./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace94cb5-e9aa-4073-b978-7bd1514b38d6/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace94cb5-e9aa-4073-b978-7bd1514b38d6/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace94cb5-e9aa-4073-b978-7bd1514b38d6/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace94cb5-e9aa-4073-b978-7bd1514b38d6/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace94cb5-e9aa-4073-b978-7bd1514b38d6/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace94cb5-e9aa-4073-b978-7bd1514b38d6/bin/utaipan-UbGMyvGFUs --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 e2c31a6d36722edb2a8cb670626aeeca5f235139fff7eadbabd05db5fa398d5d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:55:39,020 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:55:39,023 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:55:39,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:55:39,090 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:55:39,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:55:39,098 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:55:39,104 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:55:39,107 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:55:39,115 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:55:39,117 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:55:39,118 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:55:39,119 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:55:39,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:55:39,126 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:55:39,132 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:55:39,136 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:55:39,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:55:39,140 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:55:39,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:55:39,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:55:39,153 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:55:39,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:55:39,159 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:55:39,166 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:55:39,167 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:55:39,167 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:55:39,170 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:55:39,170 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:55:39,172 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:55:39,173 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:55:39,174 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:55:39,176 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:55:39,177 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:55:39,180 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:55:39,180 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:55:39,181 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:55:39,182 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:55:39,182 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:55:39,183 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:55:39,184 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:55:39,185 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace94cb5-e9aa-4073-b978-7bd1514b38d6/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:55:39,239 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:55:39,240 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:55:39,241 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:55:39,242 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:55:39,242 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:55:39,242 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:55:39,243 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:55:39,243 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:55:39,243 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:55:39,243 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:55:39,245 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:55:39,245 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:55:39,245 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:55:39,246 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:55:39,246 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:55:39,246 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:55:39,247 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:55:39,247 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:55:39,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:55:39,248 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:55:39,248 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:55:39,248 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:55:39,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:55:39,249 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:55:39,249 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:55:39,249 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:55:39,249 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:55:39,250 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:55:39,250 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:55:39,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:55:39,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:55:39,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:55:39,253 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:55:39,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:55:39,253 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:55:39,253 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:55:39,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:55:39,254 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:55:39,254 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:55:39,254 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:55:39,255 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_ace94cb5-e9aa-4073-b978-7bd1514b38d6/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace94cb5-e9aa-4073-b978-7bd1514b38d6/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e2c31a6d36722edb2a8cb670626aeeca5f235139fff7eadbabd05db5fa398d5d [2021-11-19 14:55:39,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:55:39,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:55:39,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:55:39,605 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:55:39,606 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:55:39,607 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace94cb5-e9aa-4073-b978-7bd1514b38d6/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-11-19 14:55:39,753 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace94cb5-e9aa-4073-b978-7bd1514b38d6/bin/utaipan-UbGMyvGFUs/data/f43d7eaa4/83fb015133174c90987039b7a1c9ec30/FLAGcf3de048f [2021-11-19 14:55:40,399 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:55:40,399 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace94cb5-e9aa-4073-b978-7bd1514b38d6/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-11-19 14:55:40,418 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace94cb5-e9aa-4073-b978-7bd1514b38d6/bin/utaipan-UbGMyvGFUs/data/f43d7eaa4/83fb015133174c90987039b7a1c9ec30/FLAGcf3de048f [2021-11-19 14:55:40,618 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace94cb5-e9aa-4073-b978-7bd1514b38d6/bin/utaipan-UbGMyvGFUs/data/f43d7eaa4/83fb015133174c90987039b7a1c9ec30 [2021-11-19 14:55:40,621 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:55:40,623 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:55:40,624 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:55:40,625 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:55:40,628 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:55:40,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:55:40" (1/1) ... [2021-11-19 14:55:40,631 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14141715 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:55:40, skipping insertion in model container [2021-11-19 14:55:40,631 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:55:40" (1/1) ... [2021-11-19 14:55:40,641 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:55:40,727 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:55:41,114 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_ace94cb5-e9aa-4073-b978-7bd1514b38d6/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[14519,14532] [2021-11-19 14:55:41,239 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:55:41,251 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:55:41,374 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_ace94cb5-e9aa-4073-b978-7bd1514b38d6/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[14519,14532] [2021-11-19 14:55:41,445 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:55:41,471 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:55:41,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:55:41 WrapperNode [2021-11-19 14:55:41,472 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:55:41,473 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:55:41,473 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:55:41,473 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:55:41,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:55:41" (1/1) ... [2021-11-19 14:55:41,512 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:55:41" (1/1) ... [2021-11-19 14:55:41,588 INFO L137 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1183 [2021-11-19 14:55:41,588 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:55:41,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:55:41,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:55:41,591 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:55:41,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:55:41" (1/1) ... [2021-11-19 14:55:41,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:55:41" (1/1) ... [2021-11-19 14:55:41,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:55:41" (1/1) ... [2021-11-19 14:55:41,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:55:41" (1/1) ... [2021-11-19 14:55:41,625 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:55:41" (1/1) ... [2021-11-19 14:55:41,650 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:55:41" (1/1) ... [2021-11-19 14:55:41,658 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:55:41" (1/1) ... [2021-11-19 14:55:41,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:55:41,674 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:55:41,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:55:41,680 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:55:41,681 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:55:41" (1/1) ... [2021-11-19 14:55:41,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:55:41,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace94cb5-e9aa-4073-b978-7bd1514b38d6/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:55:41,728 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace94cb5-e9aa-4073-b978-7bd1514b38d6/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:55:41,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ace94cb5-e9aa-4073-b978-7bd1514b38d6/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:55:41,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:55:41,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 14:55:41,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:55:41,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:55:41,987 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:55:42,003 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:55:43,042 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:55:43,331 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:55:43,332 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 14:55:43,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:55:43 BoogieIcfgContainer [2021-11-19 14:55:43,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:55:43,337 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:55:43,338 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:55:43,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:55:43,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:55:40" (1/3) ... [2021-11-19 14:55:43,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548ab56f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:55:43, skipping insertion in model container [2021-11-19 14:55:43,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:55:41" (2/3) ... [2021-11-19 14:55:43,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548ab56f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:55:43, skipping insertion in model container [2021-11-19 14:55:43,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:55:43" (3/3) ... [2021-11-19 14:55:43,345 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-11-19 14:55:43,351 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:55:43,351 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:55:43,408 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:55:43,415 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 [2021-11-19 14:55:43,415 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:55:43,441 INFO L276 IsEmpty]: Start isEmpty. Operand has 226 states, 224 states have (on average 1.7633928571428572) internal successors, (395), 225 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:55:43,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 14:55:43,466 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:55:43,467 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] [2021-11-19 14:55:43,468 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:55:43,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:55:43,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1074157564, now seen corresponding path program 1 times [2021-11-19 14:55:43,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:55:43,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287754533] [2021-11-19 14:55:43,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:55:43,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:55:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:55:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:55:44,499 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:55:44,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287754533] [2021-11-19 14:55:44,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287754533] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:55:44,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:55:44,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:55:44,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261892981] [2021-11-19 14:55:44,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:55:44,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:55:44,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:55:44,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:55:44,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:55:44,547 INFO L87 Difference]: Start difference. First operand has 226 states, 224 states have (on average 1.7633928571428572) internal successors, (395), 225 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:55:44,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:55:44,868 INFO L93 Difference]: Finished difference Result 563 states and 976 transitions. [2021-11-19 14:55:44,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:55:44,871 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 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 113 [2021-11-19 14:55:44,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:55:44,901 INFO L225 Difference]: With dead ends: 563 [2021-11-19 14:55:44,901 INFO L226 Difference]: Without dead ends: 399 [2021-11-19 14:55:44,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:55:44,915 INFO L933 BasicCegarLoop]: 436 mSDtfsCounter, 1250 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1250 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:55:44,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1250 Valid, 810 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:55:44,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-11-19 14:55:45,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 397. [2021-11-19 14:55:45,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 1.3484848484848484) internal successors, (534), 396 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:55:45,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 534 transitions. [2021-11-19 14:55:45,068 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 534 transitions. Word has length 113 [2021-11-19 14:55:45,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:55:45,069 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 534 transitions. [2021-11-19 14:55:45,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:55:45,069 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 534 transitions. [2021-11-19 14:55:45,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-19 14:55:45,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:55:45,076 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:55:45,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 14:55:45,076 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:55:45,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:55:45,078 INFO L85 PathProgramCache]: Analyzing trace with hash -602126619, now seen corresponding path program 1 times [2021-11-19 14:55:45,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:55:45,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017752574] [2021-11-19 14:55:45,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:55:45,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:55:45,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:55:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:55:45,238 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:55:45,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017752574] [2021-11-19 14:55:45,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017752574] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:55:45,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:55:45,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:55:45,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96453967] [2021-11-19 14:55:45,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:55:45,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:55:45,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:55:45,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:55:45,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:55:45,242 INFO L87 Difference]: Start difference. First operand 397 states and 534 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:55:45,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:55:45,369 INFO L93 Difference]: Finished difference Result 667 states and 907 transitions. [2021-11-19 14:55:45,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:55:45,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-19 14:55:45,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:55:45,375 INFO L225 Difference]: With dead ends: 667 [2021-11-19 14:55:45,376 INFO L226 Difference]: Without dead ends: 549 [2021-11-19 14:55:45,384 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 [2021-11-19 14:55:45,386 INFO L933 BasicCegarLoop]: 379 mSDtfsCounter, 215 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:55:45,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 635 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:55:45,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-19 14:55:45,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 547. [2021-11-19 14:55:45,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 1.3424908424908424) internal successors, (733), 546 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:55:45,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 733 transitions. [2021-11-19 14:55:45,432 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 733 transitions. Word has length 119 [2021-11-19 14:55:45,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:55:45,433 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 733 transitions. [2021-11-19 14:55:45,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:55:45,433 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 733 transitions. [2021-11-19 14:55:45,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-19 14:55:45,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:55:45,437 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:55:45,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 14:55:45,437 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:55:45,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:55:45,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1200217551, now seen corresponding path program 1 times [2021-11-19 14:55:45,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:55:45,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396076997] [2021-11-19 14:55:45,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:55:45,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:55:45,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:55:45,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:55:45,666 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:55:45,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396076997] [2021-11-19 14:55:45,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396076997] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:55:45,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:55:45,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 14:55:45,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912272105] [2021-11-19 14:55:45,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:55:45,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:55:45,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:55:45,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:55:45,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:55:45,672 INFO L87 Difference]: Start difference. First operand 547 states and 733 transitions. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:55:46,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:55:46,388 INFO L93 Difference]: Finished difference Result 1926 states and 2586 transitions. [2021-11-19 14:55:46,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:55:46,389 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-19 14:55:46,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:55:46,400 INFO L225 Difference]: With dead ends: 1926 [2021-11-19 14:55:46,400 INFO L226 Difference]: Without dead ends: 1417 [2021-11-19 14:55:46,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:55:46,411 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 1859 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1859 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:55:46,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1859 Valid, 656 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:55:46,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2021-11-19 14:55:46,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 1413. [2021-11-19 14:55:46,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 1.3059490084985836) internal successors, (1844), 1412 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:55:46,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 1844 transitions. [2021-11-19 14:55:46,535 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 1844 transitions. Word has length 119 [2021-11-19 14:55:46,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:55:46,537 INFO L470 AbstractCegarLoop]: Abstraction has 1413 states and 1844 transitions. [2021-11-19 14:55:46,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:55:46,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 1844 transitions. [2021-11-19 14:55:46,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-19 14:55:46,542 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:55:46,542 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:55:46,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 14:55:46,543 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:55:46,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:55:46,543 INFO L85 PathProgramCache]: Analyzing trace with hash 624092884, now seen corresponding path program 1 times [2021-11-19 14:55:46,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:55:46,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718591029] [2021-11-19 14:55:46,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:55:46,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:55:46,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:55:46,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:55:46,928 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:55:46,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718591029] [2021-11-19 14:55:46,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718591029] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:55:46,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:55:46,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:55:46,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653413483] [2021-11-19 14:55:46,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:55:46,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:55:46,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:55:46,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:55:46,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:55:46,933 INFO L87 Difference]: Start difference. First operand 1413 states and 1844 transitions. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:55:47,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:55:47,202 INFO L93 Difference]: Finished difference Result 1915 states and 2536 transitions. [2021-11-19 14:55:47,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:55:47,203 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-19 14:55:47,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:55:47,212 INFO L225 Difference]: With dead ends: 1915 [2021-11-19 14:55:47,212 INFO L226 Difference]: Without dead ends: 1291 [2021-11-19 14:55:47,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:55:47,221 INFO L933 BasicCegarLoop]: 274 mSDtfsCounter, 898 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 898 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:55:47,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [898 Valid, 532 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:55:47,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2021-11-19 14:55:47,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 1284. [2021-11-19 14:55:47,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 1283 states have (on average 1.308651597817615) internal successors, (1679), 1283 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:55:47,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 1679 transitions. [2021-11-19 14:55:47,365 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 1679 transitions. Word has length 119 [2021-11-19 14:55:47,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:55:47,366 INFO L470 AbstractCegarLoop]: Abstraction has 1284 states and 1679 transitions. [2021-11-19 14:55:47,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:55:47,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 1679 transitions. [2021-11-19 14:55:47,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-19 14:55:47,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:55:47,370 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:55:47,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 14:55:47,370 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:55:47,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:55:47,372 INFO L85 PathProgramCache]: Analyzing trace with hash -387901295, now seen corresponding path program 1 times [2021-11-19 14:55:47,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:55:47,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707020306] [2021-11-19 14:55:47,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:55:47,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:55:47,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:55:47,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:55:47,591 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:55:47,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707020306] [2021-11-19 14:55:47,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707020306] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:55:47,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:55:47,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 14:55:47,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422499775] [2021-11-19 14:55:47,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:55:47,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:55:47,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:55:47,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:55:47,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:55:47,595 INFO L87 Difference]: Start difference. First operand 1284 states and 1679 transitions. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:55:48,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:55:48,416 INFO L93 Difference]: Finished difference Result 4700 states and 6146 transitions. [2021-11-19 14:55:48,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:55:48,416 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-19 14:55:48,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:55:48,437 INFO L225 Difference]: With dead ends: 4700 [2021-11-19 14:55:48,438 INFO L226 Difference]: Without dead ends: 3530 [2021-11-19 14:55:48,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:55:48,442 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 2637 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2637 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:55:48,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2637 Valid, 574 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:55:48,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3530 states. [2021-11-19 14:55:48,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3530 to 3526. [2021-11-19 14:55:48,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3526 states, 3525 states have (on average 1.2678014184397164) internal successors, (4469), 3525 states have internal predecessors, (4469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:55:48,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3526 states to 3526 states and 4469 transitions. [2021-11-19 14:55:48,818 INFO L78 Accepts]: Start accepts. Automaton has 3526 states and 4469 transitions. Word has length 119 [2021-11-19 14:55:48,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:55:48,819 INFO L470 AbstractCegarLoop]: Abstraction has 3526 states and 4469 transitions. [2021-11-19 14:55:48,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:55:48,820 INFO L276 IsEmpty]: Start isEmpty. Operand 3526 states and 4469 transitions. [2021-11-19 14:55:48,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-19 14:55:48,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:55:48,832 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:55:48,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 14:55:48,833 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:55:48,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:55:48,834 INFO L85 PathProgramCache]: Analyzing trace with hash -2095638164, now seen corresponding path program 1 times [2021-11-19 14:55:48,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:55:48,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256919565] [2021-11-19 14:55:48,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:55:48,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:55:48,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:55:49,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:55:49,134 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:55:49,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256919565] [2021-11-19 14:55:49,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256919565] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:55:49,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:55:49,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:55:49,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758653262] [2021-11-19 14:55:49,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:55:49,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:55:49,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:55:49,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:55:49,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:55:49,137 INFO L87 Difference]: Start difference. First operand 3526 states and 4469 transitions. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:55:49,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:55:49,555 INFO L93 Difference]: Finished difference Result 5745 states and 7454 transitions. [2021-11-19 14:55:49,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:55:49,556 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-19 14:55:49,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:55:49,577 INFO L225 Difference]: With dead ends: 5745 [2021-11-19 14:55:49,577 INFO L226 Difference]: Without dead ends: 3592 [2021-11-19 14:55:49,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:55:49,581 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 713 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:55:49,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [713 Valid, 512 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:55:49,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3592 states. [2021-11-19 14:55:49,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3592 to 3590. [2021-11-19 14:55:49,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3590 states, 3589 states have (on average 1.2663694622457509) internal successors, (4545), 3589 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:55:49,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3590 states to 3590 states and 4545 transitions. [2021-11-19 14:55:49,952 INFO L78 Accepts]: Start accepts. Automaton has 3590 states and 4545 transitions. Word has length 119 [2021-11-19 14:55:49,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:55:49,952 INFO L470 AbstractCegarLoop]: Abstraction has 3590 states and 4545 transitions. [2021-11-19 14:55:49,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:55:49,953 INFO L276 IsEmpty]: Start isEmpty. Operand 3590 states and 4545 transitions. [2021-11-19 14:55:49,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 14:55:49,959 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:55:49,959 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:55:49,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 14:55:49,960 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:55:49,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:55:49,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1753000518, now seen corresponding path program 1 times [2021-11-19 14:55:49,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:55:49,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662351147] [2021-11-19 14:55:49,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:55:49,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:55:50,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:55:50,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:55:50,061 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:55:50,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662351147] [2021-11-19 14:55:50,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662351147] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:55:50,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:55:50,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:55:50,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679075674] [2021-11-19 14:55:50,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:55:50,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:55:50,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:55:50,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:55:50,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:55:50,064 INFO L87 Difference]: Start difference. First operand 3590 states and 4545 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:55:50,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:55:50,650 INFO L93 Difference]: Finished difference Result 6824 states and 8680 transitions. [2021-11-19 14:55:50,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:55:50,651 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-11-19 14:55:50,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:55:50,672 INFO L225 Difference]: With dead ends: 6824 [2021-11-19 14:55:50,673 INFO L226 Difference]: Without dead ends: 3590 [2021-11-19 14:55:50,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:55:50,681 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 770 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:55:50,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [770 Valid, 223 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:55:50,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3590 states. [2021-11-19 14:55:51,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3590 to 3590. [2021-11-19 14:55:51,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3590 states, 3589 states have (on average 1.2490944552800223) internal successors, (4483), 3589 states have internal predecessors, (4483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:55:51,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3590 states to 3590 states and 4483 transitions. [2021-11-19 14:55:51,123 INFO L78 Accepts]: Start accepts. Automaton has 3590 states and 4483 transitions. Word has length 125 [2021-11-19 14:55:51,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:55:51,123 INFO L470 AbstractCegarLoop]: Abstraction has 3590 states and 4483 transitions. [2021-11-19 14:55:51,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:55:51,124 INFO L276 IsEmpty]: Start isEmpty. Operand 3590 states and 4483 transitions. [2021-11-19 14:55:51,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 14:55:51,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:55:51,130 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:55:51,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 14:55:51,130 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:55:51,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:55:51,132 INFO L85 PathProgramCache]: Analyzing trace with hash -57275462, now seen corresponding path program 1 times [2021-11-19 14:55:51,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:55:51,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498605217] [2021-11-19 14:55:51,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:55:51,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:55:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:55:51,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:55:51,470 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:55:51,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498605217] [2021-11-19 14:55:51,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498605217] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:55:51,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:55:51,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:55:51,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407591179] [2021-11-19 14:55:51,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:55:51,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:55:51,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:55:51,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:55:51,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:55:51,473 INFO L87 Difference]: Start difference. First operand 3590 states and 4483 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:55:51,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:55:51,993 INFO L93 Difference]: Finished difference Result 5231 states and 6664 transitions. [2021-11-19 14:55:51,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:55:51,993 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-11-19 14:55:51,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:55:52,014 INFO L225 Difference]: With dead ends: 5231 [2021-11-19 14:55:52,015 INFO L226 Difference]: Without dead ends: 3637 [2021-11-19 14:55:52,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:55:52,019 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 646 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:55:52,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [646 Valid, 523 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:55:52,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3637 states. [2021-11-19 14:55:52,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3637 to 3635. [2021-11-19 14:55:52,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3635 states, 3634 states have (on average 1.2443588332416071) internal successors, (4522), 3634 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:55:52,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3635 states to 3635 states and 4522 transitions. [2021-11-19 14:55:52,396 INFO L78 Accepts]: Start accepts. Automaton has 3635 states and 4522 transitions. Word has length 125 [2021-11-19 14:55:52,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:55:52,396 INFO L470 AbstractCegarLoop]: Abstraction has 3635 states and 4522 transitions. [2021-11-19 14:55:52,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:55:52,397 INFO L276 IsEmpty]: Start isEmpty. Operand 3635 states and 4522 transitions. [2021-11-19 14:55:52,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 14:55:52,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:55:52,403 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:55:52,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 14:55:52,404 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:55:52,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:55:52,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1707175446, now seen corresponding path program 1 times [2021-11-19 14:55:52,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:55:52,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423932411] [2021-11-19 14:55:52,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:55:52,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:55:52,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:56:22,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:56:22,905 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:56:22,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423932411] [2021-11-19 14:56:22,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423932411] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:56:22,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:56:22,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-11-19 14:56:22,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875471199] [2021-11-19 14:56:22,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:56:22,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-19 14:56:22,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:56:22,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-19 14:56:22,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1686, Unknown=0, NotChecked=0, Total=1892 [2021-11-19 14:56:22,909 INFO L87 Difference]: Start difference. First operand 3635 states and 4522 transitions. Second operand has 44 states, 44 states have (on average 2.977272727272727) internal successors, (131), 43 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:04,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:57:04,334 INFO L93 Difference]: Finished difference Result 6650 states and 8578 transitions. [2021-11-19 14:57:04,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-19 14:57:04,335 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.977272727272727) internal successors, (131), 43 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-19 14:57:04,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:57:04,368 INFO L225 Difference]: With dead ends: 6650 [2021-11-19 14:57:04,368 INFO L226 Difference]: Without dead ends: 5477 [2021-11-19 14:57:04,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 40.3s TimeCoverageRelationStatistics Valid=1021, Invalid=5141, Unknown=0, NotChecked=0, Total=6162 [2021-11-19 14:57:04,375 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 1853 mSDsluCounter, 6018 mSDsCounter, 0 mSdLazyCounter, 4970 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1853 SdHoareTripleChecker+Valid, 6268 SdHoareTripleChecker+Invalid, 5034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 4970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:04,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1853 Valid, 6268 Invalid, 5034 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [64 Valid, 4970 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2021-11-19 14:57:04,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5477 states. [2021-11-19 14:57:04,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5477 to 4668. [2021-11-19 14:57:04,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4668 states, 4667 states have (on average 1.2622669809299336) internal successors, (5891), 4667 states have internal predecessors, (5891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:04,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4668 states to 4668 states and 5891 transitions. [2021-11-19 14:57:04,863 INFO L78 Accepts]: Start accepts. Automaton has 4668 states and 5891 transitions. Word has length 131 [2021-11-19 14:57:04,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:57:04,863 INFO L470 AbstractCegarLoop]: Abstraction has 4668 states and 5891 transitions. [2021-11-19 14:57:04,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.977272727272727) internal successors, (131), 43 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:04,864 INFO L276 IsEmpty]: Start isEmpty. Operand 4668 states and 5891 transitions. [2021-11-19 14:57:04,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 14:57:04,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:04,871 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:04,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 14:57:04,872 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:57:04,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:04,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1463124964, now seen corresponding path program 1 times [2021-11-19 14:57:04,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:57:04,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616099748] [2021-11-19 14:57:04,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:04,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:57:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:05,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:05,160 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:57:05,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616099748] [2021-11-19 14:57:05,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616099748] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:57:05,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:57:05,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:57:05,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964860075] [2021-11-19 14:57:05,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:57:05,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:57:05,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:57:05,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:57:05,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:57:05,163 INFO L87 Difference]: Start difference. First operand 4668 states and 5891 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:05,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:57:05,796 INFO L93 Difference]: Finished difference Result 5897 states and 7553 transitions. [2021-11-19 14:57:05,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:57:05,796 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-19 14:57:05,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:57:05,842 INFO L225 Difference]: With dead ends: 5897 [2021-11-19 14:57:05,842 INFO L226 Difference]: Without dead ends: 4574 [2021-11-19 14:57:05,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:57:05,848 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 1113 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:05,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1113 Valid, 505 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:57:05,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4574 states. [2021-11-19 14:57:06,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4574 to 4138. [2021-11-19 14:57:06,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4138 states, 4137 states have (on average 1.2608170171621949) internal successors, (5216), 4137 states have internal predecessors, (5216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:06,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4138 states to 4138 states and 5216 transitions. [2021-11-19 14:57:06,380 INFO L78 Accepts]: Start accepts. Automaton has 4138 states and 5216 transitions. Word has length 131 [2021-11-19 14:57:06,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:57:06,381 INFO L470 AbstractCegarLoop]: Abstraction has 4138 states and 5216 transitions. [2021-11-19 14:57:06,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:06,381 INFO L276 IsEmpty]: Start isEmpty. Operand 4138 states and 5216 transitions. [2021-11-19 14:57:06,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 14:57:06,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:06,388 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:06,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 14:57:06,389 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:57:06,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:06,389 INFO L85 PathProgramCache]: Analyzing trace with hash -2018168226, now seen corresponding path program 1 times [2021-11-19 14:57:06,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:57:06,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575259228] [2021-11-19 14:57:06,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:06,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:57:06,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:06,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:06,476 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:57:06,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575259228] [2021-11-19 14:57:06,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575259228] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:57:06,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:57:06,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:57:06,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590124615] [2021-11-19 14:57:06,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:57:06,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:57:06,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:57:06,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:57:06,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:57:06,480 INFO L87 Difference]: Start difference. First operand 4138 states and 5216 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:07,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:57:07,074 INFO L93 Difference]: Finished difference Result 4924 states and 6246 transitions. [2021-11-19 14:57:07,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:57:07,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-19 14:57:07,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:57:07,083 INFO L225 Difference]: With dead ends: 4924 [2021-11-19 14:57:07,083 INFO L226 Difference]: Without dead ends: 4140 [2021-11-19 14:57:07,086 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 [2021-11-19 14:57:07,087 INFO L933 BasicCegarLoop]: 363 mSDtfsCounter, 174 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:07,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 601 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:57:07,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4140 states. [2021-11-19 14:57:07,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4140 to 4138. [2021-11-19 14:57:07,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4138 states, 4137 states have (on average 1.249939569736524) internal successors, (5171), 4137 states have internal predecessors, (5171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:07,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4138 states to 4138 states and 5171 transitions. [2021-11-19 14:57:07,559 INFO L78 Accepts]: Start accepts. Automaton has 4138 states and 5171 transitions. Word has length 131 [2021-11-19 14:57:07,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:57:07,559 INFO L470 AbstractCegarLoop]: Abstraction has 4138 states and 5171 transitions. [2021-11-19 14:57:07,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:07,560 INFO L276 IsEmpty]: Start isEmpty. Operand 4138 states and 5171 transitions. [2021-11-19 14:57:07,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 14:57:07,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:07,567 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:07,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 14:57:07,567 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:57:07,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:07,568 INFO L85 PathProgramCache]: Analyzing trace with hash 791873488, now seen corresponding path program 1 times [2021-11-19 14:57:07,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:57:07,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981635841] [2021-11-19 14:57:07,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:07,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:57:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:07,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:07,793 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:57:07,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981635841] [2021-11-19 14:57:07,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981635841] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:57:07,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:57:07,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:57:07,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753560104] [2021-11-19 14:57:07,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:57:07,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:57:07,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:57:07,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:57:07,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:57:07,795 INFO L87 Difference]: Start difference. First operand 4138 states and 5171 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:08,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:57:08,342 INFO L93 Difference]: Finished difference Result 4842 states and 6080 transitions. [2021-11-19 14:57:08,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:57:08,343 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-19 14:57:08,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:57:08,350 INFO L225 Difference]: With dead ends: 4842 [2021-11-19 14:57:08,351 INFO L226 Difference]: Without dead ends: 3587 [2021-11-19 14:57:08,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:57:08,355 INFO L933 BasicCegarLoop]: 370 mSDtfsCounter, 599 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:08,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [599 Valid, 604 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:57:08,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3587 states. [2021-11-19 14:57:08,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3587 to 3585. [2021-11-19 14:57:08,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3585 states, 3584 states have (on average 1.2393973214285714) internal successors, (4442), 3584 states have internal predecessors, (4442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:08,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3585 states to 3585 states and 4442 transitions. [2021-11-19 14:57:08,719 INFO L78 Accepts]: Start accepts. Automaton has 3585 states and 4442 transitions. Word has length 131 [2021-11-19 14:57:08,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:57:08,719 INFO L470 AbstractCegarLoop]: Abstraction has 3585 states and 4442 transitions. [2021-11-19 14:57:08,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:08,720 INFO L276 IsEmpty]: Start isEmpty. Operand 3585 states and 4442 transitions. [2021-11-19 14:57:08,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 14:57:08,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:08,725 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:08,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-19 14:57:08,726 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:57:08,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:08,726 INFO L85 PathProgramCache]: Analyzing trace with hash 96391930, now seen corresponding path program 1 times [2021-11-19 14:57:08,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:57:08,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798063867] [2021-11-19 14:57:08,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:08,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:57:08,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:24,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:24,246 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:57:24,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798063867] [2021-11-19 14:57:24,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798063867] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:57:24,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:57:24,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-11-19 14:57:24,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388240526] [2021-11-19 14:57:24,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:57:24,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-19 14:57:24,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:57:24,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-19 14:57:24,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=1568, Unknown=0, NotChecked=0, Total=1892 [2021-11-19 14:57:24,249 INFO L87 Difference]: Start difference. First operand 3585 states and 4442 transitions. Second operand has 44 states, 44 states have (on average 2.977272727272727) internal successors, (131), 43 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:42,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:57:42,724 INFO L93 Difference]: Finished difference Result 5132 states and 6386 transitions. [2021-11-19 14:57:42,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-19 14:57:42,725 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.977272727272727) internal successors, (131), 43 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-19 14:57:42,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:57:42,733 INFO L225 Difference]: With dead ends: 5132 [2021-11-19 14:57:42,733 INFO L226 Difference]: Without dead ends: 4119 [2021-11-19 14:57:42,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1505 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=1084, Invalid=4922, Unknown=0, NotChecked=0, Total=6006 [2021-11-19 14:57:42,737 INFO L933 BasicCegarLoop]: 329 mSDtfsCounter, 1507 mSDsluCounter, 3942 mSDsCounter, 0 mSdLazyCounter, 3048 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 4226 SdHoareTripleChecker+Invalid, 3103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 3048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:42,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1507 Valid, 4226 Invalid, 3103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 3048 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-11-19 14:57:42,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4119 states. [2021-11-19 14:57:43,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4119 to 3691. [2021-11-19 14:57:43,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3691 states, 3690 states have (on average 1.2349593495934958) internal successors, (4557), 3690 states have internal predecessors, (4557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:43,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3691 states to 3691 states and 4557 transitions. [2021-11-19 14:57:43,187 INFO L78 Accepts]: Start accepts. Automaton has 3691 states and 4557 transitions. Word has length 131 [2021-11-19 14:57:43,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:57:43,187 INFO L470 AbstractCegarLoop]: Abstraction has 3691 states and 4557 transitions. [2021-11-19 14:57:43,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.977272727272727) internal successors, (131), 43 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:43,188 INFO L276 IsEmpty]: Start isEmpty. Operand 3691 states and 4557 transitions. [2021-11-19 14:57:43,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-19 14:57:43,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:43,194 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:43,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-19 14:57:43,194 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:57:43,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:43,195 INFO L85 PathProgramCache]: Analyzing trace with hash 2110026530, now seen corresponding path program 1 times [2021-11-19 14:57:43,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:57:43,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948524155] [2021-11-19 14:57:43,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:43,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:57:43,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:43,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:43,239 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:57:43,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948524155] [2021-11-19 14:57:43,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948524155] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:57:43,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:57:43,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:57:43,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81197096] [2021-11-19 14:57:43,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:57:43,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:57:43,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:57:43,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:57:43,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:57:43,241 INFO L87 Difference]: Start difference. First operand 3691 states and 4557 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:43,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:57:43,981 INFO L93 Difference]: Finished difference Result 6746 states and 8412 transitions. [2021-11-19 14:57:43,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:57:43,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-19 14:57:43,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:57:43,992 INFO L225 Difference]: With dead ends: 6746 [2021-11-19 14:57:43,992 INFO L226 Difference]: Without dead ends: 4240 [2021-11-19 14:57:43,997 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 [2021-11-19 14:57:43,998 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 227 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:43,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 358 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:57:44,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4240 states. [2021-11-19 14:57:44,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4240 to 3632. [2021-11-19 14:57:44,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3632 states, 3631 states have (on average 1.2263839162765078) internal successors, (4453), 3631 states have internal predecessors, (4453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:44,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3632 states to 3632 states and 4453 transitions. [2021-11-19 14:57:44,564 INFO L78 Accepts]: Start accepts. Automaton has 3632 states and 4453 transitions. Word has length 132 [2021-11-19 14:57:44,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:57:44,565 INFO L470 AbstractCegarLoop]: Abstraction has 3632 states and 4453 transitions. [2021-11-19 14:57:44,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:44,565 INFO L276 IsEmpty]: Start isEmpty. Operand 3632 states and 4453 transitions. [2021-11-19 14:57:44,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-19 14:57:44,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:44,571 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:44,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-19 14:57:44,571 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:57:44,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:44,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1711263730, now seen corresponding path program 1 times [2021-11-19 14:57:44,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:57:44,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012823167] [2021-11-19 14:57:44,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:44,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:57:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:44,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:44,613 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:57:44,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012823167] [2021-11-19 14:57:44,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012823167] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:57:44,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:57:44,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:57:44,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109753821] [2021-11-19 14:57:44,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:57:44,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:57:44,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:57:44,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:57:44,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:57:44,616 INFO L87 Difference]: Start difference. First operand 3632 states and 4453 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:45,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:57:45,095 INFO L93 Difference]: Finished difference Result 6027 states and 7401 transitions. [2021-11-19 14:57:45,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:57:45,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-19 14:57:45,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:57:45,114 INFO L225 Difference]: With dead ends: 6027 [2021-11-19 14:57:45,114 INFO L226 Difference]: Without dead ends: 3636 [2021-11-19 14:57:45,119 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 [2021-11-19 14:57:45,120 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 207 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:45,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 243 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:57:45,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3636 states. [2021-11-19 14:57:45,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3636 to 3584. [2021-11-19 14:57:45,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3584 states, 3583 states have (on average 1.2154619034328775) internal successors, (4355), 3583 states have internal predecessors, (4355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:45,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3584 states to 3584 states and 4355 transitions. [2021-11-19 14:57:45,697 INFO L78 Accepts]: Start accepts. Automaton has 3584 states and 4355 transitions. Word has length 132 [2021-11-19 14:57:45,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:57:45,698 INFO L470 AbstractCegarLoop]: Abstraction has 3584 states and 4355 transitions. [2021-11-19 14:57:45,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:45,698 INFO L276 IsEmpty]: Start isEmpty. Operand 3584 states and 4355 transitions. [2021-11-19 14:57:45,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-19 14:57:45,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:45,705 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:45,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-19 14:57:45,706 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:57:45,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:45,706 INFO L85 PathProgramCache]: Analyzing trace with hash -607722230, now seen corresponding path program 1 times [2021-11-19 14:57:45,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:57:45,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443025081] [2021-11-19 14:57:45,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:45,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:57:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:45,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:45,775 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:57:45,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443025081] [2021-11-19 14:57:45,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443025081] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:57:45,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:57:45,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:57:45,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885692322] [2021-11-19 14:57:45,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:57:45,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:57:45,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:57:45,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:57:45,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:57:45,781 INFO L87 Difference]: Start difference. First operand 3584 states and 4355 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:46,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:57:46,320 INFO L93 Difference]: Finished difference Result 6170 states and 7544 transitions. [2021-11-19 14:57:46,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:57:46,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-19 14:57:46,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:57:46,329 INFO L225 Difference]: With dead ends: 6170 [2021-11-19 14:57:46,329 INFO L226 Difference]: Without dead ends: 3759 [2021-11-19 14:57:46,334 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 [2021-11-19 14:57:46,335 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 200 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:46,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 275 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:57:46,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3759 states. [2021-11-19 14:57:46,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3759 to 3445. [2021-11-19 14:57:46,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3445 states, 3444 states have (on average 1.2099303135888502) internal successors, (4167), 3444 states have internal predecessors, (4167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:46,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3445 states to 3445 states and 4167 transitions. [2021-11-19 14:57:46,813 INFO L78 Accepts]: Start accepts. Automaton has 3445 states and 4167 transitions. Word has length 132 [2021-11-19 14:57:46,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:57:46,814 INFO L470 AbstractCegarLoop]: Abstraction has 3445 states and 4167 transitions. [2021-11-19 14:57:46,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:46,814 INFO L276 IsEmpty]: Start isEmpty. Operand 3445 states and 4167 transitions. [2021-11-19 14:57:46,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-19 14:57:46,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:46,820 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:46,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-19 14:57:46,820 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:57:46,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:46,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1732039385, now seen corresponding path program 1 times [2021-11-19 14:57:46,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:57:46,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274608135] [2021-11-19 14:57:46,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:46,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:57:46,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:46,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:46,884 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:57:46,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274608135] [2021-11-19 14:57:46,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274608135] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:57:46,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:57:46,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:57:46,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753064021] [2021-11-19 14:57:46,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:57:46,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:57:46,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:57:46,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:57:46,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:57:46,887 INFO L87 Difference]: Start difference. First operand 3445 states and 4167 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:47,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:57:47,397 INFO L93 Difference]: Finished difference Result 6109 states and 7452 transitions. [2021-11-19 14:57:47,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:57:47,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-19 14:57:47,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:57:47,407 INFO L225 Difference]: With dead ends: 6109 [2021-11-19 14:57:47,407 INFO L226 Difference]: Without dead ends: 3712 [2021-11-19 14:57:47,412 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 [2021-11-19 14:57:47,413 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 201 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:47,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 279 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:57:47,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3712 states. [2021-11-19 14:57:47,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3712 to 3402. [2021-11-19 14:57:47,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3402 states, 3401 states have (on average 1.1993531314319317) internal successors, (4079), 3401 states have internal predecessors, (4079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:47,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3402 states to 3402 states and 4079 transitions. [2021-11-19 14:57:47,882 INFO L78 Accepts]: Start accepts. Automaton has 3402 states and 4079 transitions. Word has length 132 [2021-11-19 14:57:47,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:57:47,883 INFO L470 AbstractCegarLoop]: Abstraction has 3402 states and 4079 transitions. [2021-11-19 14:57:47,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:47,883 INFO L276 IsEmpty]: Start isEmpty. Operand 3402 states and 4079 transitions. [2021-11-19 14:57:47,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-19 14:57:47,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:47,888 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:47,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-19 14:57:47,888 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:57:47,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:47,889 INFO L85 PathProgramCache]: Analyzing trace with hash -2064800501, now seen corresponding path program 1 times [2021-11-19 14:57:47,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:57:47,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679700222] [2021-11-19 14:57:47,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:47,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:57:47,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:47,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:47,941 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:57:47,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679700222] [2021-11-19 14:57:47,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679700222] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:57:47,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:57:47,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:57:47,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154458145] [2021-11-19 14:57:47,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:57:47,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:57:47,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:57:47,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:57:47,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:57:47,943 INFO L87 Difference]: Start difference. First operand 3402 states and 4079 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:48,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:57:48,498 INFO L93 Difference]: Finished difference Result 6282 states and 7607 transitions. [2021-11-19 14:57:48,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:57:48,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-19 14:57:48,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:57:48,508 INFO L225 Difference]: With dead ends: 6282 [2021-11-19 14:57:48,508 INFO L226 Difference]: Without dead ends: 3885 [2021-11-19 14:57:48,513 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 [2021-11-19 14:57:48,514 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 194 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:48,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 297 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:57:48,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3885 states. [2021-11-19 14:57:49,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3885 to 3331. [2021-11-19 14:57:49,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3331 states, 3330 states have (on average 1.1897897897897898) internal successors, (3962), 3330 states have internal predecessors, (3962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:49,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3331 states to 3331 states and 3962 transitions. [2021-11-19 14:57:49,031 INFO L78 Accepts]: Start accepts. Automaton has 3331 states and 3962 transitions. Word has length 132 [2021-11-19 14:57:49,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:57:49,031 INFO L470 AbstractCegarLoop]: Abstraction has 3331 states and 3962 transitions. [2021-11-19 14:57:49,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:49,031 INFO L276 IsEmpty]: Start isEmpty. Operand 3331 states and 3962 transitions. [2021-11-19 14:57:49,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-19 14:57:49,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:49,036 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:49,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-19 14:57:49,036 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:57:49,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:49,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1866744555, now seen corresponding path program 1 times [2021-11-19 14:57:49,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:57:49,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095554317] [2021-11-19 14:57:49,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:49,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:57:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:49,094 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:57:49,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095554317] [2021-11-19 14:57:49,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095554317] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:57:49,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:57:49,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:57:49,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927144258] [2021-11-19 14:57:49,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:57:49,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:57:49,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:57:49,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:57:49,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:57:49,097 INFO L87 Difference]: Start difference. First operand 3331 states and 3962 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:49,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:57:49,617 INFO L93 Difference]: Finished difference Result 5508 states and 6578 transitions. [2021-11-19 14:57:49,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:57:49,617 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-19 14:57:49,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:57:49,621 INFO L225 Difference]: With dead ends: 5508 [2021-11-19 14:57:49,621 INFO L226 Difference]: Without dead ends: 3255 [2021-11-19 14:57:49,626 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 [2021-11-19 14:57:49,626 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 174 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:49,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 217 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:57:49,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2021-11-19 14:57:49,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 3203. [2021-11-19 14:57:49,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 3202 states have (on average 1.179575265459088) internal successors, (3777), 3202 states have internal predecessors, (3777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:49,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 3777 transitions. [2021-11-19 14:57:49,956 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 3777 transitions. Word has length 132 [2021-11-19 14:57:49,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:57:49,956 INFO L470 AbstractCegarLoop]: Abstraction has 3203 states and 3777 transitions. [2021-11-19 14:57:49,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:57:49,956 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 3777 transitions. [2021-11-19 14:57:49,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 14:57:49,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:49,961 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] [2021-11-19 14:57:49,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-19 14:57:49,961 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:57:49,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:49,962 INFO L85 PathProgramCache]: Analyzing trace with hash 112511356, now seen corresponding path program 1 times [2021-11-19 14:57:49,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:57:49,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778378763] [2021-11-19 14:57:49,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:49,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:57:50,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:58:05,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:58:05,034 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:58:05,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778378763] [2021-11-19 14:58:05,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778378763] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:58:05,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:58:05,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-11-19 14:58:05,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664056844] [2021-11-19 14:58:05,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:58:05,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-19 14:58:05,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:58:05,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-19 14:58:05,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1796, Unknown=0, NotChecked=0, Total=2070 [2021-11-19 14:58:05,037 INFO L87 Difference]: Start difference. First operand 3203 states and 3777 transitions. Second operand has 46 states, 46 states have (on average 2.9782608695652173) internal successors, (137), 45 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:58:25,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:58:25,789 INFO L93 Difference]: Finished difference Result 3399 states and 4025 transitions. [2021-11-19 14:58:25,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-19 14:58:25,789 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.9782608695652173) internal successors, (137), 45 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-19 14:58:25,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:58:25,792 INFO L225 Difference]: With dead ends: 3399 [2021-11-19 14:58:25,792 INFO L226 Difference]: Without dead ends: 3204 [2021-11-19 14:58:25,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=1108, Invalid=4898, Unknown=0, NotChecked=0, Total=6006 [2021-11-19 14:58:25,795 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 1183 mSDsluCounter, 3821 mSDsCounter, 0 mSdLazyCounter, 4035 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1183 SdHoareTripleChecker+Valid, 4039 SdHoareTripleChecker+Invalid, 4079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 4035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:58:25,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1183 Valid, 4039 Invalid, 4079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 4035 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-11-19 14:58:25,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3204 states. [2021-11-19 14:58:26,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3204 to 3202. [2021-11-19 14:58:26,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3202 states, 3201 states have (on average 1.1790065604498594) internal successors, (3774), 3201 states have internal predecessors, (3774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:58:26,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3202 states to 3202 states and 3774 transitions. [2021-11-19 14:58:26,067 INFO L78 Accepts]: Start accepts. Automaton has 3202 states and 3774 transitions. Word has length 137 [2021-11-19 14:58:26,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:58:26,067 INFO L470 AbstractCegarLoop]: Abstraction has 3202 states and 3774 transitions. [2021-11-19 14:58:26,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.9782608695652173) internal successors, (137), 45 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:58:26,067 INFO L276 IsEmpty]: Start isEmpty. Operand 3202 states and 3774 transitions. [2021-11-19 14:58:26,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 14:58:26,071 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:58:26,071 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] [2021-11-19 14:58:26,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-19 14:58:26,071 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:58:26,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:58:26,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1748699588, now seen corresponding path program 1 times [2021-11-19 14:58:26,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:58:26,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839300438] [2021-11-19 14:58:26,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:58:26,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:58:26,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:58:44,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:58:44,238 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:58:44,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839300438] [2021-11-19 14:58:44,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839300438] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:58:44,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:58:44,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-19 14:58:44,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74348374] [2021-11-19 14:58:44,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:58:44,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-19 14:58:44,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:58:44,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-19 14:58:44,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1981, Unknown=0, NotChecked=0, Total=2256 [2021-11-19 14:58:44,242 INFO L87 Difference]: Start difference. First operand 3202 states and 3774 transitions. Second operand has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:59:15,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:59:15,734 INFO L93 Difference]: Finished difference Result 3493 states and 4149 transitions. [2021-11-19 14:59:15,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-19 14:59:15,735 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-19 14:59:15,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:59:15,743 INFO L225 Difference]: With dead ends: 3493 [2021-11-19 14:59:15,743 INFO L226 Difference]: Without dead ends: 3294 [2021-11-19 14:59:15,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=1202, Invalid=5938, Unknown=0, NotChecked=0, Total=7140 [2021-11-19 14:59:15,780 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 1310 mSDsluCounter, 5932 mSDsCounter, 0 mSdLazyCounter, 6145 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1310 SdHoareTripleChecker+Valid, 6137 SdHoareTripleChecker+Invalid, 6182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 6145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:59:15,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1310 Valid, 6137 Invalid, 6182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 6145 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2021-11-19 14:59:15,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3294 states. [2021-11-19 14:59:16,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3294 to 3201. [2021-11-19 14:59:16,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3201 states, 3200 states have (on average 1.1784375) internal successors, (3771), 3200 states have internal predecessors, (3771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:59:16,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 3771 transitions. [2021-11-19 14:59:16,207 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 3771 transitions. Word has length 137 [2021-11-19 14:59:16,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:59:16,207 INFO L470 AbstractCegarLoop]: Abstraction has 3201 states and 3771 transitions. [2021-11-19 14:59:16,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:59:16,207 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 3771 transitions. [2021-11-19 14:59:16,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 14:59:16,211 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:59:16,212 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:59:16,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-19 14:59:16,212 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:59:16,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:59:16,213 INFO L85 PathProgramCache]: Analyzing trace with hash -789317570, now seen corresponding path program 1 times [2021-11-19 14:59:16,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:59:16,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499557413] [2021-11-19 14:59:16,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:59:16,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:59:16,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:59:51,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:59:51,235 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:59:51,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499557413] [2021-11-19 14:59:51,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499557413] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:59:51,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:59:51,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-19 14:59:51,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868069842] [2021-11-19 14:59:51,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:59:51,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-19 14:59:51,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:59:51,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-19 14:59:51,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1891, Unknown=0, NotChecked=0, Total=2256 [2021-11-19 14:59:51,237 INFO L87 Difference]: Start difference. First operand 3201 states and 3771 transitions. Second operand has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:00:29,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:00:29,754 INFO L93 Difference]: Finished difference Result 3281 states and 3873 transitions. [2021-11-19 15:00:29,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-19 15:00:29,755 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-19 15:00:29,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:00:29,758 INFO L225 Difference]: With dead ends: 3281 [2021-11-19 15:00:29,758 INFO L226 Difference]: Without dead ends: 3202 [2021-11-19 15:00:29,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1581 ImplicationChecksByTransitivity, 41.5s TimeCoverageRelationStatistics Valid=1230, Invalid=5576, Unknown=0, NotChecked=0, Total=6806 [2021-11-19 15:00:29,763 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 1215 mSDsluCounter, 2601 mSDsCounter, 0 mSdLazyCounter, 3018 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1215 SdHoareTripleChecker+Valid, 2814 SdHoareTripleChecker+Invalid, 3059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 3018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:00:29,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1215 Valid, 2814 Invalid, 3059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 3018 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2021-11-19 15:00:29,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3202 states. [2021-11-19 15:00:30,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3202 to 3200. [2021-11-19 15:00:30,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3200 states, 3199 states have (on average 1.1781806814629572) internal successors, (3769), 3199 states have internal predecessors, (3769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:00:30,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3200 states to 3200 states and 3769 transitions. [2021-11-19 15:00:30,139 INFO L78 Accepts]: Start accepts. Automaton has 3200 states and 3769 transitions. Word has length 137 [2021-11-19 15:00:30,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:00:30,140 INFO L470 AbstractCegarLoop]: Abstraction has 3200 states and 3769 transitions. [2021-11-19 15:00:30,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:00:30,140 INFO L276 IsEmpty]: Start isEmpty. Operand 3200 states and 3769 transitions. [2021-11-19 15:00:30,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 15:00:30,145 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:00:30,145 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] [2021-11-19 15:00:30,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-19 15:00:30,146 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:00:30,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:00:30,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1150163585, now seen corresponding path program 1 times [2021-11-19 15:00:30,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:00:30,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449144260] [2021-11-19 15:00:30,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:00:30,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:00:30,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:00:39,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:00:39,332 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:00:39,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449144260] [2021-11-19 15:00:39,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449144260] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:00:39,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:00:39,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-11-19 15:00:39,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136974416] [2021-11-19 15:00:39,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:00:39,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-19 15:00:39,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:00:39,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-19 15:00:39,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1510, Unknown=0, NotChecked=0, Total=1722 [2021-11-19 15:00:39,335 INFO L87 Difference]: Start difference. First operand 3200 states and 3769 transitions. Second operand has 42 states, 42 states have (on average 3.261904761904762) internal successors, (137), 41 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:00:50,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:00:50,505 INFO L93 Difference]: Finished difference Result 5877 states and 7360 transitions. [2021-11-19 15:00:50,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-19 15:00:50,506 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.261904761904762) internal successors, (137), 41 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-19 15:00:50,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:00:50,511 INFO L225 Difference]: With dead ends: 5877 [2021-11-19 15:00:50,511 INFO L226 Difference]: Without dead ends: 4470 [2021-11-19 15:00:50,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=862, Invalid=4990, Unknown=0, NotChecked=0, Total=5852 [2021-11-19 15:00:50,515 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 1667 mSDsluCounter, 3446 mSDsCounter, 0 mSdLazyCounter, 3588 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1667 SdHoareTripleChecker+Valid, 3651 SdHoareTripleChecker+Invalid, 3665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 3588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-19 15:00:50,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1667 Valid, 3651 Invalid, 3665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 3588 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-11-19 15:00:50,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4470 states. [2021-11-19 15:00:51,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4470 to 4464. [2021-11-19 15:00:51,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4464 states, 4463 states have (on average 1.2184629173201882) internal successors, (5438), 4463 states have internal predecessors, (5438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:00:51,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4464 states to 4464 states and 5438 transitions. [2021-11-19 15:00:51,052 INFO L78 Accepts]: Start accepts. Automaton has 4464 states and 5438 transitions. Word has length 137 [2021-11-19 15:00:51,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:00:51,052 INFO L470 AbstractCegarLoop]: Abstraction has 4464 states and 5438 transitions. [2021-11-19 15:00:51,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.261904761904762) internal successors, (137), 41 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:00:51,053 INFO L276 IsEmpty]: Start isEmpty. Operand 4464 states and 5438 transitions. [2021-11-19 15:00:51,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 15:00:51,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:00:51,056 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] [2021-11-19 15:00:51,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-19 15:00:51,056 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:00:51,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:00:51,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1282955962, now seen corresponding path program 1 times [2021-11-19 15:00:51,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:00:51,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387386902] [2021-11-19 15:00:51,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:00:51,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:00:51,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:01:15,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:01:15,128 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:01:15,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387386902] [2021-11-19 15:01:15,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387386902] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:01:15,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:01:15,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-19 15:01:15,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191658450] [2021-11-19 15:01:15,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:01:15,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-19 15:01:15,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:01:15,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-19 15:01:15,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=1921, Unknown=0, NotChecked=0, Total=2256 [2021-11-19 15:01:15,131 INFO L87 Difference]: Start difference. First operand 4464 states and 5438 transitions. Second operand has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:01:36,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:01:36,571 INFO L93 Difference]: Finished difference Result 5421 states and 6647 transitions. [2021-11-19 15:01:36,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-19 15:01:36,572 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-19 15:01:36,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:01:36,577 INFO L225 Difference]: With dead ends: 5421 [2021-11-19 15:01:36,577 INFO L226 Difference]: Without dead ends: 4506 [2021-11-19 15:01:36,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1686 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=1245, Invalid=5895, Unknown=0, NotChecked=0, Total=7140 [2021-11-19 15:01:36,583 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 1404 mSDsluCounter, 3121 mSDsCounter, 0 mSdLazyCounter, 3173 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1404 SdHoareTripleChecker+Valid, 3364 SdHoareTripleChecker+Invalid, 3216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 3173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:01:36,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1404 Valid, 3364 Invalid, 3216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 3173 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-11-19 15:01:36,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4506 states. [2021-11-19 15:01:37,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4506 to 4478. [2021-11-19 15:01:37,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4478 states, 4477 states have (on average 1.2168863077953986) internal successors, (5448), 4477 states have internal predecessors, (5448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:01:37,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4478 states to 4478 states and 5448 transitions. [2021-11-19 15:01:37,196 INFO L78 Accepts]: Start accepts. Automaton has 4478 states and 5448 transitions. Word has length 137 [2021-11-19 15:01:37,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:01:37,196 INFO L470 AbstractCegarLoop]: Abstraction has 4478 states and 5448 transitions. [2021-11-19 15:01:37,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:01:37,197 INFO L276 IsEmpty]: Start isEmpty. Operand 4478 states and 5448 transitions. [2021-11-19 15:01:37,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 15:01:37,201 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:01:37,202 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] [2021-11-19 15:01:37,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-19 15:01:37,202 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:01:37,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:01:37,203 INFO L85 PathProgramCache]: Analyzing trace with hash -578254982, now seen corresponding path program 1 times [2021-11-19 15:01:37,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:01:37,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862685351] [2021-11-19 15:01:37,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:37,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:01:37,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:01:55,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:01:55,169 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:01:55,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862685351] [2021-11-19 15:01:55,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862685351] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:01:55,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:01:55,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-11-19 15:01:55,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423539133] [2021-11-19 15:01:55,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:01:55,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-19 15:01:55,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:01:55,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-19 15:01:55,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1699, Unknown=0, NotChecked=0, Total=1980 [2021-11-19 15:01:55,173 INFO L87 Difference]: Start difference. First operand 4478 states and 5448 transitions. Second operand has 45 states, 45 states have (on average 3.0444444444444443) internal successors, (137), 44 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:02:19,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:02:19,849 INFO L93 Difference]: Finished difference Result 5143 states and 6303 transitions. [2021-11-19 15:02:19,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-19 15:02:19,850 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.0444444444444443) internal successors, (137), 44 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-19 15:02:19,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:02:19,855 INFO L225 Difference]: With dead ends: 5143 [2021-11-19 15:02:19,855 INFO L226 Difference]: Without dead ends: 4505 [2021-11-19 15:02:19,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=1104, Invalid=4902, Unknown=0, NotChecked=0, Total=6006 [2021-11-19 15:02:19,858 INFO L933 BasicCegarLoop]: 327 mSDtfsCounter, 1251 mSDsluCounter, 4819 mSDsCounter, 0 mSdLazyCounter, 4751 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 5085 SdHoareTripleChecker+Invalid, 4782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 4751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:02:19,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1251 Valid, 5085 Invalid, 4782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 4751 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2021-11-19 15:02:19,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4505 states. [2021-11-19 15:02:20,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4505 to 4477. [2021-11-19 15:02:20,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4477 states, 4476 states have (on average 1.2164879356568365) internal successors, (5445), 4476 states have internal predecessors, (5445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:02:20,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4477 states to 4477 states and 5445 transitions. [2021-11-19 15:02:20,362 INFO L78 Accepts]: Start accepts. Automaton has 4477 states and 5445 transitions. Word has length 137 [2021-11-19 15:02:20,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:02:20,362 INFO L470 AbstractCegarLoop]: Abstraction has 4477 states and 5445 transitions. [2021-11-19 15:02:20,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.0444444444444443) internal successors, (137), 44 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:02:20,363 INFO L276 IsEmpty]: Start isEmpty. Operand 4477 states and 5445 transitions. [2021-11-19 15:02:20,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 15:02:20,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:02:20,367 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] [2021-11-19 15:02:20,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-19 15:02:20,367 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:02:20,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:02:20,368 INFO L85 PathProgramCache]: Analyzing trace with hash -625797254, now seen corresponding path program 1 times [2021-11-19 15:02:20,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:02:20,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569185254] [2021-11-19 15:02:20,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:02:20,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:02:20,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:51,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:02:51,963 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:02:51,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569185254] [2021-11-19 15:02:51,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569185254] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:02:51,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:02:51,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-19 15:02:51,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147548633] [2021-11-19 15:02:51,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:02:51,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-19 15:02:51,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:02:51,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-19 15:02:51,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=1928, Unknown=0, NotChecked=0, Total=2256 [2021-11-19 15:02:51,966 INFO L87 Difference]: Start difference. First operand 4477 states and 5445 transitions. Second operand has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:03:14,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:03:14,065 INFO L93 Difference]: Finished difference Result 4928 states and 5989 transitions. [2021-11-19 15:03:14,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-19 15:03:14,066 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-19 15:03:14,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:03:14,071 INFO L225 Difference]: With dead ends: 4928 [2021-11-19 15:03:14,071 INFO L226 Difference]: Without dead ends: 4604 [2021-11-19 15:03:14,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=1070, Invalid=4782, Unknown=0, NotChecked=0, Total=5852 [2021-11-19 15:03:14,073 INFO L933 BasicCegarLoop]: 296 mSDtfsCounter, 1300 mSDsluCounter, 3181 mSDsCounter, 0 mSdLazyCounter, 3302 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1300 SdHoareTripleChecker+Valid, 3436 SdHoareTripleChecker+Invalid, 3343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 3302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:03:14,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1300 Valid, 3436 Invalid, 3343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 3302 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2021-11-19 15:03:14,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4604 states. [2021-11-19 15:03:14,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4604 to 4476. [2021-11-19 15:03:14,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4476 states, 4475 states have (on average 1.2160893854748602) internal successors, (5442), 4475 states have internal predecessors, (5442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:03:14,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4476 states to 4476 states and 5442 transitions. [2021-11-19 15:03:14,596 INFO L78 Accepts]: Start accepts. Automaton has 4476 states and 5442 transitions. Word has length 137 [2021-11-19 15:03:14,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:03:14,597 INFO L470 AbstractCegarLoop]: Abstraction has 4476 states and 5442 transitions. [2021-11-19 15:03:14,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:03:14,597 INFO L276 IsEmpty]: Start isEmpty. Operand 4476 states and 5442 transitions. [2021-11-19 15:03:14,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 15:03:14,600 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:03:14,600 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] [2021-11-19 15:03:14,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-19 15:03:14,600 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:03:14,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:03:14,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1960798270, now seen corresponding path program 1 times [2021-11-19 15:03:14,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:03:14,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615265978] [2021-11-19 15:03:14,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:14,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:03:14,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:33,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:03:33,431 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:03:33,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615265978] [2021-11-19 15:03:33,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615265978] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:03:33,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:03:33,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-19 15:03:33,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274267859] [2021-11-19 15:03:33,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:03:33,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-19 15:03:33,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:03:33,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-19 15:03:33,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=1904, Unknown=0, NotChecked=0, Total=2256 [2021-11-19 15:03:33,434 INFO L87 Difference]: Start difference. First operand 4476 states and 5442 transitions. Second operand has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:03:53,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:03:53,857 INFO L93 Difference]: Finished difference Result 5217 states and 6379 transitions. [2021-11-19 15:03:53,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-19 15:03:53,858 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-19 15:03:53,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:03:53,862 INFO L225 Difference]: With dead ends: 5217 [2021-11-19 15:03:53,862 INFO L226 Difference]: Without dead ends: 4462 [2021-11-19 15:03:53,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1433 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=1176, Invalid=5466, Unknown=0, NotChecked=0, Total=6642 [2021-11-19 15:03:53,863 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 1104 mSDsluCounter, 3847 mSDsCounter, 0 mSdLazyCounter, 4261 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1104 SdHoareTripleChecker+Valid, 4076 SdHoareTripleChecker+Invalid, 4291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 4261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:03:53,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1104 Valid, 4076 Invalid, 4291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 4261 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-11-19 15:03:53,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4462 states. [2021-11-19 15:03:54,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4462 to 4460. [2021-11-19 15:03:54,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4460 states, 4459 states have (on average 1.2159677057636242) internal successors, (5422), 4459 states have internal predecessors, (5422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:03:54,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4460 states to 4460 states and 5422 transitions. [2021-11-19 15:03:54,320 INFO L78 Accepts]: Start accepts. Automaton has 4460 states and 5422 transitions. Word has length 137 [2021-11-19 15:03:54,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:03:54,320 INFO L470 AbstractCegarLoop]: Abstraction has 4460 states and 5422 transitions. [2021-11-19 15:03:54,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 47 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:03:54,320 INFO L276 IsEmpty]: Start isEmpty. Operand 4460 states and 5422 transitions. [2021-11-19 15:03:54,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 15:03:54,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:03:54,323 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] [2021-11-19 15:03:54,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-19 15:03:54,323 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:03:54,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:03:54,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1056785509, now seen corresponding path program 1 times [2021-11-19 15:03:54,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:03:54,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806244286] [2021-11-19 15:03:54,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:54,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:03:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:04:03,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:04:03,564 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:04:03,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806244286] [2021-11-19 15:04:03,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806244286] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:04:03,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:04:03,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-11-19 15:04:03,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173388231] [2021-11-19 15:04:03,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:04:03,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-19 15:04:03,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:04:03,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-19 15:04:03,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1534, Unknown=0, NotChecked=0, Total=1806 [2021-11-19 15:04:03,566 INFO L87 Difference]: Start difference. First operand 4460 states and 5422 transitions. Second operand has 43 states, 43 states have (on average 3.186046511627907) internal successors, (137), 42 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:04:15,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:04:15,214 INFO L93 Difference]: Finished difference Result 6439 states and 8088 transitions. [2021-11-19 15:04:15,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-19 15:04:15,215 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.186046511627907) internal successors, (137), 42 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-19 15:04:15,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:04:15,219 INFO L225 Difference]: With dead ends: 6439 [2021-11-19 15:04:15,219 INFO L226 Difference]: Without dead ends: 5280 [2021-11-19 15:04:15,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=722, Invalid=3970, Unknown=0, NotChecked=0, Total=4692 [2021-11-19 15:04:15,222 INFO L933 BasicCegarLoop]: 358 mSDtfsCounter, 937 mSDsluCounter, 4522 mSDsCounter, 0 mSdLazyCounter, 4476 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 4784 SdHoareTripleChecker+Invalid, 4509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 4476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:04:15,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [937 Valid, 4784 Invalid, 4509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 4476 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-11-19 15:04:15,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5280 states. [2021-11-19 15:04:15,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5280 to 4815. [2021-11-19 15:04:15,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4815 states, 4814 states have (on average 1.2255920232654758) internal successors, (5900), 4814 states have internal predecessors, (5900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:04:15,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4815 states to 4815 states and 5900 transitions. [2021-11-19 15:04:15,799 INFO L78 Accepts]: Start accepts. Automaton has 4815 states and 5900 transitions. Word has length 137 [2021-11-19 15:04:15,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:04:15,799 INFO L470 AbstractCegarLoop]: Abstraction has 4815 states and 5900 transitions. [2021-11-19 15:04:15,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.186046511627907) internal successors, (137), 42 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:04:15,800 INFO L276 IsEmpty]: Start isEmpty. Operand 4815 states and 5900 transitions. [2021-11-19 15:04:15,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 15:04:15,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:04:15,802 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] [2021-11-19 15:04:15,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-19 15:04:15,802 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:04:15,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:04:15,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1593609860, now seen corresponding path program 1 times [2021-11-19 15:04:15,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:04:15,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830892394] [2021-11-19 15:04:15,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:04:15,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:04:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:04:32,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:04:32,185 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:04:32,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830892394] [2021-11-19 15:04:32,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830892394] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:04:32,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:04:32,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-11-19 15:04:32,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284228917] [2021-11-19 15:04:32,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:04:32,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-19 15:04:32,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:04:32,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-19 15:04:32,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1770, Unknown=0, NotChecked=0, Total=2070 [2021-11-19 15:04:32,187 INFO L87 Difference]: Start difference. First operand 4815 states and 5900 transitions. Second operand has 46 states, 46 states have (on average 2.9782608695652173) internal successors, (137), 45 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:04:46,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:04:46,561 INFO L93 Difference]: Finished difference Result 5642 states and 6924 transitions. [2021-11-19 15:04:46,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-19 15:04:46,562 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.9782608695652173) internal successors, (137), 45 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-19 15:04:46,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:04:46,567 INFO L225 Difference]: With dead ends: 5642 [2021-11-19 15:04:46,567 INFO L226 Difference]: Without dead ends: 4901 [2021-11-19 15:04:46,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=1158, Invalid=5004, Unknown=0, NotChecked=0, Total=6162 [2021-11-19 15:04:46,570 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 1293 mSDsluCounter, 2135 mSDsCounter, 0 mSdLazyCounter, 2195 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1293 SdHoareTripleChecker+Valid, 2421 SdHoareTripleChecker+Invalid, 2233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-19 15:04:46,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1293 Valid, 2421 Invalid, 2233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2195 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-19 15:04:46,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4901 states. [2021-11-19 15:04:47,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4901 to 4814. [2021-11-19 15:04:47,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4814 states, 4813 states have (on average 1.2250155827965925) internal successors, (5896), 4813 states have internal predecessors, (5896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:04:47,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4814 states to 4814 states and 5896 transitions. [2021-11-19 15:04:47,139 INFO L78 Accepts]: Start accepts. Automaton has 4814 states and 5896 transitions. Word has length 137 [2021-11-19 15:04:47,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:04:47,139 INFO L470 AbstractCegarLoop]: Abstraction has 4814 states and 5896 transitions. [2021-11-19 15:04:47,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.9782608695652173) internal successors, (137), 45 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:04:47,139 INFO L276 IsEmpty]: Start isEmpty. Operand 4814 states and 5896 transitions. [2021-11-19 15:04:47,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 15:04:47,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:04:47,142 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] [2021-11-19 15:04:47,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-19 15:04:47,142 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:04:47,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:04:47,142 INFO L85 PathProgramCache]: Analyzing trace with hash -634227842, now seen corresponding path program 1 times [2021-11-19 15:04:47,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:04:47,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005418905] [2021-11-19 15:04:47,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:04:47,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:04:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:05:32,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:05:32,677 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:05:32,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005418905] [2021-11-19 15:05:32,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005418905] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:05:32,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:05:32,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-11-19 15:05:32,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714824876] [2021-11-19 15:05:32,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:05:32,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-19 15:05:32,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:05:32,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-19 15:05:32,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=1653, Unknown=0, NotChecked=0, Total=2070 [2021-11-19 15:05:32,679 INFO L87 Difference]: Start difference. First operand 4814 states and 5896 transitions. Second operand has 46 states, 46 states have (on average 2.9782608695652173) internal successors, (137), 45 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:06:00,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:06:00,548 INFO L93 Difference]: Finished difference Result 5389 states and 6623 transitions. [2021-11-19 15:06:00,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-19 15:06:00,549 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.9782608695652173) internal successors, (137), 45 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-19 15:06:00,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:06:00,553 INFO L225 Difference]: With dead ends: 5389 [2021-11-19 15:06:00,553 INFO L226 Difference]: Without dead ends: 5039 [2021-11-19 15:06:00,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 28.6s TimeCoverageRelationStatistics Valid=1096, Invalid=4306, Unknown=0, NotChecked=0, Total=5402 [2021-11-19 15:06:00,555 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 983 mSDsluCounter, 3922 mSDsCounter, 0 mSdLazyCounter, 3926 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 4215 SdHoareTripleChecker+Invalid, 3955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 3926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:06:00,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [983 Valid, 4215 Invalid, 3955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 3926 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2021-11-19 15:06:00,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5039 states. [2021-11-19 15:06:01,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5039 to 4813. [2021-11-19 15:06:01,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4813 states, 4812 states have (on average 1.2246467165419783) internal successors, (5893), 4812 states have internal predecessors, (5893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:06:01,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4813 states to 4813 states and 5893 transitions. [2021-11-19 15:06:01,139 INFO L78 Accepts]: Start accepts. Automaton has 4813 states and 5893 transitions. Word has length 137 [2021-11-19 15:06:01,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:06:01,139 INFO L470 AbstractCegarLoop]: Abstraction has 4813 states and 5893 transitions. [2021-11-19 15:06:01,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.9782608695652173) internal successors, (137), 45 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:06:01,139 INFO L276 IsEmpty]: Start isEmpty. Operand 4813 states and 5893 transitions. [2021-11-19 15:06:01,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 15:06:01,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:06:01,142 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] [2021-11-19 15:06:01,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-19 15:06:01,142 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:06:01,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:06:01,142 INFO L85 PathProgramCache]: Analyzing trace with hash 2031771204, now seen corresponding path program 1 times [2021-11-19 15:06:01,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:06:01,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273116279] [2021-11-19 15:06:01,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:06:01,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:06:01,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:06:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:06:01,904 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:06:01,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273116279] [2021-11-19 15:06:01,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273116279] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:06:01,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:06:01,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-19 15:06:01,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427634468] [2021-11-19 15:06:01,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:06:01,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 15:06:01,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:06:01,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 15:06:01,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-11-19 15:06:01,906 INFO L87 Difference]: Start difference. First operand 4813 states and 5893 transitions. Second operand has 20 states, 20 states have (on average 6.95) internal successors, (139), 20 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:06:05,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:06:05,448 INFO L93 Difference]: Finished difference Result 19497 states and 25774 transitions. [2021-11-19 15:06:05,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-19 15:06:05,449 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.95) internal successors, (139), 20 states have internal predecessors, (139), 0 states have call successors, (0), 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 139 [2021-11-19 15:06:05,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:06:05,468 INFO L225 Difference]: With dead ends: 19497 [2021-11-19 15:06:05,468 INFO L226 Difference]: Without dead ends: 16434 [2021-11-19 15:06:05,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=368, Invalid=1702, Unknown=0, NotChecked=0, Total=2070 [2021-11-19 15:06:05,474 INFO L933 BasicCegarLoop]: 302 mSDtfsCounter, 1425 mSDsluCounter, 3591 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1425 SdHoareTripleChecker+Valid, 3823 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 15:06:05,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1425 Valid, 3823 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1180 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 15:06:05,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16434 states. [2021-11-19 15:06:06,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16434 to 7466. [2021-11-19 15:06:06,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7466 states, 7465 states have (on average 1.244876088412592) internal successors, (9293), 7465 states have internal predecessors, (9293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:06:06,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7466 states to 7466 states and 9293 transitions. [2021-11-19 15:06:06,580 INFO L78 Accepts]: Start accepts. Automaton has 7466 states and 9293 transitions. Word has length 139 [2021-11-19 15:06:06,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:06:06,580 INFO L470 AbstractCegarLoop]: Abstraction has 7466 states and 9293 transitions. [2021-11-19 15:06:06,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.95) internal successors, (139), 20 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:06:06,581 INFO L276 IsEmpty]: Start isEmpty. Operand 7466 states and 9293 transitions. [2021-11-19 15:06:06,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-19 15:06:06,583 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:06:06,583 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:06:06,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-19 15:06:06,584 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:06:06,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:06:06,584 INFO L85 PathProgramCache]: Analyzing trace with hash -2125048684, now seen corresponding path program 1 times [2021-11-19 15:06:06,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:06:06,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510327422] [2021-11-19 15:06:06,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:06:06,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:06:06,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:06:31,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:06:31,275 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:06:31,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510327422] [2021-11-19 15:06:31,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510327422] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:06:31,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:06:31,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-19 15:06:31,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321613458] [2021-11-19 15:06:31,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:06:31,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-19 15:06:31,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:06:31,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-19 15:06:31,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1991, Unknown=0, NotChecked=0, Total=2256 [2021-11-19 15:06:31,277 INFO L87 Difference]: Start difference. First operand 7466 states and 9293 transitions. Second operand has 48 states, 48 states have (on average 2.9791666666666665) internal successors, (143), 47 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:07:00,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:07:00,205 INFO L93 Difference]: Finished difference Result 7744 states and 9646 transitions. [2021-11-19 15:07:00,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-19 15:07:00,205 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.9791666666666665) internal successors, (143), 47 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-19 15:07:00,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:07:00,213 INFO L225 Difference]: With dead ends: 7744 [2021-11-19 15:07:00,214 INFO L226 Difference]: Without dead ends: 7351 [2021-11-19 15:07:00,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1517 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=1238, Invalid=5902, Unknown=0, NotChecked=0, Total=7140 [2021-11-19 15:07:00,217 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 1370 mSDsluCounter, 3498 mSDsCounter, 0 mSdLazyCounter, 3873 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1370 SdHoareTripleChecker+Valid, 3737 SdHoareTripleChecker+Invalid, 3915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 3873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:07:00,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1370 Valid, 3737 Invalid, 3915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 3873 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-11-19 15:07:00,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7351 states. [2021-11-19 15:07:01,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7351 to 7349. [2021-11-19 15:07:01,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7349 states, 7348 states have (on average 1.2446924333151879) internal successors, (9146), 7348 states have internal predecessors, (9146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:07:01,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7349 states to 7349 states and 9146 transitions. [2021-11-19 15:07:01,214 INFO L78 Accepts]: Start accepts. Automaton has 7349 states and 9146 transitions. Word has length 143 [2021-11-19 15:07:01,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:07:01,214 INFO L470 AbstractCegarLoop]: Abstraction has 7349 states and 9146 transitions. [2021-11-19 15:07:01,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.9791666666666665) internal successors, (143), 47 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:07:01,214 INFO L276 IsEmpty]: Start isEmpty. Operand 7349 states and 9146 transitions. [2021-11-19 15:07:01,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-19 15:07:01,217 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:07:01,217 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:07:01,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-19 15:07:01,218 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:07:01,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:07:01,218 INFO L85 PathProgramCache]: Analyzing trace with hash 235721063, now seen corresponding path program 1 times [2021-11-19 15:07:01,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:07:01,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843974905] [2021-11-19 15:07:01,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:07:01,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:07:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:07:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:07:10,884 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:07:10,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843974905] [2021-11-19 15:07:10,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843974905] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:07:10,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:07:10,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-11-19 15:07:10,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147137907] [2021-11-19 15:07:10,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:07:10,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-19 15:07:10,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:07:10,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-19 15:07:10,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1940, Unknown=0, NotChecked=0, Total=2162 [2021-11-19 15:07:10,886 INFO L87 Difference]: Start difference. First operand 7349 states and 9146 transitions. Second operand has 47 states, 47 states have (on average 3.0425531914893615) internal successors, (143), 46 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:07:24,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:07:24,377 INFO L93 Difference]: Finished difference Result 8503 states and 10670 transitions. [2021-11-19 15:07:24,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-19 15:07:24,378 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.0425531914893615) internal successors, (143), 46 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-19 15:07:24,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:07:24,385 INFO L225 Difference]: With dead ends: 8503 [2021-11-19 15:07:24,386 INFO L226 Difference]: Without dead ends: 7973 [2021-11-19 15:07:24,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1587 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=879, Invalid=5601, Unknown=0, NotChecked=0, Total=6480 [2021-11-19 15:07:24,388 INFO L933 BasicCegarLoop]: 335 mSDtfsCounter, 1276 mSDsluCounter, 5334 mSDsCounter, 0 mSdLazyCounter, 5818 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1276 SdHoareTripleChecker+Valid, 5540 SdHoareTripleChecker+Invalid, 5874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 5818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:07:24,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1276 Valid, 5540 Invalid, 5874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 5818 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-11-19 15:07:24,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7973 states. [2021-11-19 15:07:25,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7973 to 7423. [2021-11-19 15:07:25,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7423 states, 7422 states have (on average 1.2446779843707896) internal successors, (9238), 7422 states have internal predecessors, (9238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:07:25,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7423 states to 7423 states and 9238 transitions. [2021-11-19 15:07:25,390 INFO L78 Accepts]: Start accepts. Automaton has 7423 states and 9238 transitions. Word has length 143 [2021-11-19 15:07:25,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:07:25,390 INFO L470 AbstractCegarLoop]: Abstraction has 7423 states and 9238 transitions. [2021-11-19 15:07:25,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.0425531914893615) internal successors, (143), 46 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:07:25,391 INFO L276 IsEmpty]: Start isEmpty. Operand 7423 states and 9238 transitions. [2021-11-19 15:07:25,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-19 15:07:25,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:07:25,393 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:07:25,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-19 15:07:25,393 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:07:25,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:07:25,394 INFO L85 PathProgramCache]: Analyzing trace with hash -772248025, now seen corresponding path program 1 times [2021-11-19 15:07:25,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 15:07:25,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965387155] [2021-11-19 15:07:25,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:07:25,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 15:07:25,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:07:34,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:07:34,790 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 15:07:34,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965387155] [2021-11-19 15:07:34,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965387155] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 15:07:34,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:07:34,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-11-19 15:07:34,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196742060] [2021-11-19 15:07:34,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:07:34,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-19 15:07:34,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 15:07:34,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-19 15:07:34,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=1771, Unknown=0, NotChecked=0, Total=2162 [2021-11-19 15:07:34,791 INFO L87 Difference]: Start difference. First operand 7423 states and 9238 transitions. Second operand has 47 states, 47 states have (on average 3.0425531914893615) internal successors, (143), 46 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)