./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb516fb-2b7c-4957-9e9d-fcf08cadf1de/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb516fb-2b7c-4957-9e9d-fcf08cadf1de/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb516fb-2b7c-4957-9e9d-fcf08cadf1de/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb516fb-2b7c-4957-9e9d-fcf08cadf1de/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb516fb-2b7c-4957-9e9d-fcf08cadf1de/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb516fb-2b7c-4957-9e9d-fcf08cadf1de/bin/utaipan-vmNK8stdcF --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 fe928253903b53f54ebedf490d9fbda0197f21d364e7cf3f1232104480e6242f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:26:23,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:26:23,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:26:24,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:26:24,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:26:24,023 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:26:24,025 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:26:24,028 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:26:24,030 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:26:24,032 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:26:24,033 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:26:24,035 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:26:24,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:26:24,037 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:26:24,039 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:26:24,041 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:26:24,042 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:26:24,044 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:26:24,046 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:26:24,049 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:26:24,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:26:24,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:26:24,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:26:24,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:26:24,060 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:26:24,061 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:26:24,061 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:26:24,063 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:26:24,063 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:26:24,065 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:26:24,065 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:26:24,066 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:26:24,068 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:26:24,069 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:26:24,070 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:26:24,071 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:26:24,072 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:26:24,072 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:26:24,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:26:24,074 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:26:24,074 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:26:24,075 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb516fb-2b7c-4957-9e9d-fcf08cadf1de/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:26:24,101 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:26:24,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:26:24,102 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:26:24,103 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:26:24,103 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:26:24,103 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:26:24,103 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:26:24,104 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:26:24,104 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:26:24,104 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:26:24,104 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:26:24,105 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:26:24,105 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:26:24,105 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:26:24,105 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:26:24,106 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:26:24,106 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:26:24,107 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:26:24,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:26:24,107 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:26:24,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:26:24,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:26:24,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:26:24,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:26:24,108 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:26:24,109 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:26:24,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:26:24,109 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:26:24,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:26:24,109 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:26:24,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:26:24,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:26:24,110 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:26:24,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:26:24,111 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:26:24,111 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:26:24,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:26:24,111 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:26:24,112 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:26:24,112 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:26:24,112 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_2bb516fb-2b7c-4957-9e9d-fcf08cadf1de/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb516fb-2b7c-4957-9e9d-fcf08cadf1de/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe928253903b53f54ebedf490d9fbda0197f21d364e7cf3f1232104480e6242f [2021-11-12 23:26:24,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:26:24,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:26:24,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:26:24,406 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:26:24,407 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:26:24,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb516fb-2b7c-4957-9e9d-fcf08cadf1de/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-11-12 23:26:24,489 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb516fb-2b7c-4957-9e9d-fcf08cadf1de/bin/utaipan-vmNK8stdcF/data/bb8ca40c9/f5bee6554e264e79bc4e865971bf820b/FLAGf24a66118 [2021-11-12 23:26:25,078 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:26:25,078 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb516fb-2b7c-4957-9e9d-fcf08cadf1de/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-11-12 23:26:25,100 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb516fb-2b7c-4957-9e9d-fcf08cadf1de/bin/utaipan-vmNK8stdcF/data/bb8ca40c9/f5bee6554e264e79bc4e865971bf820b/FLAGf24a66118 [2021-11-12 23:26:25,335 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb516fb-2b7c-4957-9e9d-fcf08cadf1de/bin/utaipan-vmNK8stdcF/data/bb8ca40c9/f5bee6554e264e79bc4e865971bf820b [2021-11-12 23:26:25,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:26:25,339 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:26:25,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:26:25,341 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:26:25,344 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:26:25,345 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:26:25" (1/1) ... [2021-11-12 23:26:25,346 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59f78a5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:26:25, skipping insertion in model container [2021-11-12 23:26:25,346 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:26:25" (1/1) ... [2021-11-12 23:26:25,353 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:26:25,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:26:25,740 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb516fb-2b7c-4957-9e9d-fcf08cadf1de/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[12834,12847] [2021-11-12 23:26:25,842 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:26:25,861 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:26:25,960 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb516fb-2b7c-4957-9e9d-fcf08cadf1de/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[12834,12847] [2021-11-12 23:26:26,032 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:26:26,050 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:26:26,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:26:26 WrapperNode [2021-11-12 23:26:26,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:26:26,052 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:26:26,052 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:26:26,052 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:26:26,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:26:26" (1/1) ... [2021-11-12 23:26:26,078 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:26:26" (1/1) ... [2021-11-12 23:26:26,163 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:26:26,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:26:26,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:26:26,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:26:26,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:26:26" (1/1) ... [2021-11-12 23:26:26,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:26:26" (1/1) ... [2021-11-12 23:26:26,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:26:26" (1/1) ... [2021-11-12 23:26:26,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:26:26" (1/1) ... [2021-11-12 23:26:26,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:26:26" (1/1) ... [2021-11-12 23:26:26,227 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:26:26" (1/1) ... [2021-11-12 23:26:26,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:26:26" (1/1) ... [2021-11-12 23:26:26,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:26:26,271 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:26:26,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:26:26,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:26:26,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:26:26" (1/1) ... [2021-11-12 23:26:26,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:26:26,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb516fb-2b7c-4957-9e9d-fcf08cadf1de/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:26:26,302 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb516fb-2b7c-4957-9e9d-fcf08cadf1de/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:26:26,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb516fb-2b7c-4957-9e9d-fcf08cadf1de/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:26:26,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:26:26,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:26:26,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:26:26,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:26:27,848 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:26:27,848 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 23:26:27,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:26:27 BoogieIcfgContainer [2021-11-12 23:26:27,853 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:26:27,856 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:26:27,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:26:27,859 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:26:27,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:26:25" (1/3) ... [2021-11-12 23:26:27,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@233083c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:26:27, skipping insertion in model container [2021-11-12 23:26:27,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:26:26" (2/3) ... [2021-11-12 23:26:27,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@233083c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:26:27, skipping insertion in model container [2021-11-12 23:26:27,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:26:27" (3/3) ... [2021-11-12 23:26:27,863 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.3.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2021-11-12 23:26:27,872 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:26:27,872 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:26:27,939 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:26:27,950 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 [2021-11-12 23:26:27,950 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:26:27,981 INFO L276 IsEmpty]: Start isEmpty. Operand has 256 states, 254 states have (on average 1.6811023622047243) internal successors, (427), 255 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:28,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-12 23:26:28,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:28,009 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] [2021-11-12 23:26:28,009 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:28,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:28,014 INFO L85 PathProgramCache]: Analyzing trace with hash -931180938, now seen corresponding path program 1 times [2021-11-12 23:26:28,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:28,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542354435] [2021-11-12 23:26:28,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:28,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:28,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:28,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:26:28,530 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:26:28,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542354435] [2021-11-12 23:26:28,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542354435] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:28,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:28,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:26:28,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581095759] [2021-11-12 23:26:28,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:28,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:26:28,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:26:28,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:26:28,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:26:28,583 INFO L87 Difference]: Start difference. First operand has 256 states, 254 states have (on average 1.6811023622047243) internal successors, (427), 255 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 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) [2021-11-12 23:26:28,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:28,827 INFO L93 Difference]: Finished difference Result 423 states and 696 transitions. [2021-11-12 23:26:28,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:26:28,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 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 [2021-11-12 23:26:28,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:28,855 INFO L225 Difference]: With dead ends: 423 [2021-11-12 23:26:28,855 INFO L226 Difference]: Without dead ends: 327 [2021-11-12 23:26:28,859 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 [2021-11-12 23:26:28,865 INFO L933 BasicCegarLoop]: 505 mSDtfsCounter, 148 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 100.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.83ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 122.32ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:28,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 862 Invalid, 71 Unknown, 0 Unchecked, 22.83ms Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 122.32ms Time] [2021-11-12 23:26:28,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-11-12 23:26:28,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 325. [2021-11-12 23:26:28,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 1.5339506172839505) internal successors, (497), 324 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:28,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 497 transitions. [2021-11-12 23:26:28,971 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 497 transitions. Word has length 102 [2021-11-12 23:26:28,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:28,972 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 497 transitions. [2021-11-12 23:26:28,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 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) [2021-11-12 23:26:28,978 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 497 transitions. [2021-11-12 23:26:28,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-12 23:26:28,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:28,989 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:28,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:26:28,990 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:28,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:28,992 INFO L85 PathProgramCache]: Analyzing trace with hash -807122640, now seen corresponding path program 1 times [2021-11-12 23:26:28,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:28,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598539302] [2021-11-12 23:26:28,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:28,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:29,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:26:29,266 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:26:29,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598539302] [2021-11-12 23:26:29,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598539302] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:29,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:29,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:26:29,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004472362] [2021-11-12 23:26:29,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:29,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:26:29,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:26:29,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:26:29,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:26:29,270 INFO L87 Difference]: Start difference. First operand 325 states and 497 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:29,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:29,422 INFO L93 Difference]: Finished difference Result 577 states and 903 transitions. [2021-11-12 23:26:29,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:26:29,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 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 104 [2021-11-12 23:26:29,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:29,429 INFO L225 Difference]: With dead ends: 577 [2021-11-12 23:26:29,429 INFO L226 Difference]: Without dead ends: 416 [2021-11-12 23:26:29,437 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 [2021-11-12 23:26:29,439 INFO L933 BasicCegarLoop]: 347 mSDtfsCounter, 136 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 93.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.11ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 115.46ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:29,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 657 Invalid, 75 Unknown, 0 Unchecked, 3.11ms Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 115.46ms Time] [2021-11-12 23:26:29,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-11-12 23:26:29,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 414. [2021-11-12 23:26:29,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.5423728813559323) internal successors, (637), 413 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:29,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 637 transitions. [2021-11-12 23:26:29,465 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 637 transitions. Word has length 104 [2021-11-12 23:26:29,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:29,466 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 637 transitions. [2021-11-12 23:26:29,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:29,466 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 637 transitions. [2021-11-12 23:26:29,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-12 23:26:29,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:29,468 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:29,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 23:26:29,469 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:29,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:29,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1007750748, now seen corresponding path program 1 times [2021-11-12 23:26:29,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:29,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686319869] [2021-11-12 23:26:29,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:29,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:29,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:29,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:26:29,562 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:26:29,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686319869] [2021-11-12 23:26:29,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686319869] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:29,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:29,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:26:29,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737320271] [2021-11-12 23:26:29,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:29,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:26:29,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:26:29,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:26:29,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:26:29,565 INFO L87 Difference]: Start difference. First operand 414 states and 637 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:29,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:29,703 INFO L93 Difference]: Finished difference Result 859 states and 1354 transitions. [2021-11-12 23:26:29,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:26:29,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-11-12 23:26:29,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:29,709 INFO L225 Difference]: With dead ends: 859 [2021-11-12 23:26:29,709 INFO L226 Difference]: Without dead ends: 611 [2021-11-12 23:26:29,711 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 [2021-11-12 23:26:29,720 INFO L933 BasicCegarLoop]: 428 mSDtfsCounter, 136 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 82.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.29ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 99.06ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:29,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 747 Invalid, 67 Unknown, 0 Unchecked, 2.29ms Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 99.06ms Time] [2021-11-12 23:26:29,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-11-12 23:26:29,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 609. [2021-11-12 23:26:29,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 608 states have (on average 1.5641447368421053) internal successors, (951), 608 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:29,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 951 transitions. [2021-11-12 23:26:29,807 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 951 transitions. Word has length 107 [2021-11-12 23:26:29,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:29,809 INFO L470 AbstractCegarLoop]: Abstraction has 609 states and 951 transitions. [2021-11-12 23:26:29,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:29,810 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 951 transitions. [2021-11-12 23:26:29,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-12 23:26:29,818 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:29,819 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:29,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 23:26:29,820 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:29,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:29,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1771710272, now seen corresponding path program 1 times [2021-11-12 23:26:29,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:29,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964746848] [2021-11-12 23:26:29,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:29,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:29,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:29,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:26:29,975 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:26:29,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964746848] [2021-11-12 23:26:29,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964746848] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:29,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:29,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:26:29,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392174781] [2021-11-12 23:26:29,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:29,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:26:29,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:26:29,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:26:29,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:26:29,981 INFO L87 Difference]: Start difference. First operand 609 states and 951 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:30,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:30,140 INFO L93 Difference]: Finished difference Result 1318 states and 2090 transitions. [2021-11-12 23:26:30,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:26:30,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 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 109 [2021-11-12 23:26:30,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:30,149 INFO L225 Difference]: With dead ends: 1318 [2021-11-12 23:26:30,150 INFO L226 Difference]: Without dead ends: 875 [2021-11-12 23:26:30,152 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 [2021-11-12 23:26:30,160 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 135 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 83.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.30ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.84ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:30,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 673 Invalid, 63 Unknown, 0 Unchecked, 2.30ms Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 101.84ms Time] [2021-11-12 23:26:30,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-11-12 23:26:30,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 873. [2021-11-12 23:26:30,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 1.5745412844036697) internal successors, (1373), 872 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:30,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1373 transitions. [2021-11-12 23:26:30,227 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1373 transitions. Word has length 109 [2021-11-12 23:26:30,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:30,228 INFO L470 AbstractCegarLoop]: Abstraction has 873 states and 1373 transitions. [2021-11-12 23:26:30,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:30,228 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1373 transitions. [2021-11-12 23:26:30,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-12 23:26:30,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:30,230 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:30,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-12 23:26:30,231 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:30,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:30,232 INFO L85 PathProgramCache]: Analyzing trace with hash -328915782, now seen corresponding path program 1 times [2021-11-12 23:26:30,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:30,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219194019] [2021-11-12 23:26:30,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:30,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:30,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:30,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:26:30,354 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:26:30,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219194019] [2021-11-12 23:26:30,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219194019] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:30,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:30,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:26:30,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993268163] [2021-11-12 23:26:30,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:30,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:26:30,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:26:30,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:26:30,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:26:30,359 INFO L87 Difference]: Start difference. First operand 873 states and 1373 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:30,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:30,521 INFO L93 Difference]: Finished difference Result 2098 states and 3346 transitions. [2021-11-12 23:26:30,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:26:30,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 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 112 [2021-11-12 23:26:30,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:30,530 INFO L225 Difference]: With dead ends: 2098 [2021-11-12 23:26:30,531 INFO L226 Difference]: Without dead ends: 1409 [2021-11-12 23:26:30,532 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 [2021-11-12 23:26:30,533 INFO L933 BasicCegarLoop]: 400 mSDtfsCounter, 130 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 81.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.09ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 95.09ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:30,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 720 Invalid, 67 Unknown, 0 Unchecked, 2.09ms Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 95.09ms Time] [2021-11-12 23:26:30,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2021-11-12 23:26:30,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 1407. [2021-11-12 23:26:30,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1407 states, 1406 states have (on average 1.5846372688477952) internal successors, (2228), 1406 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:30,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1407 states to 1407 states and 2228 transitions. [2021-11-12 23:26:30,609 INFO L78 Accepts]: Start accepts. Automaton has 1407 states and 2228 transitions. Word has length 112 [2021-11-12 23:26:30,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:30,613 INFO L470 AbstractCegarLoop]: Abstraction has 1407 states and 2228 transitions. [2021-11-12 23:26:30,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:30,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1407 states and 2228 transitions. [2021-11-12 23:26:30,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-12 23:26:30,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:30,616 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:30,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-12 23:26:30,616 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:30,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:30,622 INFO L85 PathProgramCache]: Analyzing trace with hash -659507780, now seen corresponding path program 1 times [2021-11-12 23:26:30,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:30,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357978758] [2021-11-12 23:26:30,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:30,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:30,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:30,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:26:30,745 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:26:30,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357978758] [2021-11-12 23:26:30,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357978758] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:30,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:30,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:26:30,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838236288] [2021-11-12 23:26:30,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:30,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:26:30,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:26:30,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:26:30,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:26:30,748 INFO L87 Difference]: Start difference. First operand 1407 states and 2228 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:30,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:30,938 INFO L93 Difference]: Finished difference Result 3337 states and 5326 transitions. [2021-11-12 23:26:30,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:26:30,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-12 23:26:30,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:30,952 INFO L225 Difference]: With dead ends: 3337 [2021-11-12 23:26:30,952 INFO L226 Difference]: Without dead ends: 2114 [2021-11-12 23:26:30,955 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 [2021-11-12 23:26:30,957 INFO L933 BasicCegarLoop]: 357 mSDtfsCounter, 129 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.13ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78.60ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:30,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 675 Invalid, 63 Unknown, 0 Unchecked, 2.13ms Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 78.60ms Time] [2021-11-12 23:26:30,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2021-11-12 23:26:31,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 2112. [2021-11-12 23:26:31,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2112 states, 2111 states have (on average 1.5883467550923733) internal successors, (3353), 2111 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:31,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 3353 transitions. [2021-11-12 23:26:31,096 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 3353 transitions. Word has length 114 [2021-11-12 23:26:31,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:31,096 INFO L470 AbstractCegarLoop]: Abstraction has 2112 states and 3353 transitions. [2021-11-12 23:26:31,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:31,097 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 3353 transitions. [2021-11-12 23:26:31,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-12 23:26:31,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:31,099 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:31,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-12 23:26:31,099 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:31,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:31,100 INFO L85 PathProgramCache]: Analyzing trace with hash -348180324, now seen corresponding path program 1 times [2021-11-12 23:26:31,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:31,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205011262] [2021-11-12 23:26:31,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:31,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:31,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:26:31,176 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:26:31,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205011262] [2021-11-12 23:26:31,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205011262] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:31,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:31,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:26:31,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268249526] [2021-11-12 23:26:31,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:31,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:26:31,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:26:31,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:26:31,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:26:31,179 INFO L87 Difference]: Start difference. First operand 2112 states and 3353 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:31,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:31,462 INFO L93 Difference]: Finished difference Result 5473 states and 8746 transitions. [2021-11-12 23:26:31,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:26:31,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 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 117 [2021-11-12 23:26:31,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:31,485 INFO L225 Difference]: With dead ends: 5473 [2021-11-12 23:26:31,486 INFO L226 Difference]: Without dead ends: 3563 [2021-11-12 23:26:31,490 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 [2021-11-12 23:26:31,491 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 124 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 66.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.08ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 87.98ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:31,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 693 Invalid, 67 Unknown, 0 Unchecked, 2.08ms Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 87.98ms Time] [2021-11-12 23:26:31,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2021-11-12 23:26:31,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 3561. [2021-11-12 23:26:31,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3560 states have (on average 1.5890449438202248) internal successors, (5657), 3560 states have internal predecessors, (5657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:31,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 5657 transitions. [2021-11-12 23:26:31,742 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 5657 transitions. Word has length 117 [2021-11-12 23:26:31,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:31,742 INFO L470 AbstractCegarLoop]: Abstraction has 3561 states and 5657 transitions. [2021-11-12 23:26:31,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:31,743 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 5657 transitions. [2021-11-12 23:26:31,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-12 23:26:31,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:31,745 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:31,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-12 23:26:31,746 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:31,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:31,747 INFO L85 PathProgramCache]: Analyzing trace with hash -582704553, now seen corresponding path program 1 times [2021-11-12 23:26:31,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:31,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467611028] [2021-11-12 23:26:31,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:31,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:31,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:26:31,813 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:26:31,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467611028] [2021-11-12 23:26:31,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467611028] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:31,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:31,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:26:31,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50144774] [2021-11-12 23:26:31,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:31,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:26:31,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:26:31,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:26:31,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:26:31,815 INFO L87 Difference]: Start difference. First operand 3561 states and 5657 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:32,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:32,178 INFO L93 Difference]: Finished difference Result 8848 states and 14110 transitions. [2021-11-12 23:26:32,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:26:32,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-12 23:26:32,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:32,215 INFO L225 Difference]: With dead ends: 8848 [2021-11-12 23:26:32,215 INFO L226 Difference]: Without dead ends: 5489 [2021-11-12 23:26:32,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:26:32,223 INFO L933 BasicCegarLoop]: 358 mSDtfsCounter, 123 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 101.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.15ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 114.26ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:32,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 677 Invalid, 63 Unknown, 0 Unchecked, 2.15ms Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 114.26ms Time] [2021-11-12 23:26:32,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5489 states. [2021-11-12 23:26:32,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5489 to 5487. [2021-11-12 23:26:32,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5487 states, 5486 states have (on average 1.588953700328108) internal successors, (8717), 5486 states have internal predecessors, (8717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:32,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5487 states to 5487 states and 8717 transitions. [2021-11-12 23:26:32,636 INFO L78 Accepts]: Start accepts. Automaton has 5487 states and 8717 transitions. Word has length 119 [2021-11-12 23:26:32,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:32,637 INFO L470 AbstractCegarLoop]: Abstraction has 5487 states and 8717 transitions. [2021-11-12 23:26:32,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:32,638 INFO L276 IsEmpty]: Start isEmpty. Operand 5487 states and 8717 transitions. [2021-11-12 23:26:32,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-12 23:26:32,639 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:32,640 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:32,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-12 23:26:32,640 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:32,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:32,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1787106275, now seen corresponding path program 1 times [2021-11-12 23:26:32,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:32,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034024089] [2021-11-12 23:26:32,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:32,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:32,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:26:32,731 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:26:32,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034024089] [2021-11-12 23:26:32,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034024089] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:32,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:32,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:26:32,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202455252] [2021-11-12 23:26:32,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:32,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:26:32,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:26:32,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:26:32,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:26:32,736 INFO L87 Difference]: Start difference. First operand 5487 states and 8717 transitions. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 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) [2021-11-12 23:26:33,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:33,791 INFO L93 Difference]: Finished difference Result 13731 states and 21804 transitions. [2021-11-12 23:26:33,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:26:33,792 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 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 [2021-11-12 23:26:33,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:33,843 INFO L225 Difference]: With dead ends: 13731 [2021-11-12 23:26:33,843 INFO L226 Difference]: Without dead ends: 8464 [2021-11-12 23:26:33,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:26:33,854 INFO L933 BasicCegarLoop]: 359 mSDtfsCounter, 1046 mSDsluCounter, 2879 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 285.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1046 SdHoareTripleChecker+Valid, 3122 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.15ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 353.01ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:33,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1046 Valid, 3122 Invalid, 387 Unknown, 0 Unchecked, 14.15ms Time], IncrementalHoareTripleChecker [7 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 353.01ms Time] [2021-11-12 23:26:33,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8464 states. [2021-11-12 23:26:34,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8464 to 8450. [2021-11-12 23:26:34,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8450 states, 8449 states have (on average 1.57758314593443) internal successors, (13329), 8449 states have internal predecessors, (13329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:34,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8450 states to 8450 states and 13329 transitions. [2021-11-12 23:26:34,397 INFO L78 Accepts]: Start accepts. Automaton has 8450 states and 13329 transitions. Word has length 122 [2021-11-12 23:26:34,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:34,397 INFO L470 AbstractCegarLoop]: Abstraction has 8450 states and 13329 transitions. [2021-11-12 23:26:34,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 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) [2021-11-12 23:26:34,398 INFO L276 IsEmpty]: Start isEmpty. Operand 8450 states and 13329 transitions. [2021-11-12 23:26:34,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-12 23:26:34,399 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:34,399 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:34,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-12 23:26:34,400 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:34,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:34,400 INFO L85 PathProgramCache]: Analyzing trace with hash 367218292, now seen corresponding path program 1 times [2021-11-12 23:26:34,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:34,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980577431] [2021-11-12 23:26:34,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:34,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:34,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:26:34,483 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:26:34,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980577431] [2021-11-12 23:26:34,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980577431] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:34,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:34,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:26:34,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833773221] [2021-11-12 23:26:34,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:34,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:26:34,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:26:34,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:26:34,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:26:34,486 INFO L87 Difference]: Start difference. First operand 8450 states and 13329 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:35,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:35,101 INFO L93 Difference]: Finished difference Result 16682 states and 26340 transitions. [2021-11-12 23:26:35,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:26:35,101 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-12 23:26:35,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:35,133 INFO L225 Difference]: With dead ends: 16682 [2021-11-12 23:26:35,133 INFO L226 Difference]: Without dead ends: 8452 [2021-11-12 23:26:35,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:26:35,151 INFO L933 BasicCegarLoop]: 348 mSDtfsCounter, 256 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 79.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.26ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 100.46ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:35,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 1009 Invalid, 119 Unknown, 0 Unchecked, 3.26ms Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 100.46ms Time] [2021-11-12 23:26:35,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8452 states. [2021-11-12 23:26:35,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8452 to 8450. [2021-11-12 23:26:35,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8450 states, 8449 states have (on average 1.5735590010652147) internal successors, (13295), 8449 states have internal predecessors, (13295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:35,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8450 states to 8450 states and 13295 transitions. [2021-11-12 23:26:35,656 INFO L78 Accepts]: Start accepts. Automaton has 8450 states and 13295 transitions. Word has length 123 [2021-11-12 23:26:35,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:35,657 INFO L470 AbstractCegarLoop]: Abstraction has 8450 states and 13295 transitions. [2021-11-12 23:26:35,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:35,658 INFO L276 IsEmpty]: Start isEmpty. Operand 8450 states and 13295 transitions. [2021-11-12 23:26:35,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-12 23:26:35,659 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:35,660 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:35,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-12 23:26:35,660 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:35,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:35,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1563638844, now seen corresponding path program 1 times [2021-11-12 23:26:35,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:35,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127882977] [2021-11-12 23:26:35,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:35,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:35,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:26:35,725 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:26:35,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127882977] [2021-11-12 23:26:35,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127882977] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:35,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:35,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:26:35,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260611956] [2021-11-12 23:26:35,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:35,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:26:35,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:26:35,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:26:35,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:26:35,727 INFO L87 Difference]: Start difference. First operand 8450 states and 13295 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:36,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:36,326 INFO L93 Difference]: Finished difference Result 16682 states and 26272 transitions. [2021-11-12 23:26:36,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:26:36,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2021-11-12 23:26:36,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:36,347 INFO L225 Difference]: With dead ends: 16682 [2021-11-12 23:26:36,347 INFO L226 Difference]: Without dead ends: 8452 [2021-11-12 23:26:36,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:26:36,361 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 264 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 88.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.76ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 108.03ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:36,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 1015 Invalid, 120 Unknown, 0 Unchecked, 4.76ms Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 108.03ms Time] [2021-11-12 23:26:36,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8452 states. [2021-11-12 23:26:36,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8452 to 8450. [2021-11-12 23:26:36,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8450 states, 8449 states have (on average 1.5695348561959994) internal successors, (13261), 8449 states have internal predecessors, (13261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:36,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8450 states to 8450 states and 13261 transitions. [2021-11-12 23:26:36,855 INFO L78 Accepts]: Start accepts. Automaton has 8450 states and 13261 transitions. Word has length 124 [2021-11-12 23:26:36,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:36,856 INFO L470 AbstractCegarLoop]: Abstraction has 8450 states and 13261 transitions. [2021-11-12 23:26:36,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:36,856 INFO L276 IsEmpty]: Start isEmpty. Operand 8450 states and 13261 transitions. [2021-11-12 23:26:36,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-12 23:26:36,858 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:36,858 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:36,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-12 23:26:36,858 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:36,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:36,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1286109893, now seen corresponding path program 1 times [2021-11-12 23:26:36,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:36,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567566580] [2021-11-12 23:26:36,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:36,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:36,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:26:36,944 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:26:36,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567566580] [2021-11-12 23:26:36,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567566580] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:36,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:36,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:26:36,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99658854] [2021-11-12 23:26:36,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:36,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:26:36,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:26:36,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:26:36,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:26:36,947 INFO L87 Difference]: Start difference. First operand 8450 states and 13261 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 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) [2021-11-12 23:26:37,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:37,408 INFO L93 Difference]: Finished difference Result 16682 states and 26204 transitions. [2021-11-12 23:26:37,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:26:37,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 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 [2021-11-12 23:26:37,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:37,432 INFO L225 Difference]: With dead ends: 16682 [2021-11-12 23:26:37,432 INFO L226 Difference]: Without dead ends: 8452 [2021-11-12 23:26:37,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:26:37,450 INFO L933 BasicCegarLoop]: 353 mSDtfsCounter, 262 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 90.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.31ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 109.62ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:37,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 1018 Invalid, 119 Unknown, 0 Unchecked, 3.31ms Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 109.62ms Time] [2021-11-12 23:26:37,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8452 states. [2021-11-12 23:26:37,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8452 to 8450. [2021-11-12 23:26:37,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8450 states, 8449 states have (on average 1.5655107113267843) internal successors, (13227), 8449 states have internal predecessors, (13227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:37,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8450 states to 8450 states and 13227 transitions. [2021-11-12 23:26:37,977 INFO L78 Accepts]: Start accepts. Automaton has 8450 states and 13227 transitions. Word has length 125 [2021-11-12 23:26:37,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:37,978 INFO L470 AbstractCegarLoop]: Abstraction has 8450 states and 13227 transitions. [2021-11-12 23:26:37,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 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) [2021-11-12 23:26:37,979 INFO L276 IsEmpty]: Start isEmpty. Operand 8450 states and 13227 transitions. [2021-11-12 23:26:37,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-12 23:26:37,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:37,981 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:37,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-12 23:26:37,981 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:37,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:37,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1268088981, now seen corresponding path program 1 times [2021-11-12 23:26:37,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:37,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131617619] [2021-11-12 23:26:37,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:37,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:38,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:38,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:26:38,056 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:26:38,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131617619] [2021-11-12 23:26:38,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131617619] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:38,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:38,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:26:38,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997309691] [2021-11-12 23:26:38,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:38,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:26:38,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:26:38,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:26:38,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:26:38,059 INFO L87 Difference]: Start difference. First operand 8450 states and 13227 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:38,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:38,701 INFO L93 Difference]: Finished difference Result 16682 states and 26136 transitions. [2021-11-12 23:26:38,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:26:38,702 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2021-11-12 23:26:38,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:38,721 INFO L225 Difference]: With dead ends: 16682 [2021-11-12 23:26:38,721 INFO L226 Difference]: Without dead ends: 8452 [2021-11-12 23:26:38,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:26:38,735 INFO L933 BasicCegarLoop]: 354 mSDtfsCounter, 260 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 94.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.74ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 114.44ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:38,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 1021 Invalid, 118 Unknown, 0 Unchecked, 3.74ms Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 114.44ms Time] [2021-11-12 23:26:38,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8452 states. [2021-11-12 23:26:39,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8452 to 8450. [2021-11-12 23:26:39,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8450 states, 8449 states have (on average 1.561486566457569) internal successors, (13193), 8449 states have internal predecessors, (13193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:39,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8450 states to 8450 states and 13193 transitions. [2021-11-12 23:26:39,098 INFO L78 Accepts]: Start accepts. Automaton has 8450 states and 13193 transitions. Word has length 126 [2021-11-12 23:26:39,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:39,099 INFO L470 AbstractCegarLoop]: Abstraction has 8450 states and 13193 transitions. [2021-11-12 23:26:39,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:39,100 INFO L276 IsEmpty]: Start isEmpty. Operand 8450 states and 13193 transitions. [2021-11-12 23:26:39,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-12 23:26:39,101 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:39,102 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:39,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-12 23:26:39,102 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:39,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:39,103 INFO L85 PathProgramCache]: Analyzing trace with hash -380104196, now seen corresponding path program 1 times [2021-11-12 23:26:39,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:39,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262097310] [2021-11-12 23:26:39,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:39,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:39,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:26:39,282 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:26:39,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262097310] [2021-11-12 23:26:39,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262097310] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:39,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:39,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:26:39,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646761823] [2021-11-12 23:26:39,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:39,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:26:39,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:26:39,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:26:39,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:26:39,285 INFO L87 Difference]: Start difference. First operand 8450 states and 13193 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 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) [2021-11-12 23:26:40,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:40,131 INFO L93 Difference]: Finished difference Result 16682 states and 26068 transitions. [2021-11-12 23:26:40,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:26:40,132 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 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 [2021-11-12 23:26:40,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:40,156 INFO L225 Difference]: With dead ends: 16682 [2021-11-12 23:26:40,157 INFO L226 Difference]: Without dead ends: 8452 [2021-11-12 23:26:40,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:26:40,172 INFO L933 BasicCegarLoop]: 349 mSDtfsCounter, 553 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 175.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.37ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 208.95ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:40,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 1321 Invalid, 193 Unknown, 0 Unchecked, 6.37ms Time], IncrementalHoareTripleChecker [4 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 208.95ms Time] [2021-11-12 23:26:40,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8452 states. [2021-11-12 23:26:40,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8452 to 8450. [2021-11-12 23:26:40,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8450 states, 8449 states have (on average 1.559592851224997) internal successors, (13177), 8449 states have internal predecessors, (13177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:40,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8450 states to 8450 states and 13177 transitions. [2021-11-12 23:26:40,788 INFO L78 Accepts]: Start accepts. Automaton has 8450 states and 13177 transitions. Word has length 128 [2021-11-12 23:26:40,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:40,788 INFO L470 AbstractCegarLoop]: Abstraction has 8450 states and 13177 transitions. [2021-11-12 23:26:40,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 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) [2021-11-12 23:26:40,789 INFO L276 IsEmpty]: Start isEmpty. Operand 8450 states and 13177 transitions. [2021-11-12 23:26:40,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-12 23:26:40,791 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:40,791 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:40,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-12 23:26:40,792 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:40,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:40,792 INFO L85 PathProgramCache]: Analyzing trace with hash 96287021, now seen corresponding path program 1 times [2021-11-12 23:26:40,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:40,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865637990] [2021-11-12 23:26:40,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:40,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:40,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:26:40,990 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:26:40,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865637990] [2021-11-12 23:26:40,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865637990] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:40,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:40,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:26:40,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301947385] [2021-11-12 23:26:40,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:40,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:26:40,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:26:40,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:26:40,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:26:40,992 INFO L87 Difference]: Start difference. First operand 8450 states and 13177 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 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) [2021-11-12 23:26:41,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:41,818 INFO L93 Difference]: Finished difference Result 21010 states and 32666 transitions. [2021-11-12 23:26:41,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:26:41,818 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 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 [2021-11-12 23:26:41,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:41,845 INFO L225 Difference]: With dead ends: 21010 [2021-11-12 23:26:41,845 INFO L226 Difference]: Without dead ends: 12780 [2021-11-12 23:26:41,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:26:41,862 INFO L933 BasicCegarLoop]: 354 mSDtfsCounter, 441 mSDsluCounter, 1068 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 150.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 1350 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.73ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 178.89ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:41,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 1350 Invalid, 179 Unknown, 0 Unchecked, 4.73ms Time], IncrementalHoareTripleChecker [3 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 178.89ms Time] [2021-11-12 23:26:41,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12780 states. [2021-11-12 23:26:42,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12780 to 12778. [2021-11-12 23:26:42,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12778 states, 12777 states have (on average 1.5483290287234874) internal successors, (19783), 12777 states have internal predecessors, (19783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:42,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12778 states to 12778 states and 19783 transitions. [2021-11-12 23:26:42,510 INFO L78 Accepts]: Start accepts. Automaton has 12778 states and 19783 transitions. Word has length 131 [2021-11-12 23:26:42,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:42,510 INFO L470 AbstractCegarLoop]: Abstraction has 12778 states and 19783 transitions. [2021-11-12 23:26:42,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 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) [2021-11-12 23:26:42,511 INFO L276 IsEmpty]: Start isEmpty. Operand 12778 states and 19783 transitions. [2021-11-12 23:26:42,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-12 23:26:42,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:42,512 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:42,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-12 23:26:42,513 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:42,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:42,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1280072598, now seen corresponding path program 1 times [2021-11-12 23:26:42,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:42,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112896652] [2021-11-12 23:26:42,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:42,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:26:42,747 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:26:42,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112896652] [2021-11-12 23:26:42,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112896652] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:42,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:42,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:26:42,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521653700] [2021-11-12 23:26:42,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:42,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:26:42,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:26:42,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:26:42,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:26:42,751 INFO L87 Difference]: Start difference. First operand 12778 states and 19783 transitions. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:43,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:43,901 INFO L93 Difference]: Finished difference Result 15663 states and 24171 transitions. [2021-11-12 23:26:43,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:26:43,902 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-12 23:26:43,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:43,925 INFO L225 Difference]: With dead ends: 15663 [2021-11-12 23:26:43,925 INFO L226 Difference]: Without dead ends: 15661 [2021-11-12 23:26:43,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:26:43,931 INFO L933 BasicCegarLoop]: 571 mSDtfsCounter, 371 mSDsluCounter, 1390 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 169.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 1871 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.23ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 205.96ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:43,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 1871 Invalid, 211 Unknown, 0 Unchecked, 6.23ms Time], IncrementalHoareTripleChecker [2 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 205.96ms Time] [2021-11-12 23:26:43,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15661 states. [2021-11-12 23:26:44,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15661 to 12792. [2021-11-12 23:26:44,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12792 states, 12791 states have (on average 1.5461652724571964) internal successors, (19777), 12791 states have internal predecessors, (19777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:44,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12792 states to 12792 states and 19777 transitions. [2021-11-12 23:26:44,828 INFO L78 Accepts]: Start accepts. Automaton has 12792 states and 19777 transitions. Word has length 132 [2021-11-12 23:26:44,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:44,829 INFO L470 AbstractCegarLoop]: Abstraction has 12792 states and 19777 transitions. [2021-11-12 23:26:44,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:44,829 INFO L276 IsEmpty]: Start isEmpty. Operand 12792 states and 19777 transitions. [2021-11-12 23:26:44,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-12 23:26:44,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:44,832 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] [2021-11-12 23:26:44,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-12 23:26:44,833 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:44,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:44,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1339109496, now seen corresponding path program 1 times [2021-11-12 23:26:44,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:44,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528554606] [2021-11-12 23:26:44,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:44,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:46,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:26:46,283 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:26:46,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528554606] [2021-11-12 23:26:46,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528554606] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:26:46,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118794226] [2021-11-12 23:26:46,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:46,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:26:46,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb516fb-2b7c-4957-9e9d-fcf08cadf1de/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:26:46,290 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb516fb-2b7c-4957-9e9d-fcf08cadf1de/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:26:46,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb516fb-2b7c-4957-9e9d-fcf08cadf1de/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 23:26:46,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:46,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:26:46,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:47,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:26:47,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:47,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:26:47,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118794226] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:47,518 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:26:47,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [13] total 16 [2021-11-12 23:26:47,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025853645] [2021-11-12 23:26:47,519 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:47,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:26:47,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:26:47,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:26:47,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:26:47,521 INFO L87 Difference]: Start difference. First operand 12792 states and 19777 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:49,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:49,074 INFO L93 Difference]: Finished difference Result 37661 states and 58264 transitions. [2021-11-12 23:26:49,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:26:49,075 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-12 23:26:49,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:49,116 INFO L225 Difference]: With dead ends: 37661 [2021-11-12 23:26:49,116 INFO L226 Difference]: Without dead ends: 25087 [2021-11-12 23:26:49,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 278 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:26:49,134 INFO L933 BasicCegarLoop]: 406 mSDtfsCounter, 1421 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1421 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.95ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 92.29ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:49,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1421 Valid, 747 Invalid, 72 Unknown, 0 Unchecked, 5.95ms Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 92.29ms Time] [2021-11-12 23:26:49,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25087 states. [2021-11-12 23:26:50,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25087 to 25085. [2021-11-12 23:26:50,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25085 states, 25084 states have (on average 1.5424174772763515) internal successors, (38690), 25084 states have internal predecessors, (38690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:50,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25085 states to 25085 states and 38690 transitions. [2021-11-12 23:26:50,430 INFO L78 Accepts]: Start accepts. Automaton has 25085 states and 38690 transitions. Word has length 141 [2021-11-12 23:26:50,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:50,431 INFO L470 AbstractCegarLoop]: Abstraction has 25085 states and 38690 transitions. [2021-11-12 23:26:50,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:50,431 INFO L276 IsEmpty]: Start isEmpty. Operand 25085 states and 38690 transitions. [2021-11-12 23:26:50,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-12 23:26:50,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:50,434 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] [2021-11-12 23:26:50,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb516fb-2b7c-4957-9e9d-fcf08cadf1de/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:50,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb516fb-2b7c-4957-9e9d-fcf08cadf1de/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-12 23:26:50,662 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:50,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:50,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1095290833, now seen corresponding path program 1 times [2021-11-12 23:26:50,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:50,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284364684] [2021-11-12 23:26:50,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:50,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:50,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:26:50,734 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:26:50,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284364684] [2021-11-12 23:26:50,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284364684] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:50,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:50,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:26:50,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229347542] [2021-11-12 23:26:50,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:50,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:26:50,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:26:50,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:26:50,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:26:50,736 INFO L87 Difference]: Start difference. First operand 25085 states and 38690 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) [2021-11-12 23:26:53,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:53,313 INFO L93 Difference]: Finished difference Result 73633 states and 113624 transitions. [2021-11-12 23:26:53,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:26:53,314 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 [2021-11-12 23:26:53,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:53,404 INFO L225 Difference]: With dead ends: 73633 [2021-11-12 23:26:53,404 INFO L226 Difference]: Without dead ends: 48636 [2021-11-12 23:26:53,432 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 [2021-11-12 23:26:53,432 INFO L933 BasicCegarLoop]: 647 mSDtfsCounter, 246 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 85.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.98ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 105.20ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:53,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 982 Invalid, 99 Unknown, 0 Unchecked, 2.98ms Time], IncrementalHoareTripleChecker [7 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 105.20ms Time] [2021-11-12 23:26:53,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48636 states. [2021-11-12 23:26:56,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48636 to 48634. [2021-11-12 23:26:56,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48634 states, 48633 states have (on average 1.5358707050767997) internal successors, (74694), 48633 states have internal predecessors, (74694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:26:56,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48634 states to 48634 states and 74694 transitions. [2021-11-12 23:26:56,537 INFO L78 Accepts]: Start accepts. Automaton has 48634 states and 74694 transitions. Word has length 143 [2021-11-12 23:26:56,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:56,537 INFO L470 AbstractCegarLoop]: Abstraction has 48634 states and 74694 transitions. [2021-11-12 23:26:56,537 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) [2021-11-12 23:26:56,538 INFO L276 IsEmpty]: Start isEmpty. Operand 48634 states and 74694 transitions. [2021-11-12 23:26:56,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-12 23:26:56,540 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:56,540 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] [2021-11-12 23:26:56,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-12 23:26:56,540 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:56,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:56,541 INFO L85 PathProgramCache]: Analyzing trace with hash -536929762, now seen corresponding path program 1 times [2021-11-12 23:26:56,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:26:56,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387667714] [2021-11-12 23:26:56,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:56,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:26:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:56,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 23:26:56,590 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:26:56,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387667714] [2021-11-12 23:26:56,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387667714] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:56,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:56,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:26:56,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578787695] [2021-11-12 23:26:56,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:56,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:26:56,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:26:56,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:26:56,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:26:56,593 INFO L87 Difference]: Start difference. First operand 48634 states and 74694 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) [2021-11-12 23:27:02,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:02,321 INFO L93 Difference]: Finished difference Result 145809 states and 223932 transitions. [2021-11-12 23:27:02,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:27:02,322 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 143 [2021-11-12 23:27:02,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:02,532 INFO L225 Difference]: With dead ends: 145809 [2021-11-12 23:27:02,532 INFO L226 Difference]: Without dead ends: 97223 [2021-11-12 23:27:02,594 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 [2021-11-12 23:27:02,595 INFO L933 BasicCegarLoop]: 349 mSDtfsCounter, 319 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 95.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.91ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 113.56ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:02,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 690 Invalid, 68 Unknown, 0 Unchecked, 2.91ms Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 113.56ms Time] [2021-11-12 23:27:02,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97223 states. [2021-11-12 23:27:06,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97223 to 48648. [2021-11-12 23:27:06,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48648 states, 48647 states have (on average 1.5357987131786133) internal successors, (74712), 48647 states have internal predecessors, (74712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:06,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48648 states to 48648 states and 74712 transitions. [2021-11-12 23:27:06,614 INFO L78 Accepts]: Start accepts. Automaton has 48648 states and 74712 transitions. Word has length 143 [2021-11-12 23:27:06,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:06,614 INFO L470 AbstractCegarLoop]: Abstraction has 48648 states and 74712 transitions. [2021-11-12 23:27:06,614 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) [2021-11-12 23:27:06,615 INFO L276 IsEmpty]: Start isEmpty. Operand 48648 states and 74712 transitions. [2021-11-12 23:27:06,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-12 23:27:06,618 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:06,618 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, 1] [2021-11-12 23:27:06,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-12 23:27:06,619 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:27:06,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:06,619 INFO L85 PathProgramCache]: Analyzing trace with hash -955808200, now seen corresponding path program 1 times [2021-11-12 23:27:06,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:27:06,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503680507] [2021-11-12 23:27:06,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:27:06,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:27:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:27:08,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:27:08,846 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:27:08,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503680507] [2021-11-12 23:27:08,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503680507] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:27:08,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452293971] [2021-11-12 23:27:08,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:27:08,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:27:08,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb516fb-2b7c-4957-9e9d-fcf08cadf1de/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:27:08,848 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb516fb-2b7c-4957-9e9d-fcf08cadf1de/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:27:08,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bb516fb-2b7c-4957-9e9d-fcf08cadf1de/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-12 23:27:09,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:27:09,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:27:09,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:09,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:27:09,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:27:10,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452293971] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:27:10,020 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:27:10,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [13] total 16 [2021-11-12 23:27:10,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408379013] [2021-11-12 23:27:10,021 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:27:10,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:27:10,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:27:10,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:27:10,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:27:10,023 INFO L87 Difference]: Start difference. First operand 48648 states and 74712 transitions. Second operand has 5 states, 5 states have (on average 33.0) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:27:16,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:16,955 INFO L93 Difference]: Finished difference Result 144260 states and 221594 transitions. [2021-11-12 23:27:16,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:27:16,956 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-11-12 23:27:16,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:17,173 INFO L225 Difference]: With dead ends: 144260 [2021-11-12 23:27:17,173 INFO L226 Difference]: Without dead ends: 95722 [2021-11-12 23:27:17,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 284 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:27:17,233 INFO L933 BasicCegarLoop]: 391 mSDtfsCounter, 799 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 86.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.02ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 107.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:17,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [799 Valid, 724 Invalid, 82 Unknown, 0 Unchecked, 4.02ms Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 107.82ms Time] [2021-11-12 23:27:17,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95722 states.