCegarLoop]: Abstraction has 5312 states and 6836 transitions. [2021-11-23 03:21:37,931 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) [2021-11-23 03:21:37,931 INFO L276 IsEmpty]: Start isEmpty. Operand 5312 states and 6836 transitions. [2021-11-23 03:21:37,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-23 03:21:37,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:21:37,934 INFO L514 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, 1, 1, 1] [2021-11-23 03:21:37,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 03:21:37,934 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:21:37,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:21:37,935 INFO L85 PathProgramCache]: Analyzing trace with hash -942328234, now seen corresponding path program 1 times [2021-11-23 03:21:37,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:21:37,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536172595] [2021-11-23 03:21:37,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:21:37,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:21:37,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:21:38,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:21:38,025 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:21:38,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536172595] [2021-11-23 03:21:38,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536172595] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:21:38,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:21:38,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:21:38,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903800772] [2021-11-23 03:21:38,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:21:38,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:21:38,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:21:38,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:21:38,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:21:38,028 INFO L87 Difference]: Start difference. First operand 5312 states and 6836 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:21:40,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:21:40,038 INFO L93 Difference]: Finished difference Result 15606 states and 20144 transitions. [2021-11-23 03:21:40,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:21:40,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 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 140 [2021-11-23 03:21:40,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:21:40,102 INFO L225 Difference]: With dead ends: 15606 [2021-11-23 03:21:40,102 INFO L226 Difference]: Without dead ends: 10482 [2021-11-23 03:21:40,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:21:40,114 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 28 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:21:40,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 295 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:21:40,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10482 states. [2021-11-23 03:21:41,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10482 to 10084. [2021-11-23 03:21:41,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10084 states, 10083 states have (on average 1.2815630268769216) internal successors, (12922), 10083 states have internal predecessors, (12922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:21:41,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10084 states to 10084 states and 12922 transitions. [2021-11-23 03:21:41,573 INFO L78 Accepts]: Start accepts. Automaton has 10084 states and 12922 transitions. Word has length 140 [2021-11-23 03:21:41,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:21:41,574 INFO L470 AbstractCegarLoop]: Abstraction has 10084 states and 12922 transitions. [2021-11-23 03:21:41,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:21:41,574 INFO L276 IsEmpty]: Start isEmpty. Operand 10084 states and 12922 transitions. [2021-11-23 03:21:41,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-23 03:21:41,656 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:21:41,656 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-11-23 03:21:41,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 03:21:41,656 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:21:41,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:21:41,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1469423285, now seen corresponding path program 1 times [2021-11-23 03:21:41,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:21:41,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734657970] [2021-11-23 03:21:41,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:21:41,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:21:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:21:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:21:41,742 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:21:41,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734657970] [2021-11-23 03:21:41,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734657970] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:21:41,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:21:41,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:21:41,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807312137] [2021-11-23 03:21:41,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:21:41,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:21:41,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:21:41,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:21:41,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:21:41,746 INFO L87 Difference]: Start difference. First operand 10084 states and 12922 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:21:43,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:21:43,455 INFO L93 Difference]: Finished difference Result 19986 states and 25648 transitions. [2021-11-23 03:21:43,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:21:43,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-23 03:21:43,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:21:43,510 INFO L225 Difference]: With dead ends: 19986 [2021-11-23 03:21:43,511 INFO L226 Difference]: Without dead ends: 10043 [2021-11-23 03:21:43,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:21:43,525 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 61 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:21:43,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 337 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:21:43,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10043 states. [2021-11-23 03:21:44,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10043 to 8857. [2021-11-23 03:21:44,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8857 states, 8856 states have (on average 1.2679539295392954) internal successors, (11229), 8856 states have internal predecessors, (11229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:21:44,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8857 states to 8857 states and 11229 transitions. [2021-11-23 03:21:44,815 INFO L78 Accepts]: Start accepts. Automaton has 8857 states and 11229 transitions. Word has length 143 [2021-11-23 03:21:44,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:21:44,816 INFO L470 AbstractCegarLoop]: Abstraction has 8857 states and 11229 transitions. [2021-11-23 03:21:44,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:21:44,816 INFO L276 IsEmpty]: Start isEmpty. Operand 8857 states and 11229 transitions. [2021-11-23 03:21:44,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-23 03:21:44,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:21:44,820 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:21:44,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 03:21:44,820 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:21:44,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:21:44,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1571198607, now seen corresponding path program 1 times [2021-11-23 03:21:44,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:21:44,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211634620] [2021-11-23 03:21:44,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:21:44,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:21:45,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:30:57,725 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:30:57,726 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:30:57,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211634620] [2021-11-23 03:30:57,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211634620] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:30:57,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343780834] [2021-11-23 03:30:57,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:30:57,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:30:57,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cebf87e6-0760-4a41-af80-6de15f53c5ec/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:30:57,730 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cebf87e6-0760-4a41-af80-6de15f53c5ec/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:30:57,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cebf87e6-0760-4a41-af80-6de15f53c5ec/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:30:59,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:30:59,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 189 conjunts are in the unsatisfiable core [2021-11-23 03:30:59,186 INFO L286 TraceCheckSpWp]: Computing forward predicates...