./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label09.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label09.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8852f5d85d99e238ddb4939d2a61f2cf9e42dc8f549b5b69b60dfda9c1201f88 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 12:02:42,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 12:02:42,095 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 12:02:42,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 12:02:42,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 12:02:42,138 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 12:02:42,141 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 12:02:42,146 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 12:02:42,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 12:02:42,151 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 12:02:42,152 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 12:02:42,153 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 12:02:42,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 12:02:42,155 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 12:02:42,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 12:02:42,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 12:02:42,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 12:02:42,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 12:02:42,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 12:02:42,170 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 12:02:42,171 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 12:02:42,171 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 12:02:42,173 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 12:02:42,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 12:02:42,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 12:02:42,175 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 12:02:42,175 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 12:02:42,177 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 12:02:42,177 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 12:02:42,177 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 12:02:42,178 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 12:02:42,179 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 12:02:42,180 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 12:02:42,181 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 12:02:42,181 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 12:02:42,182 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 12:02:42,182 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 12:02:42,182 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 12:02:42,183 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 12:02:42,184 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 12:02:42,185 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 12:02:42,185 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 12:02:42,216 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 12:02:42,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 12:02:42,216 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 12:02:42,217 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 12:02:42,217 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 12:02:42,218 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 12:02:42,218 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 12:02:42,218 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 12:02:42,218 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 12:02:42,219 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 12:02:42,219 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 12:02:42,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 12:02:42,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 12:02:42,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 12:02:42,220 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 12:02:42,220 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 12:02:42,220 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 12:02:42,220 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 12:02:42,220 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 12:02:42,221 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 12:02:42,221 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 12:02:42,221 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 12:02:42,221 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 12:02:42,221 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 12:02:42,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:02:42,222 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 12:02:42,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 12:02:42,222 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 12:02:42,222 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 12:02:42,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 12:02:42,222 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 12:02:42,222 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 12:02:42,223 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 12:02:42,223 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 12:02:42,223 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8852f5d85d99e238ddb4939d2a61f2cf9e42dc8f549b5b69b60dfda9c1201f88 [2021-12-15 12:02:42,450 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 12:02:42,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 12:02:42,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 12:02:42,483 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 12:02:42,484 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 12:02:42,485 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label09.c [2021-12-15 12:02:42,541 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f4f983ca/8d4a7878a1494c8b8f919683306d53e0/FLAG675c117c4 [2021-12-15 12:02:43,184 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 12:02:43,185 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label09.c [2021-12-15 12:02:43,212 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f4f983ca/8d4a7878a1494c8b8f919683306d53e0/FLAG675c117c4 [2021-12-15 12:02:43,572 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f4f983ca/8d4a7878a1494c8b8f919683306d53e0 [2021-12-15 12:02:43,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 12:02:43,575 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 12:02:43,581 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 12:02:43,581 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 12:02:43,583 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 12:02:43,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:02:43" (1/1) ... [2021-12-15 12:02:43,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@261253c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:02:43, skipping insertion in model container [2021-12-15 12:02:43,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 12:02:43" (1/1) ... [2021-12-15 12:02:43,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 12:02:43,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 12:02:44,023 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label09.c[8749,8762] [2021-12-15 12:02:44,086 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label09.c[16497,16510] [2021-12-15 12:02:44,621 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:02:44,633 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 12:02:44,671 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label09.c[8749,8762] [2021-12-15 12:02:44,679 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label09.c[16497,16510] [2021-12-15 12:02:44,994 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 12:02:45,014 INFO L208 MainTranslator]: Completed translation [2021-12-15 12:02:45,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:02:45 WrapperNode [2021-12-15 12:02:45,015 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 12:02:45,016 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 12:02:45,016 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 12:02:45,016 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 12:02:45,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:02:45" (1/1) ... [2021-12-15 12:02:45,092 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:02:45" (1/1) ... [2021-12-15 12:02:45,447 INFO L137 Inliner]: procedures = 36, calls = 21, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 5032 [2021-12-15 12:02:45,447 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 12:02:45,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 12:02:45,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 12:02:45,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 12:02:45,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:02:45" (1/1) ... [2021-12-15 12:02:45,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:02:45" (1/1) ... [2021-12-15 12:02:45,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:02:45" (1/1) ... [2021-12-15 12:02:45,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:02:45" (1/1) ... [2021-12-15 12:02:45,666 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:02:45" (1/1) ... [2021-12-15 12:02:45,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:02:45" (1/1) ... [2021-12-15 12:02:45,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:02:45" (1/1) ... [2021-12-15 12:02:45,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 12:02:45,836 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 12:02:45,836 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 12:02:45,836 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 12:02:45,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:02:45" (1/1) ... [2021-12-15 12:02:45,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 12:02:45,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:02:45,899 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 12:02:45,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 12:02:45,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 12:02:45,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 12:02:45,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 12:02:45,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 12:02:46,064 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 12:02:46,065 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 12:02:48,688 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 12:02:48,708 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 12:02:48,708 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 12:02:48,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:02:48 BoogieIcfgContainer [2021-12-15 12:02:48,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 12:02:48,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 12:02:48,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 12:02:48,716 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 12:02:48,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 12:02:43" (1/3) ... [2021-12-15 12:02:48,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@340855df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:02:48, skipping insertion in model container [2021-12-15 12:02:48,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 12:02:45" (2/3) ... [2021-12-15 12:02:48,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@340855df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 12:02:48, skipping insertion in model container [2021-12-15 12:02:48,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 12:02:48" (3/3) ... [2021-12-15 12:02:48,719 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.UNBOUNDED.pals+Problem12_label09.c [2021-12-15 12:02:48,725 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 12:02:48,726 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-15 12:02:48,772 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 12:02:48,778 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=PETRI_NET, 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 [2021-12-15 12:02:48,778 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-15 12:02:48,802 INFO L276 IsEmpty]: Start isEmpty. Operand has 895 states, 892 states have (on average 1.9013452914798206) internal successors, (1696), 894 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:48,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-15 12:02:48,807 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:48,808 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] [2021-12-15 12:02:48,808 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:48,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:48,812 INFO L85 PathProgramCache]: Analyzing trace with hash 2085104645, now seen corresponding path program 1 times [2021-12-15 12:02:48,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:48,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055836251] [2021-12-15 12:02:48,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:48,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:48,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:48,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:48,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:48,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055836251] [2021-12-15 12:02:48,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055836251] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:48,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:48,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 12:02:48,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205027600] [2021-12-15 12:02:48,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:48,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 12:02:48,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:49,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 12:02:49,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 12:02:49,016 INFO L87 Difference]: Start difference. First operand has 895 states, 892 states have (on average 1.9013452914798206) internal successors, (1696), 894 states have internal predecessors, (1696), 0 states have call successors, (0), 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 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:49,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:49,070 INFO L93 Difference]: Finished difference Result 1759 states and 3336 transitions. [2021-12-15 12:02:49,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 12:02:49,072 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-12-15 12:02:49,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:49,086 INFO L225 Difference]: With dead ends: 1759 [2021-12-15 12:02:49,095 INFO L226 Difference]: Without dead ends: 829 [2021-12-15 12:02:49,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 12:02:49,110 INFO L933 BasicCegarLoop]: 1627 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1627 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:49,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1627 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:49,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-12-15 12:02:49,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 829. [2021-12-15 12:02:49,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 827 states have (on average 1.8899637243047158) internal successors, (1563), 828 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:49,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1563 transitions. [2021-12-15 12:02:49,195 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1563 transitions. Word has length 30 [2021-12-15 12:02:49,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:49,196 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 1563 transitions. [2021-12-15 12:02:49,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:49,197 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1563 transitions. [2021-12-15 12:02:49,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-15 12:02:49,198 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:49,198 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] [2021-12-15 12:02:49,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 12:02:49,199 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:49,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:49,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1951091139, now seen corresponding path program 1 times [2021-12-15 12:02:49,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:49,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028044251] [2021-12-15 12:02:49,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:49,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:49,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:49,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:49,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:49,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028044251] [2021-12-15 12:02:49,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028044251] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:49,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:49,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 12:02:49,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533322030] [2021-12-15 12:02:49,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:49,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 12:02:49,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:49,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 12:02:49,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 12:02:49,326 INFO L87 Difference]: Start difference. First operand 829 states and 1563 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:49,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:49,421 INFO L93 Difference]: Finished difference Result 879 states and 1639 transitions. [2021-12-15 12:02:49,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 12:02:49,422 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-12-15 12:02:49,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:49,427 INFO L225 Difference]: With dead ends: 879 [2021-12-15 12:02:49,428 INFO L226 Difference]: Without dead ends: 829 [2021-12-15 12:02:49,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 12:02:49,429 INFO L933 BasicCegarLoop]: 1561 mSDtfsCounter, 3 mSDsluCounter, 4657 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6218 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:49,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6218 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:49,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-12-15 12:02:49,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 829. [2021-12-15 12:02:49,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 827 states have (on average 1.8621523579201935) internal successors, (1540), 828 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:49,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1540 transitions. [2021-12-15 12:02:49,443 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1540 transitions. Word has length 30 [2021-12-15 12:02:49,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:49,443 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 1540 transitions. [2021-12-15 12:02:49,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:49,444 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1540 transitions. [2021-12-15 12:02:49,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-15 12:02:49,445 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:49,445 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] [2021-12-15 12:02:49,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 12:02:49,446 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:49,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:49,446 INFO L85 PathProgramCache]: Analyzing trace with hash 568524862, now seen corresponding path program 1 times [2021-12-15 12:02:49,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:49,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559403966] [2021-12-15 12:02:49,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:49,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:49,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:49,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:49,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559403966] [2021-12-15 12:02:49,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559403966] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:49,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:49,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 12:02:49,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104136376] [2021-12-15 12:02:49,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:49,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 12:02:49,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:49,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 12:02:49,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-15 12:02:49,553 INFO L87 Difference]: Start difference. First operand 829 states and 1540 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:49,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:49,675 INFO L93 Difference]: Finished difference Result 1197 states and 2116 transitions. [2021-12-15 12:02:49,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 12:02:49,676 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-12-15 12:02:49,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:49,681 INFO L225 Difference]: With dead ends: 1197 [2021-12-15 12:02:49,682 INFO L226 Difference]: Without dead ends: 1151 [2021-12-15 12:02:49,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-15 12:02:49,687 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 6574 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6574 SdHoareTripleChecker+Valid, 2078 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:49,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6574 Valid, 2078 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 12:02:49,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2021-12-15 12:02:49,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 873. [2021-12-15 12:02:49,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 871 states have (on average 1.8473019517795637) internal successors, (1609), 872 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:49,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1609 transitions. [2021-12-15 12:02:49,713 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1609 transitions. Word has length 52 [2021-12-15 12:02:49,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:49,713 INFO L470 AbstractCegarLoop]: Abstraction has 873 states and 1609 transitions. [2021-12-15 12:02:49,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:49,714 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1609 transitions. [2021-12-15 12:02:49,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-15 12:02:49,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:49,719 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] [2021-12-15 12:02:49,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 12:02:49,719 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:49,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:49,720 INFO L85 PathProgramCache]: Analyzing trace with hash -524152242, now seen corresponding path program 1 times [2021-12-15 12:02:49,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:49,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264936393] [2021-12-15 12:02:49,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:49,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:49,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:49,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:49,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:49,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264936393] [2021-12-15 12:02:49,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264936393] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:49,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:49,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:02:49,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61995602] [2021-12-15 12:02:49,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:49,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:02:49,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:49,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:02:49,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:02:49,827 INFO L87 Difference]: Start difference. First operand 873 states and 1609 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:49,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:49,868 INFO L93 Difference]: Finished difference Result 1042 states and 1872 transitions. [2021-12-15 12:02:49,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:02:49,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-12-15 12:02:49,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:49,873 INFO L225 Difference]: With dead ends: 1042 [2021-12-15 12:02:49,874 INFO L226 Difference]: Without dead ends: 952 [2021-12-15 12:02:49,874 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 [2021-12-15 12:02:49,885 INFO L933 BasicCegarLoop]: 1536 mSDtfsCounter, 1480 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 1601 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:49,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1480 Valid, 1601 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:49,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-12-15 12:02:49,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 948. [2021-12-15 12:02:49,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 946 states have (on average 1.8213530655391121) internal successors, (1723), 947 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) [2021-12-15 12:02:49,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1723 transitions. [2021-12-15 12:02:49,908 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1723 transitions. Word has length 54 [2021-12-15 12:02:49,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:49,908 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 1723 transitions. [2021-12-15 12:02:49,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:49,909 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1723 transitions. [2021-12-15 12:02:49,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-15 12:02:49,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:49,910 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] [2021-12-15 12:02:49,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 12:02:49,910 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:49,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:49,911 INFO L85 PathProgramCache]: Analyzing trace with hash -457658730, now seen corresponding path program 1 times [2021-12-15 12:02:49,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:49,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512443391] [2021-12-15 12:02:49,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:49,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:49,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:50,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:50,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:50,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512443391] [2021-12-15 12:02:50,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512443391] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:50,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:50,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 12:02:50,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215208078] [2021-12-15 12:02:50,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:50,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 12:02:50,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:50,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 12:02:50,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 12:02:50,076 INFO L87 Difference]: Start difference. First operand 948 states and 1723 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:50,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:50,221 INFO L93 Difference]: Finished difference Result 1115 states and 1979 transitions. [2021-12-15 12:02:50,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 12:02:50,221 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-12-15 12:02:50,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:50,226 INFO L225 Difference]: With dead ends: 1115 [2021-12-15 12:02:50,226 INFO L226 Difference]: Without dead ends: 950 [2021-12-15 12:02:50,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:02:50,228 INFO L933 BasicCegarLoop]: 1540 mSDtfsCounter, 6048 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6048 SdHoareTripleChecker+Valid, 1744 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:50,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6048 Valid, 1744 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:50,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-12-15 12:02:50,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 948. [2021-12-15 12:02:50,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 946 states have (on average 1.8192389006342495) internal successors, (1721), 947 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:50,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1721 transitions. [2021-12-15 12:02:50,255 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1721 transitions. Word has length 54 [2021-12-15 12:02:50,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:50,256 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 1721 transitions. [2021-12-15 12:02:50,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:50,256 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1721 transitions. [2021-12-15 12:02:50,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-15 12:02:50,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:50,257 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] [2021-12-15 12:02:50,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 12:02:50,258 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:50,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:50,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1331255346, now seen corresponding path program 1 times [2021-12-15 12:02:50,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:50,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860219548] [2021-12-15 12:02:50,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:50,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:50,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:50,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:50,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:50,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860219548] [2021-12-15 12:02:50,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860219548] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:50,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:50,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:02:50,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97471043] [2021-12-15 12:02:50,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:50,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:02:50,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:50,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:02:50,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:02:50,306 INFO L87 Difference]: Start difference. First operand 948 states and 1721 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:50,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:50,335 INFO L93 Difference]: Finished difference Result 1254 states and 2187 transitions. [2021-12-15 12:02:50,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:02:50,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-12-15 12:02:50,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:50,341 INFO L225 Difference]: With dead ends: 1254 [2021-12-15 12:02:50,342 INFO L226 Difference]: Without dead ends: 1089 [2021-12-15 12:02:50,343 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 [2021-12-15 12:02:50,343 INFO L933 BasicCegarLoop]: 1557 mSDtfsCounter, 1489 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1489 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:50,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1489 Valid, 1639 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:50,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-12-15 12:02:50,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 1087. [2021-12-15 12:02:50,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1085 states have (on average 1.7778801843317973) internal successors, (1929), 1086 states have internal predecessors, (1929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:50,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1929 transitions. [2021-12-15 12:02:50,399 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1929 transitions. Word has length 54 [2021-12-15 12:02:50,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:50,399 INFO L470 AbstractCegarLoop]: Abstraction has 1087 states and 1929 transitions. [2021-12-15 12:02:50,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:50,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1929 transitions. [2021-12-15 12:02:50,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-15 12:02:50,401 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:50,401 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] [2021-12-15 12:02:50,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 12:02:50,402 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:50,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:50,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1716204334, now seen corresponding path program 1 times [2021-12-15 12:02:50,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:50,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279308790] [2021-12-15 12:02:50,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:50,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:50,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:50,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:50,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:50,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279308790] [2021-12-15 12:02:50,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279308790] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:50,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:50,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:02:50,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328629584] [2021-12-15 12:02:50,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:50,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:02:50,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:50,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:02:50,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:02:50,469 INFO L87 Difference]: Start difference. First operand 1087 states and 1929 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:50,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:50,512 INFO L93 Difference]: Finished difference Result 1647 states and 2771 transitions. [2021-12-15 12:02:50,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:02:50,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-12-15 12:02:50,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:50,519 INFO L225 Difference]: With dead ends: 1647 [2021-12-15 12:02:50,519 INFO L226 Difference]: Without dead ends: 1343 [2021-12-15 12:02:50,520 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 [2021-12-15 12:02:50,521 INFO L933 BasicCegarLoop]: 1570 mSDtfsCounter, 1493 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1493 SdHoareTripleChecker+Valid, 1648 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:50,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1493 Valid, 1648 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:50,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2021-12-15 12:02:50,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1341. [2021-12-15 12:02:50,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1339 states have (on average 1.7184466019417475) internal successors, (2301), 1340 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:50,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 2301 transitions. [2021-12-15 12:02:50,560 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 2301 transitions. Word has length 54 [2021-12-15 12:02:50,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:50,561 INFO L470 AbstractCegarLoop]: Abstraction has 1341 states and 2301 transitions. [2021-12-15 12:02:50,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:50,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 2301 transitions. [2021-12-15 12:02:50,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-15 12:02:50,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:50,562 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] [2021-12-15 12:02:50,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 12:02:50,563 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:50,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:50,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1442516622, now seen corresponding path program 1 times [2021-12-15 12:02:50,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:50,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790880014] [2021-12-15 12:02:50,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:50,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:50,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:50,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:50,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790880014] [2021-12-15 12:02:50,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790880014] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:50,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:50,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:02:50,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697490059] [2021-12-15 12:02:50,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:50,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:02:50,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:50,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:02:50,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:02:50,599 INFO L87 Difference]: Start difference. First operand 1341 states and 2301 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:50,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:50,648 INFO L93 Difference]: Finished difference Result 2361 states and 3807 transitions. [2021-12-15 12:02:50,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:02:50,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-12-15 12:02:50,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:50,656 INFO L225 Difference]: With dead ends: 2361 [2021-12-15 12:02:50,656 INFO L226 Difference]: Without dead ends: 1803 [2021-12-15 12:02:50,658 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 [2021-12-15 12:02:50,659 INFO L933 BasicCegarLoop]: 1583 mSDtfsCounter, 1497 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1497 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:50,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1497 Valid, 1657 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:50,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1803 states. [2021-12-15 12:02:50,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1803 to 1801. [2021-12-15 12:02:50,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1799 states have (on average 1.6436909394107837) internal successors, (2957), 1800 states have internal predecessors, (2957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:50,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2957 transitions. [2021-12-15 12:02:50,767 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2957 transitions. Word has length 54 [2021-12-15 12:02:50,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:50,770 INFO L470 AbstractCegarLoop]: Abstraction has 1801 states and 2957 transitions. [2021-12-15 12:02:50,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:50,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2957 transitions. [2021-12-15 12:02:50,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-15 12:02:50,771 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:50,773 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] [2021-12-15 12:02:50,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 12:02:50,774 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:50,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:50,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1717241860, now seen corresponding path program 1 times [2021-12-15 12:02:50,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:50,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490692449] [2021-12-15 12:02:50,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:50,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:50,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:50,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:50,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:50,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490692449] [2021-12-15 12:02:50,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490692449] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:50,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:50,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 12:02:50,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13525717] [2021-12-15 12:02:50,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:50,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 12:02:50,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:50,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 12:02:50,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-15 12:02:50,901 INFO L87 Difference]: Start difference. First operand 1801 states and 2957 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:51,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:51,103 INFO L93 Difference]: Finished difference Result 2571 states and 4058 transitions. [2021-12-15 12:02:51,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 12:02:51,104 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-12-15 12:02:51,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:51,114 INFO L225 Difference]: With dead ends: 2571 [2021-12-15 12:02:51,114 INFO L226 Difference]: Without dead ends: 2569 [2021-12-15 12:02:51,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-15 12:02:51,116 INFO L933 BasicCegarLoop]: 1577 mSDtfsCounter, 498 mSDsluCounter, 9002 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 10579 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:51,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 10579 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 12:02:51,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2021-12-15 12:02:51,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 1849. [2021-12-15 12:02:51,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1847 states have (on average 1.6226312939902545) internal successors, (2997), 1848 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:51,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 2997 transitions. [2021-12-15 12:02:51,184 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 2997 transitions. Word has length 55 [2021-12-15 12:02:51,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:51,184 INFO L470 AbstractCegarLoop]: Abstraction has 1849 states and 2997 transitions. [2021-12-15 12:02:51,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:51,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 2997 transitions. [2021-12-15 12:02:51,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-15 12:02:51,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:51,186 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] [2021-12-15 12:02:51,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 12:02:51,186 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:51,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:51,186 INFO L85 PathProgramCache]: Analyzing trace with hash -754642547, now seen corresponding path program 1 times [2021-12-15 12:02:51,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:51,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858000139] [2021-12-15 12:02:51,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:51,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:51,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:51,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:51,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:51,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858000139] [2021-12-15 12:02:51,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858000139] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:51,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:51,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:02:51,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947550306] [2021-12-15 12:02:51,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:51,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:02:51,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:51,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:02:51,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:02:51,215 INFO L87 Difference]: Start difference. First operand 1849 states and 2997 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:51,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:51,266 INFO L93 Difference]: Finished difference Result 2944 states and 4587 transitions. [2021-12-15 12:02:51,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:02:51,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-12-15 12:02:51,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:51,273 INFO L225 Difference]: With dead ends: 2944 [2021-12-15 12:02:51,273 INFO L226 Difference]: Without dead ends: 2333 [2021-12-15 12:02:51,274 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 [2021-12-15 12:02:51,275 INFO L933 BasicCegarLoop]: 1591 mSDtfsCounter, 1498 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:51,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1661 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:51,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-12-15 12:02:51,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 2331. [2021-12-15 12:02:51,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2329 states have (on average 1.5762129669386002) internal successors, (3671), 2330 states have internal predecessors, (3671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:51,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 3671 transitions. [2021-12-15 12:02:51,333 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 3671 transitions. Word has length 56 [2021-12-15 12:02:51,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:51,333 INFO L470 AbstractCegarLoop]: Abstraction has 2331 states and 3671 transitions. [2021-12-15 12:02:51,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:51,334 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 3671 transitions. [2021-12-15 12:02:51,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-15 12:02:51,334 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:51,334 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] [2021-12-15 12:02:51,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 12:02:51,335 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:51,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:51,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1392228915, now seen corresponding path program 1 times [2021-12-15 12:02:51,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:51,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828741474] [2021-12-15 12:02:51,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:51,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:51,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:51,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828741474] [2021-12-15 12:02:51,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828741474] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:51,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:51,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:02:51,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877290940] [2021-12-15 12:02:51,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:51,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 12:02:51,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:51,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 12:02:51,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 12:02:51,403 INFO L87 Difference]: Start difference. First operand 2331 states and 3671 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:56,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:56,334 INFO L93 Difference]: Finished difference Result 4586 states and 7980 transitions. [2021-12-15 12:02:56,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 12:02:56,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-12-15 12:02:56,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:56,345 INFO L225 Difference]: With dead ends: 4586 [2021-12-15 12:02:56,345 INFO L226 Difference]: Without dead ends: 3833 [2021-12-15 12:02:56,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 12:02:56,347 INFO L933 BasicCegarLoop]: 776 mSDtfsCounter, 2373 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5354 mSolverCounterSat, 1161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2373 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 6515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1161 IncrementalHoareTripleChecker+Valid, 5354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:56,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2373 Valid, 794 Invalid, 6515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1161 Valid, 5354 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-12-15 12:02:56,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3833 states. [2021-12-15 12:02:56,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3833 to 3833. [2021-12-15 12:02:56,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3831 states have (on average 1.5100495954058992) internal successors, (5785), 3832 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:56,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 5785 transitions. [2021-12-15 12:02:56,442 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 5785 transitions. Word has length 67 [2021-12-15 12:02:56,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:56,443 INFO L470 AbstractCegarLoop]: Abstraction has 3833 states and 5785 transitions. [2021-12-15 12:02:56,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:56,443 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 5785 transitions. [2021-12-15 12:02:56,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-15 12:02:56,445 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:56,445 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:02:56,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 12:02:56,445 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:56,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:56,446 INFO L85 PathProgramCache]: Analyzing trace with hash 457839235, now seen corresponding path program 1 times [2021-12-15 12:02:56,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:56,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704421300] [2021-12-15 12:02:56,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:56,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:56,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:56,491 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-15 12:02:56,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:56,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704421300] [2021-12-15 12:02:56,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704421300] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:56,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:56,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 12:02:56,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663174753] [2021-12-15 12:02:56,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:56,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 12:02:56,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:56,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 12:02:56,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 12:02:56,493 INFO L87 Difference]: Start difference. First operand 3833 states and 5785 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:56,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:56,796 INFO L93 Difference]: Finished difference Result 10339 states and 15026 transitions. [2021-12-15 12:02:56,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 12:02:56,797 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 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 79 [2021-12-15 12:02:56,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:56,836 INFO L225 Difference]: With dead ends: 10339 [2021-12-15 12:02:56,836 INFO L226 Difference]: Without dead ends: 8793 [2021-12-15 12:02:56,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 12:02:56,845 INFO L933 BasicCegarLoop]: 1601 mSDtfsCounter, 4794 mSDsluCounter, 1759 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4794 SdHoareTripleChecker+Valid, 3360 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:56,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4794 Valid, 3360 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:56,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8793 states. [2021-12-15 12:02:57,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8793 to 5377. [2021-12-15 12:02:57,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5377 states, 5375 states have (on average 1.4811162790697674) internal successors, (7961), 5376 states have internal predecessors, (7961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:57,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5377 states to 5377 states and 7961 transitions. [2021-12-15 12:02:57,034 INFO L78 Accepts]: Start accepts. Automaton has 5377 states and 7961 transitions. Word has length 79 [2021-12-15 12:02:57,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:57,035 INFO L470 AbstractCegarLoop]: Abstraction has 5377 states and 7961 transitions. [2021-12-15 12:02:57,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:57,036 INFO L276 IsEmpty]: Start isEmpty. Operand 5377 states and 7961 transitions. [2021-12-15 12:02:57,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-15 12:02:57,037 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:57,037 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:02:57,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 12:02:57,037 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:57,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:57,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1705346851, now seen corresponding path program 1 times [2021-12-15 12:02:57,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:57,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786848813] [2021-12-15 12:02:57,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:57,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:57,126 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-15 12:02:57,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:57,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786848813] [2021-12-15 12:02:57,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786848813] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:57,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:57,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 12:02:57,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756880235] [2021-12-15 12:02:57,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:57,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 12:02:57,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:57,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 12:02:57,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 12:02:57,129 INFO L87 Difference]: Start difference. First operand 5377 states and 7961 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:57,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:57,410 INFO L93 Difference]: Finished difference Result 11883 states and 17202 transitions. [2021-12-15 12:02:57,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 12:02:57,411 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 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 79 [2021-12-15 12:02:57,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:57,429 INFO L225 Difference]: With dead ends: 11883 [2021-12-15 12:02:57,430 INFO L226 Difference]: Without dead ends: 10337 [2021-12-15 12:02:57,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 12:02:57,437 INFO L933 BasicCegarLoop]: 1603 mSDtfsCounter, 4743 mSDsluCounter, 1799 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4743 SdHoareTripleChecker+Valid, 3402 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:57,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4743 Valid, 3402 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:57,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10337 states. [2021-12-15 12:02:57,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10337 to 7697. [2021-12-15 12:02:57,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7697 states, 7695 states have (on average 1.456140350877193) internal successors, (11205), 7696 states have internal predecessors, (11205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:57,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7697 states to 7697 states and 11205 transitions. [2021-12-15 12:02:57,677 INFO L78 Accepts]: Start accepts. Automaton has 7697 states and 11205 transitions. Word has length 79 [2021-12-15 12:02:57,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:57,678 INFO L470 AbstractCegarLoop]: Abstraction has 7697 states and 11205 transitions. [2021-12-15 12:02:57,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:57,678 INFO L276 IsEmpty]: Start isEmpty. Operand 7697 states and 11205 transitions. [2021-12-15 12:02:57,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-15 12:02:57,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:57,680 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:02:57,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 12:02:57,680 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:57,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:57,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1979034563, now seen corresponding path program 1 times [2021-12-15 12:02:57,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:57,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765031430] [2021-12-15 12:02:57,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:57,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:57,733 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 12:02:57,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:57,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765031430] [2021-12-15 12:02:57,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765031430] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:57,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:57,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 12:02:57,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464091197] [2021-12-15 12:02:57,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:57,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 12:02:57,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:57,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 12:02:57,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 12:02:57,736 INFO L87 Difference]: Start difference. First operand 7697 states and 11205 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:58,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:58,105 INFO L93 Difference]: Finished difference Result 13427 states and 19378 transitions. [2021-12-15 12:02:58,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 12:02:58,106 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 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 79 [2021-12-15 12:02:58,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:58,129 INFO L225 Difference]: With dead ends: 13427 [2021-12-15 12:02:58,129 INFO L226 Difference]: Without dead ends: 11881 [2021-12-15 12:02:58,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 12:02:58,137 INFO L933 BasicCegarLoop]: 1601 mSDtfsCounter, 4774 mSDsluCounter, 1793 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4774 SdHoareTripleChecker+Valid, 3394 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:58,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4774 Valid, 3394 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:58,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11881 states. [2021-12-15 12:02:58,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11881 to 9241. [2021-12-15 12:02:58,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9241 states, 9239 states have (on average 1.4483169174153048) internal successors, (13381), 9240 states have internal predecessors, (13381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:58,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9241 states to 9241 states and 13381 transitions. [2021-12-15 12:02:58,430 INFO L78 Accepts]: Start accepts. Automaton has 9241 states and 13381 transitions. Word has length 79 [2021-12-15 12:02:58,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:58,431 INFO L470 AbstractCegarLoop]: Abstraction has 9241 states and 13381 transitions. [2021-12-15 12:02:58,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:58,431 INFO L276 IsEmpty]: Start isEmpty. Operand 9241 states and 13381 transitions. [2021-12-15 12:02:58,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-15 12:02:58,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:58,433 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:02:58,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 12:02:58,433 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:58,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:58,434 INFO L85 PathProgramCache]: Analyzing trace with hash 547636123, now seen corresponding path program 1 times [2021-12-15 12:02:58,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:58,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379971000] [2021-12-15 12:02:58,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:58,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:58,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:58,468 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:58,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:58,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379971000] [2021-12-15 12:02:58,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379971000] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:58,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:58,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:02:58,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399482983] [2021-12-15 12:02:58,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:58,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:02:58,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:58,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:02:58,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:02:58,470 INFO L87 Difference]: Start difference. First operand 9241 states and 13381 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:58,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:58,676 INFO L93 Difference]: Finished difference Result 14167 states and 20398 transitions. [2021-12-15 12:02:58,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:02:58,676 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-12-15 12:02:58,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:58,691 INFO L225 Difference]: With dead ends: 14167 [2021-12-15 12:02:58,692 INFO L226 Difference]: Without dead ends: 7213 [2021-12-15 12:02:58,701 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 [2021-12-15 12:02:58,702 INFO L933 BasicCegarLoop]: 1572 mSDtfsCounter, 45 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 3096 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:58,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 3096 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:58,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7213 states. [2021-12-15 12:02:58,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7213 to 7211. [2021-12-15 12:02:58,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7211 states, 7209 states have (on average 1.4602580108198087) internal successors, (10527), 7210 states have internal predecessors, (10527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:58,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7211 states to 7211 states and 10527 transitions. [2021-12-15 12:02:58,907 INFO L78 Accepts]: Start accepts. Automaton has 7211 states and 10527 transitions. Word has length 81 [2021-12-15 12:02:58,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:58,909 INFO L470 AbstractCegarLoop]: Abstraction has 7211 states and 10527 transitions. [2021-12-15 12:02:58,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:58,909 INFO L276 IsEmpty]: Start isEmpty. Operand 7211 states and 10527 transitions. [2021-12-15 12:02:58,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-15 12:02:58,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:58,911 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:02:58,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 12:02:58,911 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:58,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:58,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1706064798, now seen corresponding path program 1 times [2021-12-15 12:02:58,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:58,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090216073] [2021-12-15 12:02:58,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:58,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:58,960 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 12:02:58,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:58,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090216073] [2021-12-15 12:02:58,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090216073] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:58,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:58,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 12:02:58,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359137796] [2021-12-15 12:02:58,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:58,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 12:02:58,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:58,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 12:02:58,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 12:02:58,964 INFO L87 Difference]: Start difference. First operand 7211 states and 10527 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:59,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:59,291 INFO L93 Difference]: Finished difference Result 11573 states and 16740 transitions. [2021-12-15 12:02:59,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 12:02:59,292 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 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 81 [2021-12-15 12:02:59,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:59,308 INFO L225 Difference]: With dead ends: 11573 [2021-12-15 12:02:59,309 INFO L226 Difference]: Without dead ends: 10483 [2021-12-15 12:02:59,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 12:02:59,313 INFO L933 BasicCegarLoop]: 1600 mSDtfsCounter, 4760 mSDsluCounter, 1779 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4760 SdHoareTripleChecker+Valid, 3379 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:59,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4760 Valid, 3379 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:59,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10483 states. [2021-12-15 12:02:59,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10483 to 8299. [2021-12-15 12:02:59,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8299 states, 8297 states have (on average 1.4538989996384235) internal successors, (12063), 8298 states have internal predecessors, (12063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:59,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8299 states to 8299 states and 12063 transitions. [2021-12-15 12:02:59,657 INFO L78 Accepts]: Start accepts. Automaton has 8299 states and 12063 transitions. Word has length 81 [2021-12-15 12:02:59,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:59,657 INFO L470 AbstractCegarLoop]: Abstraction has 8299 states and 12063 transitions. [2021-12-15 12:02:59,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:59,658 INFO L276 IsEmpty]: Start isEmpty. Operand 8299 states and 12063 transitions. [2021-12-15 12:02:59,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-15 12:02:59,661 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:59,662 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:02:59,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 12:02:59,662 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:59,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:59,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1625443301, now seen corresponding path program 1 times [2021-12-15 12:02:59,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:59,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330379000] [2021-12-15 12:02:59,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:59,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:02:59,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:02:59,708 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:02:59,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:02:59,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330379000] [2021-12-15 12:02:59,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330379000] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:02:59,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:02:59,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:02:59,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786531731] [2021-12-15 12:02:59,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:02:59,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:02:59,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:02:59,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:02:59,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:02:59,711 INFO L87 Difference]: Start difference. First operand 8299 states and 12063 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:59,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:02:59,831 INFO L93 Difference]: Finished difference Result 11295 states and 16289 transitions. [2021-12-15 12:02:59,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:02:59,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-12-15 12:02:59,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:02:59,840 INFO L225 Difference]: With dead ends: 11295 [2021-12-15 12:02:59,840 INFO L226 Difference]: Without dead ends: 5309 [2021-12-15 12:02:59,848 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 [2021-12-15 12:02:59,848 INFO L933 BasicCegarLoop]: 1565 mSDtfsCounter, 39 mSDsluCounter, 1516 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 3081 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:02:59,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 3081 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:02:59,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5309 states. [2021-12-15 12:02:59,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5309 to 5307. [2021-12-15 12:02:59,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5307 states, 5305 states have (on average 1.469368520263902) internal successors, (7795), 5306 states have internal predecessors, (7795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:59,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5307 states to 5307 states and 7795 transitions. [2021-12-15 12:02:59,986 INFO L78 Accepts]: Start accepts. Automaton has 5307 states and 7795 transitions. Word has length 82 [2021-12-15 12:02:59,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:02:59,987 INFO L470 AbstractCegarLoop]: Abstraction has 5307 states and 7795 transitions. [2021-12-15 12:02:59,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:02:59,987 INFO L276 IsEmpty]: Start isEmpty. Operand 5307 states and 7795 transitions. [2021-12-15 12:02:59,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-15 12:02:59,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:02:59,988 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:02:59,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 12:02:59,989 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:02:59,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:02:59,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1082921701, now seen corresponding path program 1 times [2021-12-15 12:02:59,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:02:59,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35439047] [2021-12-15 12:02:59,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:02:59,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:03:00,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:03:00,038 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:03:00,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:03:00,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35439047] [2021-12-15 12:03:00,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35439047] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:03:00,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:03:00,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:03:00,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693507746] [2021-12-15 12:03:00,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:03:00,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:03:00,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:03:00,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:03:00,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:03:00,040 INFO L87 Difference]: Start difference. First operand 5307 states and 7795 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:03:00,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:03:00,111 INFO L93 Difference]: Finished difference Result 6807 states and 9887 transitions. [2021-12-15 12:03:00,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:03:00,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-12-15 12:03:00,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:03:00,118 INFO L225 Difference]: With dead ends: 6807 [2021-12-15 12:03:00,118 INFO L226 Difference]: Without dead ends: 3813 [2021-12-15 12:03:00,122 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 [2021-12-15 12:03:00,123 INFO L933 BasicCegarLoop]: 1558 mSDtfsCounter, 35 mSDsluCounter, 1508 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 3066 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:03:00,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 3066 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:03:00,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2021-12-15 12:03:00,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 3811. [2021-12-15 12:03:00,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3811 states, 3809 states have (on average 1.4919926489892361) internal successors, (5683), 3810 states have internal predecessors, (5683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:03:00,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3811 states to 3811 states and 5683 transitions. [2021-12-15 12:03:00,207 INFO L78 Accepts]: Start accepts. Automaton has 3811 states and 5683 transitions. Word has length 82 [2021-12-15 12:03:00,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:03:00,207 INFO L470 AbstractCegarLoop]: Abstraction has 3811 states and 5683 transitions. [2021-12-15 12:03:00,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:03:00,208 INFO L276 IsEmpty]: Start isEmpty. Operand 3811 states and 5683 transitions. [2021-12-15 12:03:00,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-15 12:03:00,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:03:00,209 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:03:00,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 12:03:00,209 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:03:00,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:03:00,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1170040495, now seen corresponding path program 1 times [2021-12-15 12:03:00,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:03:00,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155944204] [2021-12-15 12:03:00,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:03:00,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:03:00,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:03:00,288 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:03:00,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:03:00,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155944204] [2021-12-15 12:03:00,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155944204] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:03:00,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:03:00,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 12:03:00,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243452621] [2021-12-15 12:03:00,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:03:00,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 12:03:00,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:03:00,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 12:03:00,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 12:03:00,290 INFO L87 Difference]: Start difference. First operand 3811 states and 5683 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:03:00,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:03:00,331 INFO L93 Difference]: Finished difference Result 4563 states and 6719 transitions. [2021-12-15 12:03:00,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 12:03:00,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-12-15 12:03:00,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:03:00,338 INFO L225 Difference]: With dead ends: 4563 [2021-12-15 12:03:00,338 INFO L226 Difference]: Without dead ends: 3065 [2021-12-15 12:03:00,340 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 [2021-12-15 12:03:00,340 INFO L933 BasicCegarLoop]: 1551 mSDtfsCounter, 31 mSDsluCounter, 1500 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 3051 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:03:00,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 3051 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:03:00,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3065 states. [2021-12-15 12:03:00,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3065 to 3063. [2021-12-15 12:03:00,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 3061 states have (on average 1.5151911140150278) internal successors, (4638), 3062 states have internal predecessors, (4638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:03:00,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 4638 transitions. [2021-12-15 12:03:00,389 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 4638 transitions. Word has length 82 [2021-12-15 12:03:00,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:03:00,390 INFO L470 AbstractCegarLoop]: Abstraction has 3063 states and 4638 transitions. [2021-12-15 12:03:00,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:03:00,390 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 4638 transitions. [2021-12-15 12:03:00,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-15 12:03:00,391 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:03:00,391 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:03:00,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 12:03:00,391 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:03:00,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:03:00,392 INFO L85 PathProgramCache]: Analyzing trace with hash 2005651591, now seen corresponding path program 1 times [2021-12-15 12:03:00,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:03:00,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148902426] [2021-12-15 12:03:00,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:03:00,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:03:00,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:03:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:03:00,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:03:00,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148902426] [2021-12-15 12:03:00,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148902426] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 12:03:00,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203961005] [2021-12-15 12:03:00,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:03:00,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 12:03:00,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:03:00,604 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 12:03:00,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 12:03:00,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:03:00,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 12:03:00,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 12:03:01,110 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 12:03:01,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 12:03:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 12:03:01,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203961005] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 12:03:01,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 12:03:01,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2021-12-15 12:03:01,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506764794] [2021-12-15 12:03:01,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 12:03:01,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-15 12:03:01,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:03:01,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-15 12:03:01,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-15 12:03:01,307 INFO L87 Difference]: Start difference. First operand 3063 states and 4638 transitions. Second operand has 18 states, 18 states have (on average 12.722222222222221) internal successors, (229), 18 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:03:04,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:03:04,081 INFO L93 Difference]: Finished difference Result 12222 states and 16849 transitions. [2021-12-15 12:03:04,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-15 12:03:04,082 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 12.722222222222221) internal successors, (229), 18 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-15 12:03:04,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:03:04,099 INFO L225 Difference]: With dead ends: 12222 [2021-12-15 12:03:04,099 INFO L226 Difference]: Without dead ends: 11472 [2021-12-15 12:03:04,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2225 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1175, Invalid=5467, Unknown=0, NotChecked=0, Total=6642 [2021-12-15 12:03:04,106 INFO L933 BasicCegarLoop]: 1547 mSDtfsCounter, 19818 mSDsluCounter, 5136 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19818 SdHoareTripleChecker+Valid, 6683 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 12:03:04,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19818 Valid, 6683 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 12:03:04,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11472 states. [2021-12-15 12:03:04,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11472 to 8732. [2021-12-15 12:03:04,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8732 states, 8730 states have (on average 1.3626575028636885) internal successors, (11896), 8731 states have internal predecessors, (11896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:03:04,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8732 states to 8732 states and 11896 transitions. [2021-12-15 12:03:04,409 INFO L78 Accepts]: Start accepts. Automaton has 8732 states and 11896 transitions. Word has length 82 [2021-12-15 12:03:04,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:03:04,411 INFO L470 AbstractCegarLoop]: Abstraction has 8732 states and 11896 transitions. [2021-12-15 12:03:04,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 12.722222222222221) internal successors, (229), 18 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:03:04,412 INFO L276 IsEmpty]: Start isEmpty. Operand 8732 states and 11896 transitions. [2021-12-15 12:03:04,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-15 12:03:04,416 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:03:04,416 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:03:04,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 12:03:04,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 12:03:04,645 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:03:04,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:03:04,646 INFO L85 PathProgramCache]: Analyzing trace with hash -10585946, now seen corresponding path program 1 times [2021-12-15 12:03:04,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:03:04,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104942060] [2021-12-15 12:03:04,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:03:04,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:03:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:03:04,848 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:03:04,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:03:04,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104942060] [2021-12-15 12:03:04,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104942060] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 12:03:04,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639809958] [2021-12-15 12:03:04,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:03:04,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 12:03:04,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:03:04,851 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 12:03:04,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 12:03:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:03:04,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-15 12:03:04,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 12:03:05,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:03:05,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 12:03:06,163 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:03:06,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639809958] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 12:03:06,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 12:03:06,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 27 [2021-12-15 12:03:06,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445648794] [2021-12-15 12:03:06,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 12:03:06,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-15 12:03:06,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:03:06,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-15 12:03:06,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-12-15 12:03:06,166 INFO L87 Difference]: Start difference. First operand 8732 states and 11896 transitions. Second operand has 28 states, 28 states have (on average 7.821428571428571) internal successors, (219), 27 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:03:08,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:03:08,549 INFO L93 Difference]: Finished difference Result 37479 states and 48378 transitions. [2021-12-15 12:03:08,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-15 12:03:08,550 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 7.821428571428571) internal successors, (219), 27 states have internal predecessors, (219), 0 states have call successors, (0), 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 83 [2021-12-15 12:03:08,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:03:08,602 INFO L225 Difference]: With dead ends: 37479 [2021-12-15 12:03:08,602 INFO L226 Difference]: Without dead ends: 31530 [2021-12-15 12:03:08,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=555, Invalid=1895, Unknown=0, NotChecked=0, Total=2450 [2021-12-15 12:03:08,621 INFO L933 BasicCegarLoop]: 1529 mSDtfsCounter, 15989 mSDsluCounter, 5103 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15989 SdHoareTripleChecker+Valid, 6632 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 12:03:08,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15989 Valid, 6632 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 12:03:08,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31530 states. [2021-12-15 12:03:09,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31530 to 19339. [2021-12-15 12:03:09,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19339 states, 19337 states have (on average 1.3154574132492114) internal successors, (25437), 19338 states have internal predecessors, (25437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:03:09,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19339 states to 19339 states and 25437 transitions. [2021-12-15 12:03:09,672 INFO L78 Accepts]: Start accepts. Automaton has 19339 states and 25437 transitions. Word has length 83 [2021-12-15 12:03:09,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:03:09,673 INFO L470 AbstractCegarLoop]: Abstraction has 19339 states and 25437 transitions. [2021-12-15 12:03:09,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.821428571428571) internal successors, (219), 27 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:03:09,673 INFO L276 IsEmpty]: Start isEmpty. Operand 19339 states and 25437 transitions. [2021-12-15 12:03:09,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-15 12:03:09,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:03:09,674 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:03:09,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 12:03:09,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-15 12:03:09,888 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:03:09,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:03:09,888 INFO L85 PathProgramCache]: Analyzing trace with hash 879036518, now seen corresponding path program 1 times [2021-12-15 12:03:09,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:03:09,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970534601] [2021-12-15 12:03:09,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:03:09,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:03:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:03:10,031 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:03:10,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:03:10,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970534601] [2021-12-15 12:03:10,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970534601] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 12:03:10,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308166348] [2021-12-15 12:03:10,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:03:10,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 12:03:10,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 12:03:10,033 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 12:03:10,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 12:03:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:03:10,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-15 12:03:10,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 12:03:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:03:10,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 12:03:11,334 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 12:03:11,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308166348] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 12:03:11,335 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 12:03:11,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2021-12-15 12:03:11,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003808846] [2021-12-15 12:03:11,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 12:03:11,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-15 12:03:11,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:03:11,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-15 12:03:11,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-12-15 12:03:11,336 INFO L87 Difference]: Start difference. First operand 19339 states and 25437 transitions. Second operand has 25 states, 25 states have (on average 8.36) internal successors, (209), 24 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:03:23,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:03:23,204 INFO L93 Difference]: Finished difference Result 195089 states and 249077 transitions. [2021-12-15 12:03:23,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-15 12:03:23,205 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 8.36) internal successors, (209), 24 states have internal predecessors, (209), 0 states have call successors, (0), 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 83 [2021-12-15 12:03:23,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:03:23,478 INFO L225 Difference]: With dead ends: 195089 [2021-12-15 12:03:23,478 INFO L226 Difference]: Without dead ends: 178510 [2021-12-15 12:03:23,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1884 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1256, Invalid=6054, Unknown=0, NotChecked=0, Total=7310 [2021-12-15 12:03:23,742 INFO L933 BasicCegarLoop]: 1594 mSDtfsCounter, 20613 mSDsluCounter, 9161 mSDsCounter, 0 mSdLazyCounter, 1842 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20613 SdHoareTripleChecker+Valid, 10755 SdHoareTripleChecker+Invalid, 2054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 12:03:23,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20613 Valid, 10755 Invalid, 2054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1842 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 12:03:23,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178510 states. [2021-12-15 12:03:30,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178510 to 106158. [2021-12-15 12:03:31,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106158 states, 106156 states have (on average 1.2467123855458004) internal successors, (132346), 106157 states have internal predecessors, (132346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:03:31,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106158 states to 106158 states and 132346 transitions. [2021-12-15 12:03:31,228 INFO L78 Accepts]: Start accepts. Automaton has 106158 states and 132346 transitions. Word has length 83 [2021-12-15 12:03:31,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:03:31,229 INFO L470 AbstractCegarLoop]: Abstraction has 106158 states and 132346 transitions. [2021-12-15 12:03:31,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.36) internal successors, (209), 24 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:03:31,229 INFO L276 IsEmpty]: Start isEmpty. Operand 106158 states and 132346 transitions. [2021-12-15 12:03:31,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-15 12:03:31,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:03:31,232 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:03:31,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 12:03:31,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 12:03:31,440 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:03:31,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:03:31,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1541620906, now seen corresponding path program 1 times [2021-12-15 12:03:31,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:03:31,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374323777] [2021-12-15 12:03:31,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:03:31,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:03:31,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:03:31,489 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 12:03:31,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:03:31,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374323777] [2021-12-15 12:03:31,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374323777] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:03:31,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:03:31,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 12:03:31,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810345217] [2021-12-15 12:03:31,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:03:31,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 12:03:31,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:03:31,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 12:03:31,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 12:03:31,492 INFO L87 Difference]: Start difference. First operand 106158 states and 132346 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:03:35,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:03:35,073 INFO L93 Difference]: Finished difference Result 156595 states and 196014 transitions. [2021-12-15 12:03:35,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 12:03:35,074 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 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 83 [2021-12-15 12:03:35,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:03:35,169 INFO L225 Difference]: With dead ends: 156595 [2021-12-15 12:03:35,169 INFO L226 Difference]: Without dead ends: 52901 [2021-12-15 12:03:35,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 12:03:35,216 INFO L933 BasicCegarLoop]: 1506 mSDtfsCounter, 4552 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4552 SdHoareTripleChecker+Valid, 2995 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:03:35,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4552 Valid, 2995 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:03:35,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52901 states. [2021-12-15 12:03:38,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52901 to 52901. [2021-12-15 12:03:38,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52901 states, 52899 states have (on average 1.2514036182158452) internal successors, (66198), 52900 states have internal predecessors, (66198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:03:38,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52901 states to 52901 states and 66198 transitions. [2021-12-15 12:03:38,470 INFO L78 Accepts]: Start accepts. Automaton has 52901 states and 66198 transitions. Word has length 83 [2021-12-15 12:03:38,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 12:03:38,470 INFO L470 AbstractCegarLoop]: Abstraction has 52901 states and 66198 transitions. [2021-12-15 12:03:38,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:03:38,470 INFO L276 IsEmpty]: Start isEmpty. Operand 52901 states and 66198 transitions. [2021-12-15 12:03:38,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-15 12:03:38,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 12:03:38,472 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 12:03:38,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-15 12:03:38,472 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 12:03:38,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 12:03:38,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1994591510, now seen corresponding path program 1 times [2021-12-15 12:03:38,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 12:03:38,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665861910] [2021-12-15 12:03:38,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 12:03:38,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 12:03:38,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 12:03:38,505 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 12:03:38,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 12:03:38,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665861910] [2021-12-15 12:03:38,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665861910] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 12:03:38,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 12:03:38,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 12:03:38,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104675481] [2021-12-15 12:03:38,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 12:03:38,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 12:03:38,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 12:03:38,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 12:03:38,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 12:03:38,507 INFO L87 Difference]: Start difference. First operand 52901 states and 66198 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 12:03:41,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 12:03:41,309 INFO L93 Difference]: Finished difference Result 90492 states and 112852 transitions. [2021-12-15 12:03:41,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 12:03:41,309 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 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 83 [2021-12-15 12:03:41,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 12:03:41,371 INFO L225 Difference]: With dead ends: 90492 [2021-12-15 12:03:41,371 INFO L226 Difference]: Without dead ends: 40067 [2021-12-15 12:03:41,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 12:03:41,401 INFO L933 BasicCegarLoop]: 1506 mSDtfsCounter, 4620 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4620 SdHoareTripleChecker+Valid, 2976 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 12:03:41,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4620 Valid, 2976 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 12:03:41,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40067 states.