./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d756e2db-09a1-4302-ab6a-2606b2cfe06e/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d756e2db-09a1-4302-ab6a-2606b2cfe06e/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d756e2db-09a1-4302-ab6a-2606b2cfe06e/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d756e2db-09a1-4302-ab6a-2606b2cfe06e/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d756e2db-09a1-4302-ab6a-2606b2cfe06e/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d756e2db-09a1-4302-ab6a-2606b2cfe06e/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 448913247e8c38d6975c8299b43203acc4129a19332f08af90d09f73955e1f22 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:43:02,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:43:02,073 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:43:02,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:43:02,109 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:43:02,110 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:43:02,112 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:43:02,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:43:02,117 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:43:02,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:43:02,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:43:02,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:43:02,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:43:02,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:43:02,124 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:43:02,125 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:43:02,126 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:43:02,127 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:43:02,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:43:02,132 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:43:02,134 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:43:02,135 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:43:02,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:43:02,138 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:43:02,142 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:43:02,142 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:43:02,142 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:43:02,143 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:43:02,144 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:43:02,145 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:43:02,146 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:43:02,147 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:43:02,147 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:43:02,148 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:43:02,154 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:43:02,154 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:43:02,155 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:43:02,155 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:43:02,155 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:43:02,157 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:43:02,157 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:43:02,158 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d756e2db-09a1-4302-ab6a-2606b2cfe06e/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:43:02,207 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:43:02,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:43:02,209 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:43:02,209 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:43:02,216 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:43:02,216 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:43:02,217 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:43:02,217 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:43:02,217 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:43:02,217 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:43:02,218 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:43:02,219 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:43:02,219 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:43:02,219 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:43:02,219 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:43:02,220 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:43:02,220 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:43:02,220 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:43:02,221 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:43:02,221 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:43:02,221 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:43:02,221 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:43:02,222 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:43:02,222 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:43:02,222 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:43:02,222 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:43:02,224 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:43:02,224 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:43:02,224 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:43:02,225 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:43:02,225 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:43:02,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:43:02,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:43:02,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:43:02,226 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:43:02,226 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:43:02,226 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:43:02,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:43:02,227 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:43:02,227 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:43:02,227 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:43:02,227 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_d756e2db-09a1-4302-ab6a-2606b2cfe06e/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d756e2db-09a1-4302-ab6a-2606b2cfe06e/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 448913247e8c38d6975c8299b43203acc4129a19332f08af90d09f73955e1f22 [2021-11-20 23:43:02,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:43:02,512 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:43:02,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:43:02,515 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:43:02,516 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:43:02,517 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d756e2db-09a1-4302-ab6a-2606b2cfe06e/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c [2021-11-20 23:43:02,596 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d756e2db-09a1-4302-ab6a-2606b2cfe06e/bin/utaipan-TEXQjIfE4P/data/dbfff3689/d1c4692c1d3b4cf7b4be34faf94a32a0/FLAG79783c7fb [2021-11-20 23:43:03,149 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:43:03,150 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d756e2db-09a1-4302-ab6a-2606b2cfe06e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c [2021-11-20 23:43:03,179 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d756e2db-09a1-4302-ab6a-2606b2cfe06e/bin/utaipan-TEXQjIfE4P/data/dbfff3689/d1c4692c1d3b4cf7b4be34faf94a32a0/FLAG79783c7fb [2021-11-20 23:43:03,423 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d756e2db-09a1-4302-ab6a-2606b2cfe06e/bin/utaipan-TEXQjIfE4P/data/dbfff3689/d1c4692c1d3b4cf7b4be34faf94a32a0 [2021-11-20 23:43:03,428 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:43:03,429 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:43:03,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:43:03,434 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:43:03,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:43:03,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:43:03" (1/1) ... [2021-11-20 23:43:03,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47816722 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:03, skipping insertion in model container [2021-11-20 23:43:03,438 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:43:03" (1/1) ... [2021-11-20 23:43:03,447 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:43:03,514 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:43:03,916 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_d756e2db-09a1-4302-ab6a-2606b2cfe06e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c[16438,16451] [2021-11-20 23:43:04,029 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:43:04,071 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:43:04,322 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_d756e2db-09a1-4302-ab6a-2606b2cfe06e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c[16438,16451] [2021-11-20 23:43:04,477 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:43:04,492 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:43:04,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:04 WrapperNode [2021-11-20 23:43:04,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:43:04,494 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:43:04,494 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:43:04,495 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:43:04,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:04" (1/1) ... [2021-11-20 23:43:04,520 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:04" (1/1) ... [2021-11-20 23:43:04,580 INFO L137 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1408 [2021-11-20 23:43:04,580 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:43:04,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:43:04,581 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:43:04,581 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:43:04,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:04" (1/1) ... [2021-11-20 23:43:04,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:04" (1/1) ... [2021-11-20 23:43:04,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:04" (1/1) ... [2021-11-20 23:43:04,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:04" (1/1) ... [2021-11-20 23:43:04,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:04" (1/1) ... [2021-11-20 23:43:04,631 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:04" (1/1) ... [2021-11-20 23:43:04,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:04" (1/1) ... [2021-11-20 23:43:04,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:43:04,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:43:04,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:43:04,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:43:04,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:04" (1/1) ... [2021-11-20 23:43:04,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:43:04,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d756e2db-09a1-4302-ab6a-2606b2cfe06e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:43:04,690 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d756e2db-09a1-4302-ab6a-2606b2cfe06e/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:43:04,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d756e2db-09a1-4302-ab6a-2606b2cfe06e/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:43:04,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:43:04,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:43:04,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:43:04,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:43:04,946 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:43:04,948 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:43:06,018 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:43:06,606 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:43:06,607 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 23:43:06,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:43:06 BoogieIcfgContainer [2021-11-20 23:43:06,611 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:43:06,614 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:43:06,614 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:43:06,618 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:43:06,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:43:03" (1/3) ... [2021-11-20 23:43:06,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46665437 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:43:06, skipping insertion in model container [2021-11-20 23:43:06,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:04" (2/3) ... [2021-11-20 23:43:06,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46665437 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:43:06, skipping insertion in model container [2021-11-20 23:43:06,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:43:06" (3/3) ... [2021-11-20 23:43:06,623 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.BOUNDED-12.pals.c.p+lhb-reducer.c [2021-11-20 23:43:06,632 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:43:06,632 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:43:06,702 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:43:06,711 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 [2021-11-20 23:43:06,711 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:43:06,736 INFO L276 IsEmpty]: Start isEmpty. Operand has 222 states, 220 states have (on average 1.5318181818181817) internal successors, (337), 221 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:06,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-20 23:43:06,762 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:43:06,763 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] [2021-11-20 23:43:06,763 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:43:06,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:43:06,770 INFO L85 PathProgramCache]: Analyzing trace with hash -868004235, now seen corresponding path program 1 times [2021-11-20 23:43:06,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:43:06,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749758539] [2021-11-20 23:43:06,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:43:06,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:43:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:43:07,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:43:07,223 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:43:07,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749758539] [2021-11-20 23:43:07,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749758539] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:43:07,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:43:07,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:43:07,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038426566] [2021-11-20 23:43:07,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:43:07,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:43:07,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:43:07,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:43:07,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:43:07,274 INFO L87 Difference]: Start difference. First operand has 222 states, 220 states have (on average 1.5318181818181817) internal successors, (337), 221 states have internal predecessors, (337), 0 states have call successors, (0), 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 4 states, 4 states have (on average 21.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:07,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:43:07,645 INFO L93 Difference]: Finished difference Result 597 states and 902 transitions. [2021-11-20 23:43:07,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:43:07,648 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-11-20 23:43:07,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:43:07,671 INFO L225 Difference]: With dead ends: 597 [2021-11-20 23:43:07,671 INFO L226 Difference]: Without dead ends: 377 [2021-11-20 23:43:07,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:43:07,684 INFO L933 BasicCegarLoop]: 397 mSDtfsCounter, 526 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:43:07,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 644 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:43:07,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-11-20 23:43:07,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 375. [2021-11-20 23:43:07,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 1.4759358288770053) internal successors, (552), 374 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:07,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 552 transitions. [2021-11-20 23:43:07,793 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 552 transitions. Word has length 84 [2021-11-20 23:43:07,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:43:07,795 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 552 transitions. [2021-11-20 23:43:07,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:07,797 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 552 transitions. [2021-11-20 23:43:07,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 23:43:07,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:43:07,809 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:43:07,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:43:07,810 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:43:07,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:43:07,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1072116366, now seen corresponding path program 1 times [2021-11-20 23:43:07,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:43:07,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780825790] [2021-11-20 23:43:07,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:43:07,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:43:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:43:07,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:43:07,959 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:43:07,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780825790] [2021-11-20 23:43:07,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780825790] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:43:07,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:43:07,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:43:07,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957179555] [2021-11-20 23:43:07,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:43:07,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:43:07,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:43:07,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:43:07,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:43:07,963 INFO L87 Difference]: Start difference. First operand 375 states and 552 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:08,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:43:08,187 INFO L93 Difference]: Finished difference Result 1024 states and 1509 transitions. [2021-11-20 23:43:08,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:43:08,188 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-20 23:43:08,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:43:08,192 INFO L225 Difference]: With dead ends: 1024 [2021-11-20 23:43:08,193 INFO L226 Difference]: Without dead ends: 663 [2021-11-20 23:43:08,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:43:08,204 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 255 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:43:08,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 763 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:43:08,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-11-20 23:43:08,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 661. [2021-11-20 23:43:08,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 1.4666666666666666) internal successors, (968), 660 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:08,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 968 transitions. [2021-11-20 23:43:08,256 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 968 transitions. Word has length 93 [2021-11-20 23:43:08,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:43:08,260 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 968 transitions. [2021-11-20 23:43:08,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:08,261 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 968 transitions. [2021-11-20 23:43:08,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-20 23:43:08,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:43:08,265 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:43:08,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:43:08,265 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:43:08,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:43:08,272 INFO L85 PathProgramCache]: Analyzing trace with hash 837044729, now seen corresponding path program 1 times [2021-11-20 23:43:08,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:43:08,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77553173] [2021-11-20 23:43:08,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:43:08,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:43:08,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:43:08,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:43:08,396 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:43:08,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77553173] [2021-11-20 23:43:08,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77553173] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:43:08,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:43:08,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:43:08,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910557091] [2021-11-20 23:43:08,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:43:08,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:43:08,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:43:08,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:43:08,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:43:08,421 INFO L87 Difference]: Start difference. First operand 661 states and 968 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:08,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:43:08,661 INFO L93 Difference]: Finished difference Result 1828 states and 2678 transitions. [2021-11-20 23:43:08,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:43:08,662 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-11-20 23:43:08,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:43:08,669 INFO L225 Difference]: With dead ends: 1828 [2021-11-20 23:43:08,669 INFO L226 Difference]: Without dead ends: 1187 [2021-11-20 23:43:08,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:43:08,678 INFO L933 BasicCegarLoop]: 370 mSDtfsCounter, 253 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:43:08,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 833 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:43:08,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2021-11-20 23:43:08,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 1185. [2021-11-20 23:43:08,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 1184 states have (on average 1.4552364864864864) internal successors, (1723), 1184 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:08,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1723 transitions. [2021-11-20 23:43:08,751 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1723 transitions. Word has length 102 [2021-11-20 23:43:08,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:43:08,753 INFO L470 AbstractCegarLoop]: Abstraction has 1185 states and 1723 transitions. [2021-11-20 23:43:08,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:08,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1723 transitions. [2021-11-20 23:43:08,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-20 23:43:08,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:43:08,758 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] [2021-11-20 23:43:08,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:43:08,758 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:43:08,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:43:08,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1265129377, now seen corresponding path program 1 times [2021-11-20 23:43:08,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:43:08,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101166646] [2021-11-20 23:43:08,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:43:08,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:43:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:43:08,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:43:08,938 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:43:08,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101166646] [2021-11-20 23:43:08,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101166646] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:43:08,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:43:08,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:43:08,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597186890] [2021-11-20 23:43:08,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:43:08,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:43:08,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:43:08,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:43:08,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:43:08,941 INFO L87 Difference]: Start difference. First operand 1185 states and 1723 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:09,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:43:09,211 INFO L93 Difference]: Finished difference Result 3298 states and 4792 transitions. [2021-11-20 23:43:09,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:43:09,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2021-11-20 23:43:09,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:43:09,224 INFO L225 Difference]: With dead ends: 3298 [2021-11-20 23:43:09,224 INFO L226 Difference]: Without dead ends: 2139 [2021-11-20 23:43:09,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:43:09,232 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 490 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:43:09,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 503 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:43:09,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2021-11-20 23:43:09,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 2137. [2021-11-20 23:43:09,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2136 states have (on average 1.4410112359550562) internal successors, (3078), 2136 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:09,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 3078 transitions. [2021-11-20 23:43:09,383 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 3078 transitions. Word has length 111 [2021-11-20 23:43:09,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:43:09,383 INFO L470 AbstractCegarLoop]: Abstraction has 2137 states and 3078 transitions. [2021-11-20 23:43:09,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:09,383 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 3078 transitions. [2021-11-20 23:43:09,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-20 23:43:09,390 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:43:09,390 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] [2021-11-20 23:43:09,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:43:09,390 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:43:09,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:43:09,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1233763680, now seen corresponding path program 1 times [2021-11-20 23:43:09,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:43:09,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928072609] [2021-11-20 23:43:09,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:43:09,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:43:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:43:09,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:43:09,482 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:43:09,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928072609] [2021-11-20 23:43:09,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928072609] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:43:09,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:43:09,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:43:09,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007259572] [2021-11-20 23:43:09,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:43:09,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:43:09,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:43:09,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:43:09,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:43:09,484 INFO L87 Difference]: Start difference. First operand 2137 states and 3078 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:09,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:43:09,878 INFO L93 Difference]: Finished difference Result 5956 states and 8562 transitions. [2021-11-20 23:43:09,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:43:09,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2021-11-20 23:43:09,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:43:09,900 INFO L225 Difference]: With dead ends: 5956 [2021-11-20 23:43:09,900 INFO L226 Difference]: Without dead ends: 3851 [2021-11-20 23:43:09,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:43:09,907 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 483 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:43:09,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 495 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:43:09,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3851 states. [2021-11-20 23:43:10,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3851 to 3849. [2021-11-20 23:43:10,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3849 states, 3848 states have (on average 1.4233367983367984) internal successors, (5477), 3848 states have internal predecessors, (5477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:10,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3849 states to 3849 states and 5477 transitions. [2021-11-20 23:43:10,227 INFO L78 Accepts]: Start accepts. Automaton has 3849 states and 5477 transitions. Word has length 120 [2021-11-20 23:43:10,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:43:10,228 INFO L470 AbstractCegarLoop]: Abstraction has 3849 states and 5477 transitions. [2021-11-20 23:43:10,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:10,228 INFO L276 IsEmpty]: Start isEmpty. Operand 3849 states and 5477 transitions. [2021-11-20 23:43:10,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-20 23:43:10,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:43:10,240 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] [2021-11-20 23:43:10,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:43:10,240 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:43:10,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:43:10,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1306075299, now seen corresponding path program 1 times [2021-11-20 23:43:10,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:43:10,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177764840] [2021-11-20 23:43:10,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:43:10,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:43:10,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:43:10,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:43:10,319 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:43:10,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177764840] [2021-11-20 23:43:10,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177764840] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:43:10,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:43:10,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:43:10,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594702542] [2021-11-20 23:43:10,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:43:10,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:43:10,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:43:10,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:43:10,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:43:10,322 INFO L87 Difference]: Start difference. First operand 3849 states and 5477 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:10,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:43:10,844 INFO L93 Difference]: Finished difference Result 10702 states and 15176 transitions. [2021-11-20 23:43:10,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:43:10,845 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2021-11-20 23:43:10,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:43:10,888 INFO L225 Difference]: With dead ends: 10702 [2021-11-20 23:43:10,888 INFO L226 Difference]: Without dead ends: 6891 [2021-11-20 23:43:10,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:43:10,897 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 476 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:43:10,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [476 Valid, 487 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:43:10,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6891 states. [2021-11-20 23:43:11,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6891 to 6889. [2021-11-20 23:43:11,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6889 states, 6888 states have (on average 1.4012775842044134) internal successors, (9652), 6888 states have internal predecessors, (9652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:11,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6889 states to 6889 states and 9652 transitions. [2021-11-20 23:43:11,474 INFO L78 Accepts]: Start accepts. Automaton has 6889 states and 9652 transitions. Word has length 129 [2021-11-20 23:43:11,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:43:11,474 INFO L470 AbstractCegarLoop]: Abstraction has 6889 states and 9652 transitions. [2021-11-20 23:43:11,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:11,475 INFO L276 IsEmpty]: Start isEmpty. Operand 6889 states and 9652 transitions. [2021-11-20 23:43:11,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-20 23:43:11,494 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:43:11,494 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] [2021-11-20 23:43:11,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 23:43:11,496 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:43:11,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:43:11,496 INFO L85 PathProgramCache]: Analyzing trace with hash 178318289, now seen corresponding path program 1 times [2021-11-20 23:43:11,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:43:11,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900354717] [2021-11-20 23:43:11,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:43:11,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:43:11,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:43:11,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:43:11,635 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:43:11,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900354717] [2021-11-20 23:43:11,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900354717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:43:11,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:43:11,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:43:11,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600218572] [2021-11-20 23:43:11,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:43:11,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:43:11,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:43:11,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:43:11,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:43:11,637 INFO L87 Difference]: Start difference. First operand 6889 states and 9652 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:12,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:43:12,464 INFO L93 Difference]: Finished difference Result 16088 states and 22237 transitions. [2021-11-20 23:43:12,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:43:12,465 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-11-20 23:43:12,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:43:12,517 INFO L225 Difference]: With dead ends: 16088 [2021-11-20 23:43:12,517 INFO L226 Difference]: Without dead ends: 9242 [2021-11-20 23:43:12,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:43:12,531 INFO L933 BasicCegarLoop]: 491 mSDtfsCounter, 537 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:43:12,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 691 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:43:12,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9242 states. [2021-11-20 23:43:13,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9242 to 9240. [2021-11-20 23:43:13,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9240 states, 9239 states have (on average 1.3677887217231302) internal successors, (12637), 9239 states have internal predecessors, (12637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:13,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9240 states to 9240 states and 12637 transitions. [2021-11-20 23:43:13,260 INFO L78 Accepts]: Start accepts. Automaton has 9240 states and 12637 transitions. Word has length 138 [2021-11-20 23:43:13,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:43:13,262 INFO L470 AbstractCegarLoop]: Abstraction has 9240 states and 12637 transitions. [2021-11-20 23:43:13,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:13,263 INFO L276 IsEmpty]: Start isEmpty. Operand 9240 states and 12637 transitions. [2021-11-20 23:43:13,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-20 23:43:13,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:43:13,288 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:43:13,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 23:43:13,288 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:43:13,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:43:13,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1083135730, now seen corresponding path program 1 times [2021-11-20 23:43:13,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:43:13,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46587644] [2021-11-20 23:43:13,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:43:13,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:43:13,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:43:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:43:13,384 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:43:13,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46587644] [2021-11-20 23:43:13,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46587644] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:43:13,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:43:13,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:43:13,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260669962] [2021-11-20 23:43:13,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:43:13,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:43:13,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:43:13,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:43:13,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:43:13,386 INFO L87 Difference]: Start difference. First operand 9240 states and 12637 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:14,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:43:14,370 INFO L93 Difference]: Finished difference Result 23031 states and 31676 transitions. [2021-11-20 23:43:14,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:43:14,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-11-20 23:43:14,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:43:14,425 INFO L225 Difference]: With dead ends: 23031 [2021-11-20 23:43:14,425 INFO L226 Difference]: Without dead ends: 13833 [2021-11-20 23:43:14,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:43:14,442 INFO L933 BasicCegarLoop]: 500 mSDtfsCounter, 582 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:43:14,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 708 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:43:14,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13833 states. [2021-11-20 23:43:15,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13833 to 13831. [2021-11-20 23:43:15,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13831 states, 13830 states have (on average 1.3710773680404917) internal successors, (18962), 13830 states have internal predecessors, (18962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:15,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13831 states to 13831 states and 18962 transitions. [2021-11-20 23:43:15,443 INFO L78 Accepts]: Start accepts. Automaton has 13831 states and 18962 transitions. Word has length 140 [2021-11-20 23:43:15,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:43:15,444 INFO L470 AbstractCegarLoop]: Abstraction has 13831 states and 18962 transitions. [2021-11-20 23:43:15,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:15,445 INFO L276 IsEmpty]: Start isEmpty. Operand 13831 states and 18962 transitions. [2021-11-20 23:43:15,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-20 23:43:15,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:43:15,475 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] [2021-11-20 23:43:15,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 23:43:15,476 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:43:15,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:43:15,476 INFO L85 PathProgramCache]: Analyzing trace with hash 2064688460, now seen corresponding path program 1 times [2021-11-20 23:43:15,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:43:15,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750354949] [2021-11-20 23:43:15,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:43:15,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:43:15,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:43:15,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:43:15,581 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:43:15,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750354949] [2021-11-20 23:43:15,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750354949] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:43:15,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:43:15,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:43:15,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935295109] [2021-11-20 23:43:15,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:43:15,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:43:15,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:43:15,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:43:15,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:43:15,584 INFO L87 Difference]: Start difference. First operand 13831 states and 18962 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:16,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:43:16,659 INFO L93 Difference]: Finished difference Result 27621 states and 37869 transitions. [2021-11-20 23:43:16,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:43:16,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-11-20 23:43:16,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:43:16,693 INFO L225 Difference]: With dead ends: 27621 [2021-11-20 23:43:16,694 INFO L226 Difference]: Without dead ends: 13833 [2021-11-20 23:43:16,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:43:16,717 INFO L933 BasicCegarLoop]: 489 mSDtfsCounter, 521 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:43:16,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 689 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:43:16,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13833 states. [2021-11-20 23:43:17,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13833 to 13831. [2021-11-20 23:43:17,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13831 states, 13830 states have (on average 1.3704989154013014) internal successors, (18954), 13830 states have internal predecessors, (18954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:17,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13831 states to 13831 states and 18954 transitions. [2021-11-20 23:43:17,636 INFO L78 Accepts]: Start accepts. Automaton has 13831 states and 18954 transitions. Word has length 140 [2021-11-20 23:43:17,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:43:17,637 INFO L470 AbstractCegarLoop]: Abstraction has 13831 states and 18954 transitions. [2021-11-20 23:43:17,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:17,637 INFO L276 IsEmpty]: Start isEmpty. Operand 13831 states and 18954 transitions. [2021-11-20 23:43:17,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-20 23:43:17,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:43:17,668 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] [2021-11-20 23:43:17,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 23:43:17,668 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:43:17,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:43:17,669 INFO L85 PathProgramCache]: Analyzing trace with hash -567330799, now seen corresponding path program 1 times [2021-11-20 23:43:17,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:43:17,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902415834] [2021-11-20 23:43:17,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:43:17,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:43:17,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:43:17,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:43:17,746 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:43:17,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902415834] [2021-11-20 23:43:17,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902415834] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:43:17,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:43:17,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:43:17,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093485740] [2021-11-20 23:43:17,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:43:17,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:43:17,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:43:17,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:43:17,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:43:17,749 INFO L87 Difference]: Start difference. First operand 13831 states and 18954 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:19,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:43:19,391 INFO L93 Difference]: Finished difference Result 39404 states and 53898 transitions. [2021-11-20 23:43:19,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:43:19,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-20 23:43:19,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:43:19,473 INFO L225 Difference]: With dead ends: 39404 [2021-11-20 23:43:19,473 INFO L226 Difference]: Without dead ends: 27460 [2021-11-20 23:43:19,502 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 [2021-11-20 23:43:19,503 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 240 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:43:19,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 293 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:43:19,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27460 states. [2021-11-20 23:43:20,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27460 to 27458. [2021-11-20 23:43:20,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27458 states, 27457 states have (on average 1.3603452671449903) internal successors, (37351), 27457 states have internal predecessors, (37351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:21,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27458 states to 27458 states and 37351 transitions. [2021-11-20 23:43:21,223 INFO L78 Accepts]: Start accepts. Automaton has 27458 states and 37351 transitions. Word has length 141 [2021-11-20 23:43:21,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:43:21,224 INFO L470 AbstractCegarLoop]: Abstraction has 27458 states and 37351 transitions. [2021-11-20 23:43:21,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:21,224 INFO L276 IsEmpty]: Start isEmpty. Operand 27458 states and 37351 transitions. [2021-11-20 23:43:21,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-20 23:43:21,280 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:43:21,280 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] [2021-11-20 23:43:21,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 23:43:21,281 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:43:21,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:43:21,282 INFO L85 PathProgramCache]: Analyzing trace with hash 686481307, now seen corresponding path program 1 times [2021-11-20 23:43:21,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:43:21,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21081022] [2021-11-20 23:43:21,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:43:21,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:43:21,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:43:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:43:21,364 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:43:21,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21081022] [2021-11-20 23:43:21,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21081022] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:43:21,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:43:21,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:43:21,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180000678] [2021-11-20 23:43:21,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:43:21,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:43:21,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:43:21,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:43:21,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:43:21,367 INFO L87 Difference]: Start difference. First operand 27458 states and 37351 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:23,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:43:23,325 INFO L93 Difference]: Finished difference Result 65080 states and 88581 transitions. [2021-11-20 23:43:23,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:43:23,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-20 23:43:23,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:43:23,432 INFO L225 Difference]: With dead ends: 65080 [2021-11-20 23:43:23,433 INFO L226 Difference]: Without dead ends: 41796 [2021-11-20 23:43:23,473 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 [2021-11-20 23:43:23,474 INFO L933 BasicCegarLoop]: 342 mSDtfsCounter, 219 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:43:23,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 472 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:43:23,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41796 states. [2021-11-20 23:43:25,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41796 to 41794. [2021-11-20 23:43:25,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41794 states, 41793 states have (on average 1.3523556576460172) internal successors, (56519), 41793 states have internal predecessors, (56519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:25,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41794 states to 41794 states and 56519 transitions. [2021-11-20 23:43:25,811 INFO L78 Accepts]: Start accepts. Automaton has 41794 states and 56519 transitions. Word has length 141 [2021-11-20 23:43:25,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:43:25,812 INFO L470 AbstractCegarLoop]: Abstraction has 41794 states and 56519 transitions. [2021-11-20 23:43:25,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:25,812 INFO L276 IsEmpty]: Start isEmpty. Operand 41794 states and 56519 transitions. [2021-11-20 23:43:25,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-20 23:43:25,874 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:43:25,874 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] [2021-11-20 23:43:25,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 23:43:25,874 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:43:25,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:43:25,875 INFO L85 PathProgramCache]: Analyzing trace with hash 30799072, now seen corresponding path program 1 times [2021-11-20 23:43:25,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:43:25,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515482468] [2021-11-20 23:43:25,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:43:25,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:43:25,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:43:26,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:43:26,026 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:43:26,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515482468] [2021-11-20 23:43:26,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515482468] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:43:26,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:43:26,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:43:26,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722316342] [2021-11-20 23:43:26,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:43:26,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:43:26,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:43:26,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:43:26,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:43:26,028 INFO L87 Difference]: Start difference. First operand 41794 states and 56519 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:29,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:43:29,180 INFO L93 Difference]: Finished difference Result 103744 states and 140773 transitions. [2021-11-20 23:43:29,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:43:29,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-20 23:43:29,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:43:29,294 INFO L225 Difference]: With dead ends: 103744 [2021-11-20 23:43:29,295 INFO L226 Difference]: Without dead ends: 61962 [2021-11-20 23:43:29,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:43:29,341 INFO L933 BasicCegarLoop]: 345 mSDtfsCounter, 603 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:43:29,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 442 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:43:29,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61962 states. [2021-11-20 23:43:32,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61962 to 61960. [2021-11-20 23:43:32,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61960 states, 61959 states have (on average 1.3483755386626641) internal successors, (83544), 61959 states have internal predecessors, (83544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:32,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61960 states to 61960 states and 83544 transitions. [2021-11-20 23:43:32,541 INFO L78 Accepts]: Start accepts. Automaton has 61960 states and 83544 transitions. Word has length 141 [2021-11-20 23:43:32,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:43:32,542 INFO L470 AbstractCegarLoop]: Abstraction has 61960 states and 83544 transitions. [2021-11-20 23:43:32,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:32,542 INFO L276 IsEmpty]: Start isEmpty. Operand 61960 states and 83544 transitions. [2021-11-20 23:43:32,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-20 23:43:32,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:43:32,635 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] [2021-11-20 23:43:32,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 23:43:32,636 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:43:32,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:43:32,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1463947498, now seen corresponding path program 1 times [2021-11-20 23:43:32,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:43:32,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239584089] [2021-11-20 23:43:32,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:43:32,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:43:32,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:43:32,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:43:32,758 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:43:32,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239584089] [2021-11-20 23:43:32,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239584089] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:43:32,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:43:32,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:43:32,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378420765] [2021-11-20 23:43:32,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:43:32,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:43:32,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:43:32,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:43:32,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:43:32,761 INFO L87 Difference]: Start difference. First operand 61960 states and 83544 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:36,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:43:36,941 INFO L93 Difference]: Finished difference Result 150988 states and 204060 transitions. [2021-11-20 23:43:36,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:43:36,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-20 23:43:36,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:43:37,124 INFO L225 Difference]: With dead ends: 150988 [2021-11-20 23:43:37,125 INFO L226 Difference]: Without dead ends: 89052 [2021-11-20 23:43:37,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:43:37,194 INFO L933 BasicCegarLoop]: 329 mSDtfsCounter, 303 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:43:37,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 515 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 23:43:37,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89052 states. [2021-11-20 23:43:41,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89052 to 89050. [2021-11-20 23:43:41,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89050 states, 89049 states have (on average 1.3444395782097498) internal successors, (119721), 89049 states have internal predecessors, (119721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:41,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89050 states to 89050 states and 119721 transitions. [2021-11-20 23:43:41,596 INFO L78 Accepts]: Start accepts. Automaton has 89050 states and 119721 transitions. Word has length 141 [2021-11-20 23:43:41,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:43:41,596 INFO L470 AbstractCegarLoop]: Abstraction has 89050 states and 119721 transitions. [2021-11-20 23:43:41,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:41,597 INFO L276 IsEmpty]: Start isEmpty. Operand 89050 states and 119721 transitions. [2021-11-20 23:43:41,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-20 23:43:41,699 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:43:41,700 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] [2021-11-20 23:43:41,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 23:43:41,700 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:43:41,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:43:41,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1286680970, now seen corresponding path program 1 times [2021-11-20 23:43:41,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:43:41,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752621614] [2021-11-20 23:43:41,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:43:41,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:43:41,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:43:41,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:43:41,813 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:43:41,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752621614] [2021-11-20 23:43:41,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752621614] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:43:41,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:43:41,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:43:41,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963732176] [2021-11-20 23:43:41,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:43:41,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:43:41,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:43:41,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:43:41,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:43:41,815 INFO L87 Difference]: Start difference. First operand 89050 states and 119721 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:46,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:43:46,344 INFO L93 Difference]: Finished difference Result 178096 states and 239435 transitions. [2021-11-20 23:43:46,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:43:46,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-20 23:43:46,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:43:46,480 INFO L225 Difference]: With dead ends: 178096 [2021-11-20 23:43:46,480 INFO L226 Difference]: Without dead ends: 89052 [2021-11-20 23:43:46,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:43:46,551 INFO L933 BasicCegarLoop]: 347 mSDtfsCounter, 297 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:43:46,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 551 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:43:46,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89052 states. [2021-11-20 23:43:50,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89052 to 89050. [2021-11-20 23:43:50,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89050 states, 89049 states have (on average 1.3325697088120023) internal successors, (118664), 89049 states have internal predecessors, (118664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:51,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89050 states to 89050 states and 118664 transitions. [2021-11-20 23:43:51,077 INFO L78 Accepts]: Start accepts. Automaton has 89050 states and 118664 transitions. Word has length 141 [2021-11-20 23:43:51,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:43:51,078 INFO L470 AbstractCegarLoop]: Abstraction has 89050 states and 118664 transitions. [2021-11-20 23:43:51,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:43:51,078 INFO L276 IsEmpty]: Start isEmpty. Operand 89050 states and 118664 transitions. [2021-11-20 23:43:51,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-20 23:43:51,201 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:43:51,201 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] [2021-11-20 23:43:51,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 23:43:51,202 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:43:51,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:43:51,202 INFO L85 PathProgramCache]: Analyzing trace with hash -350048443, now seen corresponding path program 1 times [2021-11-20 23:43:51,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:43:51,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310010255] [2021-11-20 23:43:51,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:43:51,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:43:51,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:43:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:43:51,312 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:43:51,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310010255] [2021-11-20 23:43:51,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310010255] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:43:51,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:43:51,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:43:51,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127377542] [2021-11-20 23:43:51,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:43:51,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:43:51,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:43:51,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:43:51,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:43:51,315 INFO L87 Difference]: Start difference. First operand 89050 states and 118664 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)