./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31e623e-375a-4e33-86ae-27e7ba6788a8/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31e623e-375a-4e33-86ae-27e7ba6788a8/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31e623e-375a-4e33-86ae-27e7ba6788a8/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31e623e-375a-4e33-86ae-27e7ba6788a8/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31e623e-375a-4e33-86ae-27e7ba6788a8/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31e623e-375a-4e33-86ae-27e7ba6788a8/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a9066ec9ee7e14c7adf63eb106d945f26321fdd64b3726b0fe14ce5b202a77d4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:27:07,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:27:07,082 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:27:07,112 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:27:07,113 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:27:07,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:27:07,116 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:27:07,118 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:27:07,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:27:07,122 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:27:07,123 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:27:07,124 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:27:07,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:27:07,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:27:07,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:27:07,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:27:07,131 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:27:07,132 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:27:07,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:27:07,136 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:27:07,138 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:27:07,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:27:07,142 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:27:07,143 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:27:07,146 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:27:07,147 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:27:07,147 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:27:07,148 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:27:07,149 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:27:07,150 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:27:07,151 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:27:07,152 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:27:07,153 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:27:07,154 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:27:07,155 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:27:07,155 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:27:07,156 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:27:07,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:27:07,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:27:07,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:27:07,159 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:27:07,160 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31e623e-375a-4e33-86ae-27e7ba6788a8/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:27:07,187 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:27:07,187 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:27:07,187 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:27:07,187 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:27:07,188 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:27:07,188 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:27:07,189 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:27:07,189 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:27:07,189 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:27:07,189 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:27:07,189 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:27:07,190 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:27:07,190 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:27:07,190 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:27:07,190 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:27:07,190 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:27:07,191 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:27:07,191 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:27:07,192 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:27:07,192 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:27:07,192 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:27:07,192 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:27:07,193 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:27:07,193 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:27:07,193 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:27:07,193 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:27:07,193 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:27:07,194 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:27:07,194 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:27:07,194 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:27:07,194 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:27:07,194 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:27:07,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:27:07,195 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:27:07,195 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:27:07,195 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:27:07,196 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:27:07,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:27:07,196 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:27:07,196 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:27:07,196 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:27:07,197 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_b31e623e-375a-4e33-86ae-27e7ba6788a8/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31e623e-375a-4e33-86ae-27e7ba6788a8/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9066ec9ee7e14c7adf63eb106d945f26321fdd64b3726b0fe14ce5b202a77d4 [2021-11-21 00:27:07,456 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:27:07,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:27:07,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:27:07,490 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:27:07,491 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:27:07,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31e623e-375a-4e33-86ae-27e7ba6788a8/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-21 00:27:07,573 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31e623e-375a-4e33-86ae-27e7ba6788a8/bin/utaipan-TEXQjIfE4P/data/fdeb4db87/da497d28d76345e4876b6edcac7d9805/FLAG3da26e29b [2021-11-21 00:27:08,250 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:27:08,251 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31e623e-375a-4e33-86ae-27e7ba6788a8/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-21 00:27:08,277 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31e623e-375a-4e33-86ae-27e7ba6788a8/bin/utaipan-TEXQjIfE4P/data/fdeb4db87/da497d28d76345e4876b6edcac7d9805/FLAG3da26e29b [2021-11-21 00:27:08,417 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31e623e-375a-4e33-86ae-27e7ba6788a8/bin/utaipan-TEXQjIfE4P/data/fdeb4db87/da497d28d76345e4876b6edcac7d9805 [2021-11-21 00:27:08,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:27:08,424 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:27:08,425 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:27:08,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:27:08,429 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:27:08,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:27:08" (1/1) ... [2021-11-21 00:27:08,432 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2633492b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:08, skipping insertion in model container [2021-11-21 00:27:08,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:27:08" (1/1) ... [2021-11-21 00:27:08,444 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:27:08,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:27:08,991 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31e623e-375a-4e33-86ae-27e7ba6788a8/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[21939,21952] [2021-11-21 00:27:09,166 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:27:09,188 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:27:09,468 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31e623e-375a-4e33-86ae-27e7ba6788a8/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[21939,21952] [2021-11-21 00:27:09,563 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:27:09,589 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:27:09,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:09 WrapperNode [2021-11-21 00:27:09,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:27:09,590 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:27:09,591 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:27:09,591 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:27:09,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:09" (1/1) ... [2021-11-21 00:27:09,644 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:09" (1/1) ... [2021-11-21 00:27:09,761 INFO L137 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2781 [2021-11-21 00:27:09,761 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:27:09,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:27:09,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:27:09,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:27:09,772 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:09" (1/1) ... [2021-11-21 00:27:09,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:09" (1/1) ... [2021-11-21 00:27:09,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:09" (1/1) ... [2021-11-21 00:27:09,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:09" (1/1) ... [2021-11-21 00:27:09,814 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:09" (1/1) ... [2021-11-21 00:27:09,863 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:09" (1/1) ... [2021-11-21 00:27:09,875 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:09" (1/1) ... [2021-11-21 00:27:09,898 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:27:09,899 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:27:09,899 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:27:09,899 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:27:09,900 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:09" (1/1) ... [2021-11-21 00:27:09,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:27:09,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31e623e-375a-4e33-86ae-27e7ba6788a8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:27:09,938 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31e623e-375a-4e33-86ae-27e7ba6788a8/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:27:09,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31e623e-375a-4e33-86ae-27e7ba6788a8/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:27:09,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:27:09,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:27:09,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:27:09,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:27:10,272 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:27:10,274 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:27:12,110 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:27:12,821 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:27:12,821 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 00:27:12,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:27:12 BoogieIcfgContainer [2021-11-21 00:27:12,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:27:12,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:27:12,831 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:27:12,834 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:27:12,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:27:08" (1/3) ... [2021-11-21 00:27:12,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a45a3ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:27:12, skipping insertion in model container [2021-11-21 00:27:12,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:09" (2/3) ... [2021-11-21 00:27:12,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a45a3ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:27:12, skipping insertion in model container [2021-11-21 00:27:12,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:27:12" (3/3) ... [2021-11-21 00:27:12,839 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-21 00:27:12,847 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:27:12,847 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:27:12,919 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:27:12,926 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 00:27:12,926 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:27:12,956 INFO L276 IsEmpty]: Start isEmpty. Operand has 617 states, 615 states have (on average 1.7235772357723578) internal successors, (1060), 616 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:12,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-21 00:27:12,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:27:12,985 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:27:12,985 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:27:12,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:27:12,990 INFO L85 PathProgramCache]: Analyzing trace with hash 629525777, now seen corresponding path program 1 times [2021-11-21 00:27:12,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:27:12,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431873532] [2021-11-21 00:27:12,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:27:12,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:27:13,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:27:13,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:27:13,713 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:27:13,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431873532] [2021-11-21 00:27:13,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431873532] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:27:13,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:27:13,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:27:13,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468872850] [2021-11-21 00:27:13,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:27:13,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:27:13,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:27:13,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:27:13,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:27:13,773 INFO L87 Difference]: Start difference. First operand has 617 states, 615 states have (on average 1.7235772357723578) internal successors, (1060), 616 states have internal predecessors, (1060), 0 states have call successors, (0), 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 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:14,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:27:14,200 INFO L93 Difference]: Finished difference Result 865 states and 1459 transitions. [2021-11-21 00:27:14,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:27:14,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 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 192 [2021-11-21 00:27:14,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:27:14,233 INFO L225 Difference]: With dead ends: 865 [2021-11-21 00:27:14,233 INFO L226 Difference]: Without dead ends: 726 [2021-11-21 00:27:14,238 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 [2021-11-21 00:27:14,243 INFO L933 BasicCegarLoop]: 1163 mSDtfsCounter, 219 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 2106 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:27:14,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 2106 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:27:14,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2021-11-21 00:27:14,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 724. [2021-11-21 00:27:14,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 1.6251728907330567) internal successors, (1175), 723 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:14,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1175 transitions. [2021-11-21 00:27:14,365 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1175 transitions. Word has length 192 [2021-11-21 00:27:14,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:27:14,367 INFO L470 AbstractCegarLoop]: Abstraction has 724 states and 1175 transitions. [2021-11-21 00:27:14,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:14,367 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1175 transitions. [2021-11-21 00:27:14,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-21 00:27:14,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:27:14,376 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:27:14,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:27:14,376 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:27:14,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:27:14,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1948426669, now seen corresponding path program 1 times [2021-11-21 00:27:14,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:27:14,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809347438] [2021-11-21 00:27:14,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:27:14,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:27:14,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:27:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:27:14,693 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:27:14,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809347438] [2021-11-21 00:27:14,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809347438] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:27:14,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:27:14,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:27:14,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807293691] [2021-11-21 00:27:14,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:27:14,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:27:14,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:27:14,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:27:14,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:27:14,702 INFO L87 Difference]: Start difference. First operand 724 states and 1175 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:14,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:27:14,973 INFO L93 Difference]: Finished difference Result 1099 states and 1782 transitions. [2021-11-21 00:27:14,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:27:14,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2021-11-21 00:27:14,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:27:14,985 INFO L225 Difference]: With dead ends: 1099 [2021-11-21 00:27:14,985 INFO L226 Difference]: Without dead ends: 857 [2021-11-21 00:27:14,994 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 [2021-11-21 00:27:14,996 INFO L933 BasicCegarLoop]: 926 mSDtfsCounter, 207 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1802 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:27:14,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 1802 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:27:15,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2021-11-21 00:27:15,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 855. [2021-11-21 00:27:15,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 1.620608899297424) internal successors, (1384), 854 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:15,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1384 transitions. [2021-11-21 00:27:15,094 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1384 transitions. Word has length 194 [2021-11-21 00:27:15,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:27:15,099 INFO L470 AbstractCegarLoop]: Abstraction has 855 states and 1384 transitions. [2021-11-21 00:27:15,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:15,102 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1384 transitions. [2021-11-21 00:27:15,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-21 00:27:15,110 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:27:15,111 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:27:15,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:27:15,111 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:27:15,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:27:15,118 INFO L85 PathProgramCache]: Analyzing trace with hash 685172234, now seen corresponding path program 1 times [2021-11-21 00:27:15,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:27:15,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540518740] [2021-11-21 00:27:15,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:27:15,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:27:15,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:27:15,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:27:15,345 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:27:15,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540518740] [2021-11-21 00:27:15,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540518740] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:27:15,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:27:15,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:27:15,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368104790] [2021-11-21 00:27:15,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:27:15,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:27:15,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:27:15,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:27:15,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:27:15,349 INFO L87 Difference]: Start difference. First operand 855 states and 1384 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:15,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:27:15,642 INFO L93 Difference]: Finished difference Result 1533 states and 2481 transitions. [2021-11-21 00:27:15,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:27:15,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 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 198 [2021-11-21 00:27:15,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:27:15,655 INFO L225 Difference]: With dead ends: 1533 [2021-11-21 00:27:15,655 INFO L226 Difference]: Without dead ends: 1161 [2021-11-21 00:27:15,657 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 [2021-11-21 00:27:15,665 INFO L933 BasicCegarLoop]: 1061 mSDtfsCounter, 206 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 1950 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:27:15,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 1950 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:27:15,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-11-21 00:27:15,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 1159. [2021-11-21 00:27:15,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 1158 states have (on average 1.620034542314335) internal successors, (1876), 1158 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:15,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 1876 transitions. [2021-11-21 00:27:15,728 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 1876 transitions. Word has length 198 [2021-11-21 00:27:15,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:27:15,729 INFO L470 AbstractCegarLoop]: Abstraction has 1159 states and 1876 transitions. [2021-11-21 00:27:15,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:15,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 1876 transitions. [2021-11-21 00:27:15,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-21 00:27:15,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:27:15,733 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:27:15,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:27:15,734 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:27:15,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:27:15,734 INFO L85 PathProgramCache]: Analyzing trace with hash -660226734, now seen corresponding path program 1 times [2021-11-21 00:27:15,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:27:15,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079361993] [2021-11-21 00:27:15,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:27:15,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:27:15,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:27:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:27:15,936 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:27:15,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079361993] [2021-11-21 00:27:15,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079361993] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:27:15,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:27:15,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:27:15,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334062285] [2021-11-21 00:27:15,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:27:15,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:27:15,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:27:15,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:27:15,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:27:15,940 INFO L87 Difference]: Start difference. First operand 1159 states and 1876 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:16,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:27:16,219 INFO L93 Difference]: Finished difference Result 2230 states and 3605 transitions. [2021-11-21 00:27:16,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:27:16,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 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 200 [2021-11-21 00:27:16,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:27:16,231 INFO L225 Difference]: With dead ends: 2230 [2021-11-21 00:27:16,231 INFO L226 Difference]: Without dead ends: 1554 [2021-11-21 00:27:16,233 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 [2021-11-21 00:27:16,239 INFO L933 BasicCegarLoop]: 935 mSDtfsCounter, 205 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1818 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:27:16,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 1818 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:27:16,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2021-11-21 00:27:16,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1552. [2021-11-21 00:27:16,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1551 states have (on average 1.6170212765957446) internal successors, (2508), 1551 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:16,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 2508 transitions. [2021-11-21 00:27:16,323 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 2508 transitions. Word has length 200 [2021-11-21 00:27:16,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:27:16,324 INFO L470 AbstractCegarLoop]: Abstraction has 1552 states and 2508 transitions. [2021-11-21 00:27:16,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:16,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 2508 transitions. [2021-11-21 00:27:16,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-21 00:27:16,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:27:16,329 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:27:16,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:27:16,329 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:27:16,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:27:16,330 INFO L85 PathProgramCache]: Analyzing trace with hash -501088171, now seen corresponding path program 1 times [2021-11-21 00:27:16,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:27:16,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665248467] [2021-11-21 00:27:16,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:27:16,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:27:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:27:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:27:16,494 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:27:16,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665248467] [2021-11-21 00:27:16,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665248467] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:27:16,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:27:16,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:27:16,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730883745] [2021-11-21 00:27:16,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:27:16,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:27:16,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:27:16,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:27:16,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:27:16,497 INFO L87 Difference]: Start difference. First operand 1552 states and 2508 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:16,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:27:16,863 INFO L93 Difference]: Finished difference Result 3446 states and 5573 transitions. [2021-11-21 00:27:16,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:27:16,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 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 204 [2021-11-21 00:27:16,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:27:16,880 INFO L225 Difference]: With dead ends: 3446 [2021-11-21 00:27:16,881 INFO L226 Difference]: Without dead ends: 2400 [2021-11-21 00:27:16,883 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 [2021-11-21 00:27:16,886 INFO L933 BasicCegarLoop]: 1025 mSDtfsCounter, 199 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 1915 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:27:16,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 1915 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:27:16,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-11-21 00:27:17,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2398. [2021-11-21 00:27:17,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2397 states have (on average 1.6157697121401753) internal successors, (3873), 2397 states have internal predecessors, (3873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:17,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 3873 transitions. [2021-11-21 00:27:17,045 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 3873 transitions. Word has length 204 [2021-11-21 00:27:17,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:27:17,046 INFO L470 AbstractCegarLoop]: Abstraction has 2398 states and 3873 transitions. [2021-11-21 00:27:17,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:17,046 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 3873 transitions. [2021-11-21 00:27:17,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-21 00:27:17,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:27:17,052 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:27:17,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:27:17,052 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:27:17,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:27:17,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1506289072, now seen corresponding path program 1 times [2021-11-21 00:27:17,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:27:17,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057781449] [2021-11-21 00:27:17,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:27:17,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:27:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:27:17,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:27:17,209 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:27:17,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057781449] [2021-11-21 00:27:17,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057781449] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:27:17,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:27:17,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:27:17,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090723827] [2021-11-21 00:27:17,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:27:17,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:27:17,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:27:17,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:27:17,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:27:17,212 INFO L87 Difference]: Start difference. First operand 2398 states and 3873 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:17,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:27:17,621 INFO L93 Difference]: Finished difference Result 5359 states and 8653 transitions. [2021-11-21 00:27:17,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:27:17,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 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 206 [2021-11-21 00:27:17,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:27:17,643 INFO L225 Difference]: With dead ends: 5359 [2021-11-21 00:27:17,643 INFO L226 Difference]: Without dead ends: 3467 [2021-11-21 00:27:17,649 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 [2021-11-21 00:27:17,650 INFO L933 BasicCegarLoop]: 936 mSDtfsCounter, 198 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 1820 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:27:17,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 1820 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:27:17,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3467 states. [2021-11-21 00:27:17,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3467 to 3465. [2021-11-21 00:27:17,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3465 states, 3464 states have (on average 1.6131639722863742) internal successors, (5588), 3464 states have internal predecessors, (5588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:17,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3465 states to 3465 states and 5588 transitions. [2021-11-21 00:27:17,868 INFO L78 Accepts]: Start accepts. Automaton has 3465 states and 5588 transitions. Word has length 206 [2021-11-21 00:27:17,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:27:17,869 INFO L470 AbstractCegarLoop]: Abstraction has 3465 states and 5588 transitions. [2021-11-21 00:27:17,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:17,869 INFO L276 IsEmpty]: Start isEmpty. Operand 3465 states and 5588 transitions. [2021-11-21 00:27:17,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-21 00:27:17,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:27:17,873 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:27:17,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 00:27:17,874 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:27:17,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:27:17,874 INFO L85 PathProgramCache]: Analyzing trace with hash 816692557, now seen corresponding path program 1 times [2021-11-21 00:27:17,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:27:17,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757021993] [2021-11-21 00:27:17,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:27:17,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:27:17,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:27:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:27:18,008 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:27:18,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757021993] [2021-11-21 00:27:18,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757021993] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:27:18,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:27:18,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:27:18,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229568757] [2021-11-21 00:27:18,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:27:18,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:27:18,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:27:18,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:27:18,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:27:18,011 INFO L87 Difference]: Start difference. First operand 3465 states and 5588 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:18,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:27:18,633 INFO L93 Difference]: Finished difference Result 8743 states and 14113 transitions. [2021-11-21 00:27:18,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:27:18,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 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 210 [2021-11-21 00:27:18,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:27:18,668 INFO L225 Difference]: With dead ends: 8743 [2021-11-21 00:27:18,669 INFO L226 Difference]: Without dead ends: 5807 [2021-11-21 00:27:18,675 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 [2021-11-21 00:27:18,676 INFO L933 BasicCegarLoop]: 989 mSDtfsCounter, 192 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 1880 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:27:18,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 1880 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:27:18,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5807 states. [2021-11-21 00:27:19,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5807 to 5805. [2021-11-21 00:27:19,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5805 states, 5804 states have (on average 1.6109579600275672) internal successors, (9350), 5804 states have internal predecessors, (9350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:19,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5805 states to 5805 states and 9350 transitions. [2021-11-21 00:27:19,096 INFO L78 Accepts]: Start accepts. Automaton has 5805 states and 9350 transitions. Word has length 210 [2021-11-21 00:27:19,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:27:19,096 INFO L470 AbstractCegarLoop]: Abstraction has 5805 states and 9350 transitions. [2021-11-21 00:27:19,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:19,097 INFO L276 IsEmpty]: Start isEmpty. Operand 5805 states and 9350 transitions. [2021-11-21 00:27:19,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-21 00:27:19,100 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:27:19,101 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:27:19,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 00:27:19,101 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:27:19,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:27:19,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1707550700, now seen corresponding path program 1 times [2021-11-21 00:27:19,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:27:19,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810439536] [2021-11-21 00:27:19,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:27:19,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:27:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:27:19,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:27:19,208 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:27:19,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810439536] [2021-11-21 00:27:19,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810439536] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:27:19,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:27:19,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:27:19,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024937894] [2021-11-21 00:27:19,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:27:19,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:27:19,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:27:19,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:27:19,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:27:19,210 INFO L87 Difference]: Start difference. First operand 5805 states and 9350 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:19,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:27:19,959 INFO L93 Difference]: Finished difference Result 14040 states and 22617 transitions. [2021-11-21 00:27:19,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:27:19,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 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 212 [2021-11-21 00:27:19,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:27:20,036 INFO L225 Difference]: With dead ends: 14040 [2021-11-21 00:27:20,036 INFO L226 Difference]: Without dead ends: 8764 [2021-11-21 00:27:20,046 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 [2021-11-21 00:27:20,047 INFO L933 BasicCegarLoop]: 937 mSDtfsCounter, 191 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 1822 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:27:20,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 1822 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:27:20,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8764 states. [2021-11-21 00:27:20,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8764 to 8762. [2021-11-21 00:27:20,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8762 states, 8761 states have (on average 1.6084921812578472) internal successors, (14092), 8761 states have internal predecessors, (14092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:20,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8762 states to 8762 states and 14092 transitions. [2021-11-21 00:27:20,663 INFO L78 Accepts]: Start accepts. Automaton has 8762 states and 14092 transitions. Word has length 212 [2021-11-21 00:27:20,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:27:20,664 INFO L470 AbstractCegarLoop]: Abstraction has 8762 states and 14092 transitions. [2021-11-21 00:27:20,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:20,665 INFO L276 IsEmpty]: Start isEmpty. Operand 8762 states and 14092 transitions. [2021-11-21 00:27:20,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-21 00:27:20,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:27:20,669 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:27:20,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 00:27:20,670 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:27:20,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:27:20,670 INFO L85 PathProgramCache]: Analyzing trace with hash 329789359, now seen corresponding path program 1 times [2021-11-21 00:27:20,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:27:20,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333938197] [2021-11-21 00:27:20,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:27:20,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:27:20,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:27:20,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:27:20,782 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:27:20,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333938197] [2021-11-21 00:27:20,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333938197] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:27:20,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:27:20,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:27:20,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267987344] [2021-11-21 00:27:20,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:27:20,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:27:20,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:27:20,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:27:20,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:27:20,785 INFO L87 Difference]: Start difference. First operand 8762 states and 14092 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:22,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:27:22,060 INFO L93 Difference]: Finished difference Result 23400 states and 37665 transitions. [2021-11-21 00:27:22,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:27:22,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 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 216 [2021-11-21 00:27:22,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:27:22,104 INFO L225 Difference]: With dead ends: 23400 [2021-11-21 00:27:22,104 INFO L226 Difference]: Without dead ends: 15190 [2021-11-21 00:27:22,118 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 [2021-11-21 00:27:22,120 INFO L933 BasicCegarLoop]: 953 mSDtfsCounter, 185 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1845 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:27:22,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 1845 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:27:22,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15190 states. [2021-11-21 00:27:22,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15190 to 15188. [2021-11-21 00:27:23,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15188 states, 15187 states have (on average 1.6052544939751103) internal successors, (24379), 15187 states have internal predecessors, (24379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:23,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15188 states to 15188 states and 24379 transitions. [2021-11-21 00:27:23,060 INFO L78 Accepts]: Start accepts. Automaton has 15188 states and 24379 transitions. Word has length 216 [2021-11-21 00:27:23,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:27:23,061 INFO L470 AbstractCegarLoop]: Abstraction has 15188 states and 24379 transitions. [2021-11-21 00:27:23,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:23,062 INFO L276 IsEmpty]: Start isEmpty. Operand 15188 states and 24379 transitions. [2021-11-21 00:27:23,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-21 00:27:23,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:27:23,067 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:27:23,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 00:27:23,067 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:27:23,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:27:23,068 INFO L85 PathProgramCache]: Analyzing trace with hash -859099888, now seen corresponding path program 1 times [2021-11-21 00:27:23,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:27:23,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541746232] [2021-11-21 00:27:23,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:27:23,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:27:23,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:27:23,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:27:23,209 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:27:23,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541746232] [2021-11-21 00:27:23,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541746232] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:27:23,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:27:23,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:27:23,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636330613] [2021-11-21 00:27:23,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:27:23,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:27:23,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:27:23,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:27:23,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:27:23,212 INFO L87 Difference]: Start difference. First operand 15188 states and 24379 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:24,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:27:24,935 INFO L93 Difference]: Finished difference Result 38057 states and 61109 transitions. [2021-11-21 00:27:24,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:27:24,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 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 218 [2021-11-21 00:27:24,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:27:25,015 INFO L225 Difference]: With dead ends: 38057 [2021-11-21 00:27:25,015 INFO L226 Difference]: Without dead ends: 23421 [2021-11-21 00:27:25,046 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 [2021-11-21 00:27:25,047 INFO L933 BasicCegarLoop]: 938 mSDtfsCounter, 184 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1824 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:27:25,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 1824 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:27:25,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23421 states. [2021-11-21 00:27:26,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23421 to 23419. [2021-11-21 00:27:26,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23419 states, 23418 states have (on average 1.6028695874967973) internal successors, (37536), 23418 states have internal predecessors, (37536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:26,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23419 states to 23419 states and 37536 transitions. [2021-11-21 00:27:26,639 INFO L78 Accepts]: Start accepts. Automaton has 23419 states and 37536 transitions. Word has length 218 [2021-11-21 00:27:26,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:27:26,639 INFO L470 AbstractCegarLoop]: Abstraction has 23419 states and 37536 transitions. [2021-11-21 00:27:26,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:26,640 INFO L276 IsEmpty]: Start isEmpty. Operand 23419 states and 37536 transitions. [2021-11-21 00:27:26,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-21 00:27:26,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:27:26,645 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:27:26,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 00:27:26,645 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:27:26,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:27:26,646 INFO L85 PathProgramCache]: Analyzing trace with hash -926029843, now seen corresponding path program 1 times [2021-11-21 00:27:26,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:27:26,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731767220] [2021-11-21 00:27:26,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:27:26,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:27:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:27:26,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:27:26,797 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:27:26,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731767220] [2021-11-21 00:27:26,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731767220] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:27:26,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:27:26,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 00:27:26,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490277176] [2021-11-21 00:27:26,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:27:26,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:27:26,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:27:26,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:27:26,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:27:26,800 INFO L87 Difference]: Start difference. First operand 23419 states and 37536 transitions. Second operand has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:29,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:27:29,823 INFO L93 Difference]: Finished difference Result 57656 states and 92288 transitions. [2021-11-21 00:27:29,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 00:27:29,824 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 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 222 [2021-11-21 00:27:29,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:27:29,929 INFO L225 Difference]: With dead ends: 57656 [2021-11-21 00:27:29,930 INFO L226 Difference]: Without dead ends: 34812 [2021-11-21 00:27:29,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:27:29,983 INFO L933 BasicCegarLoop]: 945 mSDtfsCounter, 1999 mSDsluCounter, 8607 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1999 SdHoareTripleChecker+Valid, 9217 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:27:29,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1999 Valid, 9217 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 00:27:30,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34812 states. [2021-11-21 00:27:31,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34812 to 34794. [2021-11-21 00:27:31,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34794 states, 34793 states have (on average 1.5943436898226655) internal successors, (55472), 34793 states have internal predecessors, (55472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:31,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34794 states to 34794 states and 55472 transitions. [2021-11-21 00:27:31,710 INFO L78 Accepts]: Start accepts. Automaton has 34794 states and 55472 transitions. Word has length 222 [2021-11-21 00:27:31,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:27:31,711 INFO L470 AbstractCegarLoop]: Abstraction has 34794 states and 55472 transitions. [2021-11-21 00:27:31,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.714285714285715) internal successors, (222), 7 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:31,711 INFO L276 IsEmpty]: Start isEmpty. Operand 34794 states and 55472 transitions. [2021-11-21 00:27:31,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-21 00:27:31,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:27:31,715 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:27:31,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 00:27:31,716 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:27:31,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:27:31,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1286226212, now seen corresponding path program 1 times [2021-11-21 00:27:31,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:27:31,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657075074] [2021-11-21 00:27:31,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:27:31,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:27:31,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:27:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:27:31,841 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:27:31,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657075074] [2021-11-21 00:27:31,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657075074] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:27:31,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:27:31,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:27:31,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560596655] [2021-11-21 00:27:31,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:27:31,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:27:31,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:27:31,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:27:31,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:27:31,843 INFO L87 Difference]: Start difference. First operand 34794 states and 55472 transitions. Second operand has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:33,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:27:33,761 INFO L93 Difference]: Finished difference Result 69015 states and 110022 transitions. [2021-11-21 00:27:33,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:27:33,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 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 223 [2021-11-21 00:27:33,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:27:33,848 INFO L225 Difference]: With dead ends: 69015 [2021-11-21 00:27:33,848 INFO L226 Difference]: Without dead ends: 34796 [2021-11-21 00:27:33,889 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 [2021-11-21 00:27:33,889 INFO L933 BasicCegarLoop]: 928 mSDtfsCounter, 388 mSDsluCounter, 1943 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 2742 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:27:33,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 2742 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:27:33,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34796 states. [2021-11-21 00:27:35,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34796 to 34794. [2021-11-21 00:27:35,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34794 states, 34793 states have (on average 1.5915845141264047) internal successors, (55376), 34793 states have internal predecessors, (55376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:35,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34794 states to 34794 states and 55376 transitions. [2021-11-21 00:27:35,657 INFO L78 Accepts]: Start accepts. Automaton has 34794 states and 55376 transitions. Word has length 223 [2021-11-21 00:27:35,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:27:35,658 INFO L470 AbstractCegarLoop]: Abstraction has 34794 states and 55376 transitions. [2021-11-21 00:27:35,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:35,659 INFO L276 IsEmpty]: Start isEmpty. Operand 34794 states and 55376 transitions. [2021-11-21 00:27:35,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-21 00:27:35,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:27:35,663 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:27:35,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-21 00:27:35,663 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:27:35,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:27:35,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1151245204, now seen corresponding path program 1 times [2021-11-21 00:27:35,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:27:35,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486794589] [2021-11-21 00:27:35,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:27:35,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:27:35,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:27:35,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:27:35,775 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:27:35,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486794589] [2021-11-21 00:27:35,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486794589] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:27:35,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:27:35,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:27:35,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109464131] [2021-11-21 00:27:35,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:27:35,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:27:35,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:27:35,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:27:35,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:27:35,778 INFO L87 Difference]: Start difference. First operand 34794 states and 55376 transitions. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:37,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:27:37,657 INFO L93 Difference]: Finished difference Result 69015 states and 109830 transitions. [2021-11-21 00:27:37,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:27:37,658 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 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 224 [2021-11-21 00:27:37,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:27:37,732 INFO L225 Difference]: With dead ends: 69015 [2021-11-21 00:27:37,732 INFO L226 Difference]: Without dead ends: 34796 [2021-11-21 00:27:37,760 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 [2021-11-21 00:27:37,760 INFO L933 BasicCegarLoop]: 932 mSDtfsCounter, 396 mSDsluCounter, 1945 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 2748 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:27:37,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 2748 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:27:37,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34796 states. [2021-11-21 00:27:39,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34796 to 34794. [2021-11-21 00:27:39,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34794 states, 34793 states have (on average 1.588825338430144) internal successors, (55280), 34793 states have internal predecessors, (55280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:39,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34794 states to 34794 states and 55280 transitions. [2021-11-21 00:27:39,284 INFO L78 Accepts]: Start accepts. Automaton has 34794 states and 55280 transitions. Word has length 224 [2021-11-21 00:27:39,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:27:39,284 INFO L470 AbstractCegarLoop]: Abstraction has 34794 states and 55280 transitions. [2021-11-21 00:27:39,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:39,284 INFO L276 IsEmpty]: Start isEmpty. Operand 34794 states and 55280 transitions. [2021-11-21 00:27:39,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-21 00:27:39,287 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:27:39,288 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:27:39,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-21 00:27:39,288 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:27:39,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:27:39,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1266359275, now seen corresponding path program 1 times [2021-11-21 00:27:39,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:27:39,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784975822] [2021-11-21 00:27:39,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:27:39,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:27:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:27:39,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:27:39,399 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:27:39,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784975822] [2021-11-21 00:27:39,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784975822] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:27:39,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:27:39,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:27:39,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113596881] [2021-11-21 00:27:39,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:27:39,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:27:39,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:27:39,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:27:39,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:27:39,402 INFO L87 Difference]: Start difference. First operand 34794 states and 55280 transitions. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:41,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:27:41,348 INFO L93 Difference]: Finished difference Result 69015 states and 109638 transitions. [2021-11-21 00:27:41,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:27:41,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 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 225 [2021-11-21 00:27:41,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:27:41,397 INFO L225 Difference]: With dead ends: 69015 [2021-11-21 00:27:41,397 INFO L226 Difference]: Without dead ends: 34796 [2021-11-21 00:27:41,421 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 [2021-11-21 00:27:41,421 INFO L933 BasicCegarLoop]: 933 mSDtfsCounter, 394 mSDsluCounter, 1947 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 2751 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:27:41,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 2751 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:27:41,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34796 states. [2021-11-21 00:27:42,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34796 to 34794. [2021-11-21 00:27:42,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34794 states, 34793 states have (on average 1.5860661627338832) internal successors, (55184), 34793 states have internal predecessors, (55184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:42,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34794 states to 34794 states and 55184 transitions. [2021-11-21 00:27:42,964 INFO L78 Accepts]: Start accepts. Automaton has 34794 states and 55184 transitions. Word has length 225 [2021-11-21 00:27:42,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:27:42,965 INFO L470 AbstractCegarLoop]: Abstraction has 34794 states and 55184 transitions. [2021-11-21 00:27:42,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:42,965 INFO L276 IsEmpty]: Start isEmpty. Operand 34794 states and 55184 transitions. [2021-11-21 00:27:42,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-21 00:27:42,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:27:42,969 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:27:42,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 00:27:42,969 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:27:42,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:27:42,970 INFO L85 PathProgramCache]: Analyzing trace with hash 544486203, now seen corresponding path program 1 times [2021-11-21 00:27:42,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:27:42,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770436495] [2021-11-21 00:27:42,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:27:42,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:27:43,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:27:43,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:27:43,075 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:27:43,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770436495] [2021-11-21 00:27:43,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770436495] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:27:43,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:27:43,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:27:43,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597945095] [2021-11-21 00:27:43,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:27:43,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:27:43,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:27:43,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:27:43,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:27:43,077 INFO L87 Difference]: Start difference. First operand 34794 states and 55184 transitions. Second operand has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:45,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:27:45,100 INFO L93 Difference]: Finished difference Result 69015 states and 109446 transitions. [2021-11-21 00:27:45,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:27:45,101 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 states have internal predecessors, (226), 0 states have call successors, (0), 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 226 [2021-11-21 00:27:45,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:27:45,163 INFO L225 Difference]: With dead ends: 69015 [2021-11-21 00:27:45,164 INFO L226 Difference]: Without dead ends: 34796 [2021-11-21 00:27:45,190 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 [2021-11-21 00:27:45,191 INFO L933 BasicCegarLoop]: 934 mSDtfsCounter, 392 mSDsluCounter, 1949 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 2754 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:27:45,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 2754 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:27:45,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34796 states. [2021-11-21 00:27:46,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34796 to 34794. [2021-11-21 00:27:46,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34794 states, 34793 states have (on average 1.5833069870376224) internal successors, (55088), 34793 states have internal predecessors, (55088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:46,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34794 states to 34794 states and 55088 transitions. [2021-11-21 00:27:46,797 INFO L78 Accepts]: Start accepts. Automaton has 34794 states and 55088 transitions. Word has length 226 [2021-11-21 00:27:46,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:27:46,798 INFO L470 AbstractCegarLoop]: Abstraction has 34794 states and 55088 transitions. [2021-11-21 00:27:46,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:46,798 INFO L276 IsEmpty]: Start isEmpty. Operand 34794 states and 55088 transitions. [2021-11-21 00:27:46,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-11-21 00:27:46,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:27:46,802 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:27:46,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-21 00:27:46,802 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:27:46,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:27:46,803 INFO L85 PathProgramCache]: Analyzing trace with hash -354184526, now seen corresponding path program 1 times [2021-11-21 00:27:46,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:27:46,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471510076] [2021-11-21 00:27:46,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:27:46,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:27:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:27:46,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:27:46,909 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:27:46,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471510076] [2021-11-21 00:27:46,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471510076] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:27:46,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:27:46,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:27:46,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556467840] [2021-11-21 00:27:46,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:27:46,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:27:46,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:27:46,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:27:46,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:27:46,912 INFO L87 Difference]: Start difference. First operand 34794 states and 55088 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:49,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:27:49,048 INFO L93 Difference]: Finished difference Result 69015 states and 109254 transitions. [2021-11-21 00:27:49,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:27:49,049 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 227 [2021-11-21 00:27:49,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:27:49,107 INFO L225 Difference]: With dead ends: 69015 [2021-11-21 00:27:49,107 INFO L226 Difference]: Without dead ends: 34796 [2021-11-21 00:27:49,129 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 [2021-11-21 00:27:49,130 INFO L933 BasicCegarLoop]: 935 mSDtfsCounter, 390 mSDsluCounter, 1951 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 2757 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:27:49,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 2757 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:27:49,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34796 states. [2021-11-21 00:27:50,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34796 to 34794. [2021-11-21 00:27:50,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34794 states, 34793 states have (on average 1.5805478113413618) internal successors, (54992), 34793 states have internal predecessors, (54992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:50,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34794 states to 34794 states and 54992 transitions. [2021-11-21 00:27:50,831 INFO L78 Accepts]: Start accepts. Automaton has 34794 states and 54992 transitions. Word has length 227 [2021-11-21 00:27:50,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:27:50,832 INFO L470 AbstractCegarLoop]: Abstraction has 34794 states and 54992 transitions. [2021-11-21 00:27:50,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:50,833 INFO L276 IsEmpty]: Start isEmpty. Operand 34794 states and 54992 transitions. [2021-11-21 00:27:50,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-21 00:27:50,835 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:27:50,835 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:27:50,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-21 00:27:50,836 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:27:50,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:27:50,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1708759139, now seen corresponding path program 1 times [2021-11-21 00:27:50,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:27:50,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778075154] [2021-11-21 00:27:50,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:27:50,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:27:50,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:27:51,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:27:51,094 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:27:51,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778075154] [2021-11-21 00:27:51,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778075154] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:27:51,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:27:51,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 00:27:51,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717730918] [2021-11-21 00:27:51,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:27:51,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:27:51,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:27:51,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:27:51,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:27:51,097 INFO L87 Difference]: Start difference. First operand 34794 states and 54992 transitions. Second operand has 7 states, 7 states have (on average 32.714285714285715) internal successors, (229), 7 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:53,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:27:53,858 INFO L93 Difference]: Finished difference Result 69015 states and 109062 transitions. [2021-11-21 00:27:53,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:27:53,859 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 32.714285714285715) internal successors, (229), 7 states have internal predecessors, (229), 0 states have call successors, (0), 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 229 [2021-11-21 00:27:53,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:27:53,911 INFO L225 Difference]: With dead ends: 69015 [2021-11-21 00:27:53,911 INFO L226 Difference]: Without dead ends: 34796 [2021-11-21 00:27:53,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:27:53,934 INFO L933 BasicCegarLoop]: 927 mSDtfsCounter, 718 mSDsluCounter, 3836 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 4519 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:27:53,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 4519 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 00:27:53,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34796 states. [2021-11-21 00:27:55,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34796 to 34794. [2021-11-21 00:27:55,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34794 states, 34793 states have (on average 1.5796280861092749) internal successors, (54960), 34793 states have internal predecessors, (54960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:55,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34794 states to 34794 states and 54960 transitions. [2021-11-21 00:27:55,672 INFO L78 Accepts]: Start accepts. Automaton has 34794 states and 54960 transitions. Word has length 229 [2021-11-21 00:27:55,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:27:55,673 INFO L470 AbstractCegarLoop]: Abstraction has 34794 states and 54960 transitions. [2021-11-21 00:27:55,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 32.714285714285715) internal successors, (229), 7 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:55,673 INFO L276 IsEmpty]: Start isEmpty. Operand 34794 states and 54960 transitions. [2021-11-21 00:27:55,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-21 00:27:55,675 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:27:55,676 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:27:55,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-21 00:27:55,676 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:27:55,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:27:55,677 INFO L85 PathProgramCache]: Analyzing trace with hash -356927027, now seen corresponding path program 1 times [2021-11-21 00:27:55,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:27:55,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628147327] [2021-11-21 00:27:55,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:27:55,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:27:55,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:27:55,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:27:55,910 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:27:55,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628147327] [2021-11-21 00:27:55,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628147327] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:27:55,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:27:55,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 00:27:55,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399352136] [2021-11-21 00:27:55,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:27:55,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:27:55,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:27:55,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:27:55,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:27:55,912 INFO L87 Difference]: Start difference. First operand 34794 states and 54960 transitions. Second operand has 7 states, 7 states have (on average 33.142857142857146) internal successors, (232), 7 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:27:59,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:27:59,450 INFO L93 Difference]: Finished difference Result 85544 states and 134771 transitions. [2021-11-21 00:27:59,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:27:59,450 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 33.142857142857146) internal successors, (232), 7 states have internal predecessors, (232), 0 states have call successors, (0), 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 232 [2021-11-21 00:27:59,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:27:59,531 INFO L225 Difference]: With dead ends: 85544 [2021-11-21 00:27:59,531 INFO L226 Difference]: Without dead ends: 51325 [2021-11-21 00:27:59,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:27:59,554 INFO L933 BasicCegarLoop]: 932 mSDtfsCounter, 707 mSDsluCounter, 3868 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 4560 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:27:59,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [707 Valid, 4560 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:27:59,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51325 states.