./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/product-lines/elevator_spec2_product22.cil.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 8090ac1e7e8284dad30217492085f9e11f6491349a4adb4aa3c2904a72e0131a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 11:18:08,098 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 11:18:08,100 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 11:18:08,125 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 11:18:08,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 11:18:08,130 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 11:18:08,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 11:18:08,137 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 11:18:08,139 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 11:18:08,144 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 11:18:08,145 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 11:18:08,146 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 11:18:08,146 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 11:18:08,148 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 11:18:08,150 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 11:18:08,151 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 11:18:08,152 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 11:18:08,152 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 11:18:08,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 11:18:08,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 11:18:08,160 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 11:18:08,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 11:18:08,162 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 11:18:08,163 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 11:18:08,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 11:18:08,166 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 11:18:08,166 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 11:18:08,167 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 11:18:08,168 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 11:18:08,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 11:18:08,169 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 11:18:08,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 11:18:08,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 11:18:08,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 11:18:08,172 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 11:18:08,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 11:18:08,173 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 11:18:08,173 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 11:18:08,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 11:18:08,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 11:18:08,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 11:18:08,175 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 11:18:08,197 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 11:18:08,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 11:18:08,215 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 11:18:08,215 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 11:18:08,216 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 11:18:08,216 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 11:18:08,216 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 11:18:08,217 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 11:18:08,217 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 11:18:08,217 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 11:18:08,218 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 11:18:08,218 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 11:18:08,218 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 11:18:08,218 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 11:18:08,218 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 11:18:08,218 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 11:18:08,219 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 11:18:08,219 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 11:18:08,219 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 11:18:08,219 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 11:18:08,219 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 11:18:08,219 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 11:18:08,219 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 11:18:08,220 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 11:18:08,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:18:08,220 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 11:18:08,220 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 11:18:08,220 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 11:18:08,221 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 11:18:08,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 11:18:08,221 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 11:18:08,221 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 11:18:08,221 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 11:18:08,221 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 11:18:08,221 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8090ac1e7e8284dad30217492085f9e11f6491349a4adb4aa3c2904a72e0131a [2021-12-22 11:18:08,360 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 11:18:08,383 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 11:18:08,385 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 11:18:08,386 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 11:18:08,387 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 11:18:08,389 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c [2021-12-22 11:18:08,444 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/338f66246/9cb3571696ef42c1b1f689167e2c28e5/FLAG01525ff2f [2021-12-22 11:18:08,892 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 11:18:08,892 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c [2021-12-22 11:18:08,914 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/338f66246/9cb3571696ef42c1b1f689167e2c28e5/FLAG01525ff2f [2021-12-22 11:18:09,223 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/338f66246/9cb3571696ef42c1b1f689167e2c28e5 [2021-12-22 11:18:09,225 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 11:18:09,226 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 11:18:09,235 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 11:18:09,236 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 11:18:09,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 11:18:09,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:18:09" (1/1) ... [2021-12-22 11:18:09,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@425036c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:18:09, skipping insertion in model container [2021-12-22 11:18:09,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:18:09" (1/1) ... [2021-12-22 11:18:09,246 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 11:18:09,299 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 11:18:09,431 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/product-lines/elevator_spec2_product22.cil.c[1545,1558] [2021-12-22 11:18:09,613 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:18:09,620 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 11:18:09,635 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/product-lines/elevator_spec2_product22.cil.c[1545,1558] [2021-12-22 11:18:09,707 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:18:09,726 INFO L208 MainTranslator]: Completed translation [2021-12-22 11:18:09,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:18:09 WrapperNode [2021-12-22 11:18:09,727 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 11:18:09,728 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 11:18:09,728 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 11:18:09,728 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 11:18:09,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:18:09" (1/1) ... [2021-12-22 11:18:09,762 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:18:09" (1/1) ... [2021-12-22 11:18:09,803 INFO L137 Inliner]: procedures = 94, calls = 345, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 876 [2021-12-22 11:18:09,803 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 11:18:09,804 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 11:18:09,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 11:18:09,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 11:18:09,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:18:09" (1/1) ... [2021-12-22 11:18:09,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:18:09" (1/1) ... [2021-12-22 11:18:09,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:18:09" (1/1) ... [2021-12-22 11:18:09,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:18:09" (1/1) ... [2021-12-22 11:18:09,826 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:18:09" (1/1) ... [2021-12-22 11:18:09,835 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:18:09" (1/1) ... [2021-12-22 11:18:09,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:18:09" (1/1) ... [2021-12-22 11:18:09,845 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 11:18:09,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 11:18:09,846 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 11:18:09,846 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 11:18:09,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:18:09" (1/1) ... [2021-12-22 11:18:09,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:18:09,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:18:09,931 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) [2021-12-22 11:18:09,934 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 [2021-12-22 11:18:09,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 11:18:09,976 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-12-22 11:18:09,976 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-12-22 11:18:09,976 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-12-22 11:18:09,976 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-12-22 11:18:09,977 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-12-22 11:18:09,977 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-12-22 11:18:09,978 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-12-22 11:18:09,978 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-12-22 11:18:09,978 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-12-22 11:18:09,978 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-12-22 11:18:09,979 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-12-22 11:18:09,979 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-12-22 11:18:09,979 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-12-22 11:18:09,979 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-12-22 11:18:09,979 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-12-22 11:18:09,979 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-12-22 11:18:09,979 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-12-22 11:18:09,979 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-12-22 11:18:09,980 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-12-22 11:18:09,980 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-12-22 11:18:09,980 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-12-22 11:18:09,980 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-12-22 11:18:09,980 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-12-22 11:18:09,980 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-12-22 11:18:09,980 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-12-22 11:18:09,980 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-12-22 11:18:09,980 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-12-22 11:18:09,981 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-12-22 11:18:09,981 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-12-22 11:18:09,981 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-12-22 11:18:09,981 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-12-22 11:18:09,981 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-12-22 11:18:09,981 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-12-22 11:18:09,981 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-12-22 11:18:09,982 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-12-22 11:18:09,982 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-12-22 11:18:09,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 11:18:09,982 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-12-22 11:18:09,982 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-12-22 11:18:09,982 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-12-22 11:18:09,982 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-12-22 11:18:09,983 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-12-22 11:18:09,983 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-12-22 11:18:09,983 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-12-22 11:18:09,983 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-12-22 11:18:09,983 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2021-12-22 11:18:09,983 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2021-12-22 11:18:09,983 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-12-22 11:18:09,983 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-12-22 11:18:09,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 11:18:09,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 11:18:09,984 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-12-22 11:18:09,984 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-12-22 11:18:10,140 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 11:18:10,147 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 11:18:10,824 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 11:18:10,832 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 11:18:10,832 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 11:18:10,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:18:10 BoogieIcfgContainer [2021-12-22 11:18:10,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 11:18:10,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 11:18:10,835 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 11:18:10,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 11:18:10,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:18:09" (1/3) ... [2021-12-22 11:18:10,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf9f47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:18:10, skipping insertion in model container [2021-12-22 11:18:10,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:18:09" (2/3) ... [2021-12-22 11:18:10,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf9f47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:18:10, skipping insertion in model container [2021-12-22 11:18:10,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:18:10" (3/3) ... [2021-12-22 11:18:10,840 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product22.cil.c [2021-12-22 11:18:10,843 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 11:18:10,843 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 11:18:10,873 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 11:18:10,878 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 [2021-12-22 11:18:10,878 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 11:18:10,895 INFO L276 IsEmpty]: Start isEmpty. Operand has 572 states, 447 states have (on average 1.691275167785235) internal successors, (756), 470 states have internal predecessors, (756), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 91 states have call predecessors, (98), 98 states have call successors, (98) [2021-12-22 11:18:10,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-22 11:18:10,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:18:10,905 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] [2021-12-22 11:18:10,906 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:18:10,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:18:10,909 INFO L85 PathProgramCache]: Analyzing trace with hash -992084887, now seen corresponding path program 1 times [2021-12-22 11:18:10,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:18:10,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488804238] [2021-12-22 11:18:10,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:18:10,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:18:11,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:11,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 11:18:11,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:11,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:11,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:11,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 11:18:11,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:11,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 11:18:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:11,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:11,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:11,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:11,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:11,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 11:18:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:11,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:18:11,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:18:11,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488804238] [2021-12-22 11:18:11,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488804238] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:18:11,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:18:11,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:18:11,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875804606] [2021-12-22 11:18:11,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:18:11,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:18:11,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:18:11,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:18:11,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:18:11,565 INFO L87 Difference]: Start difference. First operand has 572 states, 447 states have (on average 1.691275167785235) internal successors, (756), 470 states have internal predecessors, (756), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 91 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 11:18:14,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:18:14,851 INFO L93 Difference]: Finished difference Result 1287 states and 2173 transitions. [2021-12-22 11:18:14,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 11:18:14,854 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 60 [2021-12-22 11:18:14,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:18:14,868 INFO L225 Difference]: With dead ends: 1287 [2021-12-22 11:18:14,868 INFO L226 Difference]: Without dead ends: 727 [2021-12-22 11:18:14,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:18:14,878 INFO L933 BasicCegarLoop]: 863 mSDtfsCounter, 1140 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 1998 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1224 SdHoareTripleChecker+Valid, 1888 SdHoareTripleChecker+Invalid, 2292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 1998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-22 11:18:14,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1224 Valid, 1888 Invalid, 2292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 1998 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-22 11:18:14,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-12-22 11:18:14,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 564. [2021-12-22 11:18:14,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 441 states have (on average 1.6870748299319729) internal successors, (744), 462 states have internal predecessors, (744), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 90 states have call predecessors, (93), 93 states have call successors, (93) [2021-12-22 11:18:14,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 935 transitions. [2021-12-22 11:18:14,966 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 935 transitions. Word has length 60 [2021-12-22 11:18:14,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:18:14,966 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 935 transitions. [2021-12-22 11:18:14,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 11:18:14,966 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 935 transitions. [2021-12-22 11:18:14,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-22 11:18:14,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:18:14,970 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] [2021-12-22 11:18:14,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 11:18:14,971 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:18:14,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:18:14,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1651182718, now seen corresponding path program 1 times [2021-12-22 11:18:14,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:18:14,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676596249] [2021-12-22 11:18:14,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:18:14,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:18:14,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:15,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 11:18:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:15,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:15,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:15,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 11:18:15,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:15,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-22 11:18:15,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:15,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:15,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:15,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:15,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:15,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 11:18:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:15,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:18:15,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:18:15,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676596249] [2021-12-22 11:18:15,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676596249] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:18:15,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:18:15,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:18:15,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745108742] [2021-12-22 11:18:15,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:18:15,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:18:15,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:18:15,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:18:15,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:18:15,209 INFO L87 Difference]: Start difference. First operand 564 states and 935 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 11:18:18,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:18:18,155 INFO L93 Difference]: Finished difference Result 1273 states and 2139 transitions. [2021-12-22 11:18:18,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 11:18:18,156 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 63 [2021-12-22 11:18:18,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:18:18,164 INFO L225 Difference]: With dead ends: 1273 [2021-12-22 11:18:18,164 INFO L226 Difference]: Without dead ends: 727 [2021-12-22 11:18:18,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:18:18,170 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 1138 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 1996 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1222 SdHoareTripleChecker+Valid, 1851 SdHoareTripleChecker+Invalid, 2292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 1996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-22 11:18:18,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1222 Valid, 1851 Invalid, 2292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 1996 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-22 11:18:18,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-12-22 11:18:18,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 564. [2021-12-22 11:18:18,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 441 states have (on average 1.6848072562358276) internal successors, (743), 462 states have internal predecessors, (743), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 90 states have call predecessors, (93), 93 states have call successors, (93) [2021-12-22 11:18:18,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 934 transitions. [2021-12-22 11:18:18,250 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 934 transitions. Word has length 63 [2021-12-22 11:18:18,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:18:18,251 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 934 transitions. [2021-12-22 11:18:18,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 11:18:18,252 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 934 transitions. [2021-12-22 11:18:18,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-22 11:18:18,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:18:18,257 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:18:18,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 11:18:18,258 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:18:18,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:18:18,258 INFO L85 PathProgramCache]: Analyzing trace with hash 722898553, now seen corresponding path program 1 times [2021-12-22 11:18:18,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:18:18,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538748274] [2021-12-22 11:18:18,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:18:18,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:18:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:18,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 11:18:18,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:18,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:18,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:18,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 11:18:18,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:18,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 11:18:18,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:18,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:18,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:18,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:18,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 11:18:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:18:18,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:18:18,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538748274] [2021-12-22 11:18:18,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538748274] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:18:18,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:18:18,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:18:18,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911526402] [2021-12-22 11:18:18,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:18:18,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:18:18,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:18:18,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:18:18,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:18:18,517 INFO L87 Difference]: Start difference. First operand 564 states and 934 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 11:18:21,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:18:21,887 INFO L93 Difference]: Finished difference Result 1273 states and 2138 transitions. [2021-12-22 11:18:21,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 11:18:21,888 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 64 [2021-12-22 11:18:21,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:18:21,892 INFO L225 Difference]: With dead ends: 1273 [2021-12-22 11:18:21,892 INFO L226 Difference]: Without dead ends: 727 [2021-12-22 11:18:21,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:18:21,900 INFO L933 BasicCegarLoop]: 848 mSDtfsCounter, 680 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 2169 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 1851 SdHoareTripleChecker+Invalid, 2316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 2169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:18:21,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [764 Valid, 1851 Invalid, 2316 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [147 Valid, 2169 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-22 11:18:21,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-12-22 11:18:21,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 564. [2021-12-22 11:18:21,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 441 states have (on average 1.6825396825396826) internal successors, (742), 462 states have internal predecessors, (742), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 90 states have call predecessors, (93), 93 states have call successors, (93) [2021-12-22 11:18:21,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 933 transitions. [2021-12-22 11:18:21,942 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 933 transitions. Word has length 64 [2021-12-22 11:18:21,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:18:21,942 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 933 transitions. [2021-12-22 11:18:21,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 11:18:21,943 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 933 transitions. [2021-12-22 11:18:21,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 11:18:21,944 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:18:21,944 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] [2021-12-22 11:18:21,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 11:18:21,947 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:18:21,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:18:21,948 INFO L85 PathProgramCache]: Analyzing trace with hash 342813406, now seen corresponding path program 1 times [2021-12-22 11:18:21,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:18:21,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880539373] [2021-12-22 11:18:21,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:18:21,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:18:21,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:22,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 11:18:22,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:22,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:22,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:22,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 11:18:22,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:22,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 11:18:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:22,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:22,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:22,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:22,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 11:18:22,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:18:22,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:18:22,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880539373] [2021-12-22 11:18:22,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880539373] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:18:22,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:18:22,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:18:22,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353029339] [2021-12-22 11:18:22,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:18:22,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:18:22,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:18:22,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:18:22,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:18:22,287 INFO L87 Difference]: Start difference. First operand 564 states and 933 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 11:18:25,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:18:25,021 INFO L93 Difference]: Finished difference Result 1273 states and 2137 transitions. [2021-12-22 11:18:25,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 11:18:25,022 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-22 11:18:25,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:18:25,044 INFO L225 Difference]: With dead ends: 1273 [2021-12-22 11:18:25,044 INFO L226 Difference]: Without dead ends: 727 [2021-12-22 11:18:25,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:18:25,051 INFO L933 BasicCegarLoop]: 849 mSDtfsCounter, 1133 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 1992 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1217 SdHoareTripleChecker+Valid, 1840 SdHoareTripleChecker+Invalid, 2292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 1992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-22 11:18:25,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1217 Valid, 1840 Invalid, 2292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 1992 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-22 11:18:25,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-12-22 11:18:25,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 564. [2021-12-22 11:18:25,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 441 states have (on average 1.6802721088435375) internal successors, (741), 462 states have internal predecessors, (741), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 90 states have call predecessors, (93), 93 states have call successors, (93) [2021-12-22 11:18:25,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 932 transitions. [2021-12-22 11:18:25,084 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 932 transitions. Word has length 65 [2021-12-22 11:18:25,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:18:25,085 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 932 transitions. [2021-12-22 11:18:25,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 11:18:25,086 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 932 transitions. [2021-12-22 11:18:25,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 11:18:25,089 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:18:25,089 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] [2021-12-22 11:18:25,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 11:18:25,089 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:18:25,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:18:25,090 INFO L85 PathProgramCache]: Analyzing trace with hash 482915221, now seen corresponding path program 1 times [2021-12-22 11:18:25,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:18:25,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783952307] [2021-12-22 11:18:25,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:18:25,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:18:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:25,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 11:18:25,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:25,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:25,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 11:18:25,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:25,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 11:18:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:25,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:25,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:25,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:25,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 11:18:25,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:25,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:18:25,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:18:25,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783952307] [2021-12-22 11:18:25,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783952307] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:18:25,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:18:25,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:18:25,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653882402] [2021-12-22 11:18:25,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:18:25,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:18:25,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:18:25,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:18:25,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:18:25,352 INFO L87 Difference]: Start difference. First operand 564 states and 932 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 11:18:28,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:18:28,729 INFO L93 Difference]: Finished difference Result 1273 states and 2136 transitions. [2021-12-22 11:18:28,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 11:18:28,730 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-12-22 11:18:28,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:18:28,733 INFO L225 Difference]: With dead ends: 1273 [2021-12-22 11:18:28,734 INFO L226 Difference]: Without dead ends: 727 [2021-12-22 11:18:28,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:18:28,736 INFO L933 BasicCegarLoop]: 858 mSDtfsCounter, 674 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 1881 SdHoareTripleChecker+Invalid, 2308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:18:28,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [758 Valid, 1881 Invalid, 2308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 2165 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-22 11:18:28,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-12-22 11:18:28,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 564. [2021-12-22 11:18:28,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 441 states have (on average 1.6780045351473922) internal successors, (740), 462 states have internal predecessors, (740), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 90 states have call predecessors, (93), 93 states have call successors, (93) [2021-12-22 11:18:28,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 931 transitions. [2021-12-22 11:18:28,767 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 931 transitions. Word has length 66 [2021-12-22 11:18:28,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:18:28,768 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 931 transitions. [2021-12-22 11:18:28,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 11:18:28,768 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 931 transitions. [2021-12-22 11:18:28,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-22 11:18:28,769 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:18:28,769 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] [2021-12-22 11:18:28,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 11:18:28,770 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:18:28,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:18:28,770 INFO L85 PathProgramCache]: Analyzing trace with hash -431056326, now seen corresponding path program 1 times [2021-12-22 11:18:28,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:18:28,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408475959] [2021-12-22 11:18:28,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:18:28,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:18:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:28,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 11:18:28,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:28,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:28,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:18:28,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:29,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 11:18:29,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:29,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:29,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:29,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 11:18:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:29,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:18:29,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:18:29,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408475959] [2021-12-22 11:18:29,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408475959] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:18:29,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:18:29,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 11:18:29,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586592471] [2021-12-22 11:18:29,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:18:29,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 11:18:29,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:18:29,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 11:18:29,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 11:18:29,070 INFO L87 Difference]: Start difference. First operand 564 states and 931 transitions. Second operand has 9 states, 8 states have (on average 6.5) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 11:18:32,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:18:32,460 INFO L93 Difference]: Finished difference Result 1250 states and 2086 transitions. [2021-12-22 11:18:32,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 11:18:32,461 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 67 [2021-12-22 11:18:32,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:18:32,464 INFO L225 Difference]: With dead ends: 1250 [2021-12-22 11:18:32,464 INFO L226 Difference]: Without dead ends: 753 [2021-12-22 11:18:32,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-22 11:18:32,467 INFO L933 BasicCegarLoop]: 858 mSDtfsCounter, 1239 mSDsluCounter, 2174 mSDsCounter, 0 mSdLazyCounter, 4052 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1324 SdHoareTripleChecker+Valid, 3032 SdHoareTripleChecker+Invalid, 4357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 4052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-22 11:18:32,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1324 Valid, 3032 Invalid, 4357 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [305 Valid, 4052 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-22 11:18:32,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-12-22 11:18:32,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 577. [2021-12-22 11:18:32,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 451 states have (on average 1.6740576496674058) internal successors, (755), 474 states have internal predecessors, (755), 99 states have call successors, (99), 25 states have call predecessors, (99), 26 states have return successors, (96), 91 states have call predecessors, (96), 94 states have call successors, (96) [2021-12-22 11:18:32,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 950 transitions. [2021-12-22 11:18:32,529 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 950 transitions. Word has length 67 [2021-12-22 11:18:32,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:18:32,529 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 950 transitions. [2021-12-22 11:18:32,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 11:18:32,529 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 950 transitions. [2021-12-22 11:18:32,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-22 11:18:32,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:18:32,531 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] [2021-12-22 11:18:32,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 11:18:32,531 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:18:32,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:18:32,532 INFO L85 PathProgramCache]: Analyzing trace with hash -671596455, now seen corresponding path program 1 times [2021-12-22 11:18:32,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:18:32,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299916291] [2021-12-22 11:18:32,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:18:32,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:18:32,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:32,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 11:18:32,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:32,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:32,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:32,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:18:32,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:32,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 11:18:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:32,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:32,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:32,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:32,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:32,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 11:18:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:32,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:18:32,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:18:32,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299916291] [2021-12-22 11:18:32,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299916291] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:18:32,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:18:32,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:18:32,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871770339] [2021-12-22 11:18:32,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:18:32,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:18:32,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:18:32,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:18:32,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:18:32,756 INFO L87 Difference]: Start difference. First operand 577 states and 950 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 11:18:35,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:18:35,560 INFO L93 Difference]: Finished difference Result 1264 states and 2109 transitions. [2021-12-22 11:18:35,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 11:18:35,560 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2021-12-22 11:18:35,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:18:35,564 INFO L225 Difference]: With dead ends: 1264 [2021-12-22 11:18:35,564 INFO L226 Difference]: Without dead ends: 749 [2021-12-22 11:18:35,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:18:35,566 INFO L933 BasicCegarLoop]: 798 mSDtfsCounter, 1191 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 1965 mSolverCounterSat, 331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1275 SdHoareTripleChecker+Valid, 1780 SdHoareTripleChecker+Invalid, 2296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 1965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-22 11:18:35,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1275 Valid, 1780 Invalid, 2296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 1965 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-22 11:18:35,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-12-22 11:18:35,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 577. [2021-12-22 11:18:35,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 451 states have (on average 1.6629711751662972) internal successors, (750), 474 states have internal predecessors, (750), 99 states have call successors, (99), 25 states have call predecessors, (99), 26 states have return successors, (96), 91 states have call predecessors, (96), 94 states have call successors, (96) [2021-12-22 11:18:35,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 945 transitions. [2021-12-22 11:18:35,598 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 945 transitions. Word has length 67 [2021-12-22 11:18:35,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:18:35,599 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 945 transitions. [2021-12-22 11:18:35,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 11:18:35,599 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 945 transitions. [2021-12-22 11:18:35,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 11:18:35,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:18:35,600 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:18:35,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 11:18:35,600 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:18:35,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:18:35,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1455824306, now seen corresponding path program 1 times [2021-12-22 11:18:35,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:18:35,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798477613] [2021-12-22 11:18:35,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:18:35,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:18:35,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:35,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 11:18:35,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:35,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:35,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:18:35,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:35,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 11:18:35,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:35,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:35,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:35,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:35,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 11:18:35,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:35,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:18:35,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:18:35,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798477613] [2021-12-22 11:18:35,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798477613] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:18:35,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:18:35,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:18:35,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710387598] [2021-12-22 11:18:35,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:18:35,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:18:35,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:18:35,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:18:35,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:18:35,851 INFO L87 Difference]: Start difference. First operand 577 states and 945 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 11:18:39,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:18:39,201 INFO L93 Difference]: Finished difference Result 1264 states and 2104 transitions. [2021-12-22 11:18:39,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 11:18:39,202 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2021-12-22 11:18:39,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:18:39,205 INFO L225 Difference]: With dead ends: 1264 [2021-12-22 11:18:39,205 INFO L226 Difference]: Without dead ends: 749 [2021-12-22 11:18:39,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:18:39,207 INFO L933 BasicCegarLoop]: 801 mSDtfsCounter, 739 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 2123 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 1803 SdHoareTripleChecker+Invalid, 2296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 2123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:18:39,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [823 Valid, 1803 Invalid, 2296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 2123 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-22 11:18:39,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-12-22 11:18:39,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 577. [2021-12-22 11:18:39,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 451 states have (on average 1.6518847006651884) internal successors, (745), 474 states have internal predecessors, (745), 99 states have call successors, (99), 25 states have call predecessors, (99), 26 states have return successors, (96), 91 states have call predecessors, (96), 94 states have call successors, (96) [2021-12-22 11:18:39,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 940 transitions. [2021-12-22 11:18:39,242 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 940 transitions. Word has length 68 [2021-12-22 11:18:39,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:18:39,242 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 940 transitions. [2021-12-22 11:18:39,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 11:18:39,242 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 940 transitions. [2021-12-22 11:18:39,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 11:18:39,243 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:18:39,243 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:18:39,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 11:18:39,244 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:18:39,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:18:39,244 INFO L85 PathProgramCache]: Analyzing trace with hash 2054400190, now seen corresponding path program 1 times [2021-12-22 11:18:39,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:18:39,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310731205] [2021-12-22 11:18:39,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:18:39,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:18:39,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:39,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 11:18:39,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:39,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:39,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:39,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:18:39,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:39,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-22 11:18:39,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:39,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:39,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:39,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:39,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 11:18:39,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:39,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:18:39,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:18:39,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310731205] [2021-12-22 11:18:39,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310731205] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:18:39,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:18:39,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:18:39,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73239196] [2021-12-22 11:18:39,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:18:39,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:18:39,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:18:39,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:18:39,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:18:39,498 INFO L87 Difference]: Start difference. First operand 577 states and 940 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 11:18:42,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:18:42,445 INFO L93 Difference]: Finished difference Result 1264 states and 2099 transitions. [2021-12-22 11:18:42,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 11:18:42,445 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2021-12-22 11:18:42,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:18:42,448 INFO L225 Difference]: With dead ends: 1264 [2021-12-22 11:18:42,448 INFO L226 Difference]: Without dead ends: 749 [2021-12-22 11:18:42,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:18:42,451 INFO L933 BasicCegarLoop]: 800 mSDtfsCounter, 738 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 2100 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 1802 SdHoareTripleChecker+Invalid, 2269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 2100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-22 11:18:42,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [822 Valid, 1802 Invalid, 2269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 2100 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-22 11:18:42,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-12-22 11:18:42,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 577. [2021-12-22 11:18:42,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 451 states have (on average 1.6407982261640799) internal successors, (740), 474 states have internal predecessors, (740), 99 states have call successors, (99), 25 states have call predecessors, (99), 26 states have return successors, (96), 91 states have call predecessors, (96), 94 states have call successors, (96) [2021-12-22 11:18:42,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 935 transitions. [2021-12-22 11:18:42,486 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 935 transitions. Word has length 69 [2021-12-22 11:18:42,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:18:42,486 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 935 transitions. [2021-12-22 11:18:42,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 11:18:42,486 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 935 transitions. [2021-12-22 11:18:42,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-22 11:18:42,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:18:42,487 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:18:42,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 11:18:42,487 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:18:42,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:18:42,488 INFO L85 PathProgramCache]: Analyzing trace with hash -171355341, now seen corresponding path program 1 times [2021-12-22 11:18:42,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:18:42,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664189727] [2021-12-22 11:18:42,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:18:42,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:18:42,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:42,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 11:18:42,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:42,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:42,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:18:42,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:42,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-22 11:18:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:42,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:42,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:42,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:42,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 11:18:42,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:18:42,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:18:42,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664189727] [2021-12-22 11:18:42,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664189727] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:18:42,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:18:42,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 11:18:42,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800234845] [2021-12-22 11:18:42,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:18:42,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 11:18:42,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:18:42,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 11:18:42,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 11:18:42,716 INFO L87 Difference]: Start difference. First operand 577 states and 935 transitions. Second operand has 9 states, 8 states have (on average 6.875) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 11:18:46,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:18:46,247 INFO L93 Difference]: Finished difference Result 1256 states and 2076 transitions. [2021-12-22 11:18:46,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 11:18:46,247 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.875) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 70 [2021-12-22 11:18:46,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:18:46,251 INFO L225 Difference]: With dead ends: 1256 [2021-12-22 11:18:46,251 INFO L226 Difference]: Without dead ends: 756 [2021-12-22 11:18:46,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-12-22 11:18:46,253 INFO L933 BasicCegarLoop]: 833 mSDtfsCounter, 1201 mSDsluCounter, 2212 mSDsCounter, 0 mSdLazyCounter, 4006 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1286 SdHoareTripleChecker+Valid, 3045 SdHoareTripleChecker+Invalid, 4313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 4006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-22 11:18:46,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1286 Valid, 3045 Invalid, 4313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 4006 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-22 11:18:46,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-12-22 11:18:46,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 577. [2021-12-22 11:18:46,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 451 states have (on average 1.6385809312638582) internal successors, (739), 474 states have internal predecessors, (739), 99 states have call successors, (99), 25 states have call predecessors, (99), 26 states have return successors, (96), 91 states have call predecessors, (96), 94 states have call successors, (96) [2021-12-22 11:18:46,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 934 transitions. [2021-12-22 11:18:46,289 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 934 transitions. Word has length 70 [2021-12-22 11:18:46,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:18:46,289 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 934 transitions. [2021-12-22 11:18:46,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.875) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 11:18:46,290 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 934 transitions. [2021-12-22 11:18:46,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-22 11:18:46,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:18:46,291 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:18:46,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 11:18:46,291 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:18:46,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:18:46,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1253693971, now seen corresponding path program 1 times [2021-12-22 11:18:46,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:18:46,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462781663] [2021-12-22 11:18:46,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:18:46,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:18:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:46,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 11:18:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:46,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:46,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:18:46,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:46,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-22 11:18:46,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:46,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:46,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:46,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:46,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 11:18:46,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:46,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:18:46,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:18:46,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462781663] [2021-12-22 11:18:46,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462781663] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:18:46,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:18:46,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:18:46,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944166902] [2021-12-22 11:18:46,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:18:46,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:18:46,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:18:46,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:18:46,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:18:46,541 INFO L87 Difference]: Start difference. First operand 577 states and 934 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 11:18:48,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:18:48,924 INFO L93 Difference]: Finished difference Result 1264 states and 2091 transitions. [2021-12-22 11:18:48,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 11:18:48,925 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2021-12-22 11:18:48,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:18:48,928 INFO L225 Difference]: With dead ends: 1264 [2021-12-22 11:18:48,928 INFO L226 Difference]: Without dead ends: 749 [2021-12-22 11:18:48,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:18:48,930 INFO L933 BasicCegarLoop]: 794 mSDtfsCounter, 1200 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 1920 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1284 SdHoareTripleChecker+Valid, 1757 SdHoareTripleChecker+Invalid, 2238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 1920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:18:48,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1284 Valid, 1757 Invalid, 2238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 1920 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-22 11:18:48,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-12-22 11:18:48,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 577. [2021-12-22 11:18:48,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 451 states have (on average 1.6274944567627494) internal successors, (734), 474 states have internal predecessors, (734), 99 states have call successors, (99), 25 states have call predecessors, (99), 26 states have return successors, (96), 91 states have call predecessors, (96), 94 states have call successors, (96) [2021-12-22 11:18:48,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 929 transitions. [2021-12-22 11:18:48,998 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 929 transitions. Word has length 70 [2021-12-22 11:18:48,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:18:48,998 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 929 transitions. [2021-12-22 11:18:48,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 11:18:48,999 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 929 transitions. [2021-12-22 11:18:49,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-22 11:18:49,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:18:49,001 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:18:49,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 11:18:49,002 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:18:49,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:18:49,002 INFO L85 PathProgramCache]: Analyzing trace with hash -964545663, now seen corresponding path program 1 times [2021-12-22 11:18:49,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:18:49,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652576323] [2021-12-22 11:18:49,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:18:49,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:18:49,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:49,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 11:18:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:49,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:49,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:18:49,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:49,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-22 11:18:49,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:49,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:49,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:49,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:49,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:49,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 11:18:49,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:49,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:18:49,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:18:49,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652576323] [2021-12-22 11:18:49,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652576323] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:18:49,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:18:49,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 11:18:49,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710845305] [2021-12-22 11:18:49,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:18:49,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 11:18:49,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:18:49,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 11:18:49,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 11:18:49,271 INFO L87 Difference]: Start difference. First operand 577 states and 929 transitions. Second operand has 9 states, 8 states have (on average 7.0) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 11:18:52,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:18:52,367 INFO L93 Difference]: Finished difference Result 1277 states and 2101 transitions. [2021-12-22 11:18:52,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 11:18:52,368 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.0) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 71 [2021-12-22 11:18:52,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:18:52,371 INFO L225 Difference]: With dead ends: 1277 [2021-12-22 11:18:52,371 INFO L226 Difference]: Without dead ends: 774 [2021-12-22 11:18:52,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-12-22 11:18:52,373 INFO L933 BasicCegarLoop]: 821 mSDtfsCounter, 1208 mSDsluCounter, 2179 mSDsCounter, 0 mSdLazyCounter, 3935 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1293 SdHoareTripleChecker+Valid, 3000 SdHoareTripleChecker+Invalid, 4249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 3935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-22 11:18:52,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1293 Valid, 3000 Invalid, 4249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 3935 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-22 11:18:52,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-12-22 11:18:52,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 580. [2021-12-22 11:18:52,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 454 states have (on average 1.6211453744493391) internal successors, (736), 477 states have internal predecessors, (736), 99 states have call successors, (99), 25 states have call predecessors, (99), 26 states have return successors, (96), 91 states have call predecessors, (96), 94 states have call successors, (96) [2021-12-22 11:18:52,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 931 transitions. [2021-12-22 11:18:52,411 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 931 transitions. Word has length 71 [2021-12-22 11:18:52,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:18:52,411 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 931 transitions. [2021-12-22 11:18:52,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.0) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 11:18:52,411 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 931 transitions. [2021-12-22 11:18:52,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-22 11:18:52,412 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:18:52,412 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:18:52,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 11:18:52,413 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:18:52,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:18:52,413 INFO L85 PathProgramCache]: Analyzing trace with hash -41878237, now seen corresponding path program 1 times [2021-12-22 11:18:52,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:18:52,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644810606] [2021-12-22 11:18:52,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:18:52,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:18:52,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:52,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 11:18:52,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:52,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:52,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:52,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:18:52,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:52,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-22 11:18:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:52,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:52,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:52,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:52,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:52,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 11:18:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:52,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:18:52,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:18:52,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644810606] [2021-12-22 11:18:52,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644810606] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:18:52,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:18:52,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:18:52,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121263520] [2021-12-22 11:18:52,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:18:52,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:18:52,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:18:52,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:18:52,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:18:52,652 INFO L87 Difference]: Start difference. First operand 580 states and 931 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 11:18:54,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:18:54,772 INFO L93 Difference]: Finished difference Result 1273 states and 2092 transitions. [2021-12-22 11:18:54,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 11:18:54,775 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 71 [2021-12-22 11:18:54,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:18:54,779 INFO L225 Difference]: With dead ends: 1273 [2021-12-22 11:18:54,779 INFO L226 Difference]: Without dead ends: 755 [2021-12-22 11:18:54,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:18:54,781 INFO L933 BasicCegarLoop]: 802 mSDtfsCounter, 1194 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 1905 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1278 SdHoareTripleChecker+Valid, 1783 SdHoareTripleChecker+Invalid, 2212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 1905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-22 11:18:54,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1278 Valid, 1783 Invalid, 2212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 1905 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-22 11:18:54,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-12-22 11:18:54,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 580. [2021-12-22 11:18:54,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 454 states have (on average 1.6101321585903083) internal successors, (731), 477 states have internal predecessors, (731), 99 states have call successors, (99), 25 states have call predecessors, (99), 26 states have return successors, (96), 91 states have call predecessors, (96), 94 states have call successors, (96) [2021-12-22 11:18:54,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 926 transitions. [2021-12-22 11:18:54,820 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 926 transitions. Word has length 71 [2021-12-22 11:18:54,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:18:54,821 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 926 transitions. [2021-12-22 11:18:54,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 11:18:54,821 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 926 transitions. [2021-12-22 11:18:54,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-22 11:18:54,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:18:54,822 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:18:54,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 11:18:54,822 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:18:54,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:18:54,823 INFO L85 PathProgramCache]: Analyzing trace with hash -872008712, now seen corresponding path program 1 times [2021-12-22 11:18:54,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:18:54,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739780846] [2021-12-22 11:18:54,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:18:54,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:18:54,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:54,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 11:18:54,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:54,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:54,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:54,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:18:54,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:55,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-22 11:18:55,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:55,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:55,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:55,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:55,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:55,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 11:18:55,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:55,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:18:55,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:18:55,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739780846] [2021-12-22 11:18:55,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739780846] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:18:55,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:18:55,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 11:18:55,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716690761] [2021-12-22 11:18:55,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:18:55,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 11:18:55,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:18:55,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 11:18:55,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 11:18:55,074 INFO L87 Difference]: Start difference. First operand 580 states and 926 transitions. Second operand has 9 states, 8 states have (on average 7.125) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 11:18:58,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:18:58,954 INFO L93 Difference]: Finished difference Result 1283 states and 2098 transitions. [2021-12-22 11:18:58,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 11:18:58,955 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 72 [2021-12-22 11:18:58,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:18:58,958 INFO L225 Difference]: With dead ends: 1283 [2021-12-22 11:18:58,958 INFO L226 Difference]: Without dead ends: 780 [2021-12-22 11:18:58,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-12-22 11:18:58,966 INFO L933 BasicCegarLoop]: 824 mSDtfsCounter, 1197 mSDsluCounter, 2206 mSDsCounter, 0 mSdLazyCounter, 3918 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1282 SdHoareTripleChecker+Valid, 3030 SdHoareTripleChecker+Invalid, 4226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 3918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:18:58,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1282 Valid, 3030 Invalid, 4226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 3918 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-22 11:18:58,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-12-22 11:18:59,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 584. [2021-12-22 11:18:59,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 458 states have (on average 1.6026200873362446) internal successors, (734), 481 states have internal predecessors, (734), 99 states have call successors, (99), 25 states have call predecessors, (99), 26 states have return successors, (96), 91 states have call predecessors, (96), 94 states have call successors, (96) [2021-12-22 11:18:59,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 929 transitions. [2021-12-22 11:18:59,007 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 929 transitions. Word has length 72 [2021-12-22 11:18:59,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:18:59,007 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 929 transitions. [2021-12-22 11:18:59,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 11:18:59,007 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 929 transitions. [2021-12-22 11:18:59,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-22 11:18:59,009 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:18:59,009 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:18:59,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 11:18:59,010 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:18:59,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:18:59,010 INFO L85 PathProgramCache]: Analyzing trace with hash 501573080, now seen corresponding path program 1 times [2021-12-22 11:18:59,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:18:59,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830826503] [2021-12-22 11:18:59,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:18:59,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:18:59,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:59,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 11:18:59,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:59,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:59,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:18:59,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:59,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-22 11:18:59,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:59,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:59,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:59,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:18:59,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:59,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 11:18:59,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:18:59,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:18:59,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:18:59,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830826503] [2021-12-22 11:18:59,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830826503] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:18:59,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:18:59,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:18:59,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913112105] [2021-12-22 11:18:59,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:18:59,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:18:59,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:18:59,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:18:59,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:18:59,286 INFO L87 Difference]: Start difference. First operand 584 states and 929 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 11:19:02,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:19:02,032 INFO L93 Difference]: Finished difference Result 1321 states and 2137 transitions. [2021-12-22 11:19:02,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 11:19:02,033 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2021-12-22 11:19:02,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:19:02,036 INFO L225 Difference]: With dead ends: 1321 [2021-12-22 11:19:02,036 INFO L226 Difference]: Without dead ends: 735 [2021-12-22 11:19:02,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:19:02,038 INFO L933 BasicCegarLoop]: 818 mSDtfsCounter, 669 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 2062 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 1809 SdHoareTripleChecker+Invalid, 2208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 2062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-22 11:19:02,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 1809 Invalid, 2208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 2062 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-22 11:19:02,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2021-12-22 11:19:02,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 565. [2021-12-22 11:19:02,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 442 states have (on average 1.6108597285067874) internal successors, (712), 463 states have internal predecessors, (712), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 90 states have call predecessors, (93), 93 states have call successors, (93) [2021-12-22 11:19:02,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 903 transitions. [2021-12-22 11:19:02,077 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 903 transitions. Word has length 72 [2021-12-22 11:19:02,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:19:02,078 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 903 transitions. [2021-12-22 11:19:02,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 11:19:02,078 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 903 transitions. [2021-12-22 11:19:02,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-22 11:19:02,079 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:19:02,079 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:19:02,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 11:19:02,079 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:19:02,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:19:02,080 INFO L85 PathProgramCache]: Analyzing trace with hash 908269926, now seen corresponding path program 1 times [2021-12-22 11:19:02,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:19:02,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551082241] [2021-12-22 11:19:02,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:19:02,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:19:02,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:19:02,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 11:19:02,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:19:02,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:19:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:19:02,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:19:02,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:19:02,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-22 11:19:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:19:02,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:19:02,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:19:02,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:19:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:19:02,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 11:19:02,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:19:02,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:19:02,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:19:02,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551082241] [2021-12-22 11:19:02,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551082241] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:19:02,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:19:02,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 11:19:02,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164431600] [2021-12-22 11:19:02,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:19:02,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 11:19:02,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:19:02,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 11:19:02,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 11:19:02,335 INFO L87 Difference]: Start difference. First operand 565 states and 903 transitions. Second operand has 9 states, 8 states have (on average 7.25) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 11:19:06,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:19:06,468 INFO L93 Difference]: Finished difference Result 1256 states and 2052 transitions. [2021-12-22 11:19:06,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 11:19:06,469 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.25) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 73 [2021-12-22 11:19:06,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:19:06,489 INFO L225 Difference]: With dead ends: 1256 [2021-12-22 11:19:06,489 INFO L226 Difference]: Without dead ends: 756 [2021-12-22 11:19:06,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-12-22 11:19:06,491 INFO L933 BasicCegarLoop]: 801 mSDtfsCounter, 718 mSDsluCounter, 2144 mSDsCounter, 0 mSdLazyCounter, 4003 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 2945 SdHoareTripleChecker+Invalid, 4157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 4003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:19:06,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [802 Valid, 2945 Invalid, 4157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 4003 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-22 11:19:06,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-12-22 11:19:06,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 570. [2021-12-22 11:19:06,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 447 states have (on average 1.604026845637584) internal successors, (717), 468 states have internal predecessors, (717), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 90 states have call predecessors, (93), 93 states have call successors, (93) [2021-12-22 11:19:06,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 908 transitions. [2021-12-22 11:19:06,563 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 908 transitions. Word has length 73 [2021-12-22 11:19:06,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:19:06,563 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 908 transitions. [2021-12-22 11:19:06,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.25) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 11:19:06,563 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 908 transitions. [2021-12-22 11:19:06,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-22 11:19:06,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:19:06,567 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:19:06,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 11:19:06,568 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:19:06,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:19:06,568 INFO L85 PathProgramCache]: Analyzing trace with hash -789981491, now seen corresponding path program 1 times [2021-12-22 11:19:06,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:19:06,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137710273] [2021-12-22 11:19:06,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:19:06,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:19:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:19:06,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 11:19:06,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:19:06,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:19:06,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:19:06,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:19:06,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:19:06,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 11:19:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:19:06,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:19:06,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:19:06,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:19:06,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:19:06,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 11:19:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:19:06,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:19:06,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:19:06,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137710273] [2021-12-22 11:19:06,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137710273] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:19:06,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:19:06,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 11:19:06,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289878650] [2021-12-22 11:19:06,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:19:06,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 11:19:06,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:19:06,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 11:19:06,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-22 11:19:06,877 INFO L87 Difference]: Start difference. First operand 570 states and 908 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-22 11:19:13,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:19:13,701 INFO L93 Difference]: Finished difference Result 2072 states and 3474 transitions. [2021-12-22 11:19:13,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 11:19:13,701 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 74 [2021-12-22 11:19:13,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:19:13,710 INFO L225 Difference]: With dead ends: 2072 [2021-12-22 11:19:13,711 INFO L226 Difference]: Without dead ends: 1580 [2021-12-22 11:19:13,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-12-22 11:19:13,713 INFO L933 BasicCegarLoop]: 878 mSDtfsCounter, 4370 mSDsluCounter, 1805 mSDsCounter, 0 mSdLazyCounter, 5199 mSolverCounterSat, 1309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4460 SdHoareTripleChecker+Valid, 2683 SdHoareTripleChecker+Invalid, 6508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1309 IncrementalHoareTripleChecker+Valid, 5199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:19:13,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4460 Valid, 2683 Invalid, 6508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1309 Valid, 5199 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2021-12-22 11:19:13,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2021-12-22 11:19:13,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1088. [2021-12-22 11:19:13,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 853 states have (on average 1.6389214536928487) internal successors, (1398), 883 states have internal predecessors, (1398), 190 states have call successors, (190), 43 states have call predecessors, (190), 44 states have return successors, (192), 174 states have call predecessors, (192), 185 states have call successors, (192) [2021-12-22 11:19:13,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 1780 transitions. [2021-12-22 11:19:13,796 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 1780 transitions. Word has length 74 [2021-12-22 11:19:13,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:19:13,797 INFO L470 AbstractCegarLoop]: Abstraction has 1088 states and 1780 transitions. [2021-12-22 11:19:13,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-22 11:19:13,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 1780 transitions. [2021-12-22 11:19:13,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-22 11:19:13,799 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:19:13,800 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:19:13,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 11:19:13,800 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:19:13,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:19:13,800 INFO L85 PathProgramCache]: Analyzing trace with hash 120536424, now seen corresponding path program 1 times [2021-12-22 11:19:13,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:19:13,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807673987] [2021-12-22 11:19:13,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:19:13,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:19:13,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:19:13,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 11:19:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:19:13,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:19:13,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:19:13,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 11:19:13,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:19:14,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 11:19:14,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:19:14,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:19:14,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:19:14,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 11:19:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:19:14,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 11:19:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:19:14,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 11:19:14,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:19:14,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 11:19:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:19:14,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 11:19:14,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:19:14,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 11:19:14,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:19:14,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 11:19:14,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:19:14,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:19:14,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:19:14,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807673987] [2021-12-22 11:19:14,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807673987] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:19:14,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:19:14,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-22 11:19:14,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249220353] [2021-12-22 11:19:14,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:19:14,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 11:19:14,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:19:14,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 11:19:14,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-12-22 11:19:14,437 INFO L87 Difference]: Start difference. First operand 1088 states and 1780 transitions. Second operand has 18 states, 16 states have (on average 5.4375) internal successors, (87), 10 states have internal predecessors, (87), 5 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12)