./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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_spec3_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 10f09c8c5639b403d441157c6cb90f176690981c36f4af5417d0103735cbe364 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 12:58:16,099 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 12:58:16,101 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 12:58:16,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 12:58:16,167 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 12:58:16,169 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 12:58:16,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 12:58:16,173 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 12:58:16,175 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 12:58:16,179 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 12:58:16,180 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 12:58:16,181 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 12:58:16,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 12:58:16,183 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 12:58:16,185 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 12:58:16,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 12:58:16,188 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 12:58:16,189 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 12:58:16,191 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 12:58:16,196 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 12:58:16,197 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 12:58:16,198 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 12:58:16,199 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 12:58:16,200 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 12:58:16,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 12:58:16,206 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 12:58:16,207 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 12:58:16,208 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 12:58:16,208 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 12:58:16,209 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 12:58:16,209 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 12:58:16,210 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 12:58:16,211 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 12:58:16,212 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 12:58:16,213 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 12:58:16,214 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 12:58:16,214 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 12:58:16,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 12:58:16,215 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 12:58:16,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 12:58:16,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 12:58:16,218 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 12:58:16,244 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 12:58:16,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 12:58:16,244 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 12:58:16,245 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 12:58:16,245 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 12:58:16,245 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 12:58:16,246 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 12:58:16,246 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 12:58:16,246 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 12:58:16,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 12:58:16,246 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 12:58:16,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 12:58:16,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 12:58:16,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 12:58:16,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 12:58:16,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 12:58:16,247 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 12:58:16,247 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 12:58:16,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 12:58:16,247 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 12:58:16,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 12:58:16,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 12:58:16,248 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 12:58:16,248 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 12:58:16,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:58:16,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 12:58:16,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 12:58:16,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 12:58:16,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 12:58:16,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 12:58:16,249 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 12:58:16,249 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 12:58:16,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 12:58:16,249 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 12:58:16,249 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10f09c8c5639b403d441157c6cb90f176690981c36f4af5417d0103735cbe364 [2021-12-21 12:58:16,489 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 12:58:16,515 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 12:58:16,518 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 12:58:16,518 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 12:58:16,519 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 12:58:16,520 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c [2021-12-21 12:58:16,568 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2261ac55c/76ff0631f82e4478a3f71317c3c5407b/FLAGed334d7c1 [2021-12-21 12:58:17,065 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 12:58:17,065 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c [2021-12-21 12:58:17,098 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2261ac55c/76ff0631f82e4478a3f71317c3c5407b/FLAGed334d7c1 [2021-12-21 12:58:17,368 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2261ac55c/76ff0631f82e4478a3f71317c3c5407b [2021-12-21 12:58:17,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 12:58:17,373 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 12:58:17,376 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 12:58:17,376 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 12:58:17,379 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 12:58:17,380 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:58:17" (1/1) ... [2021-12-21 12:58:17,381 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@453ccdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:58:17, skipping insertion in model container [2021-12-21 12:58:17,381 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:58:17" (1/1) ... [2021-12-21 12:58:17,388 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 12:58:17,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 12:58:17,632 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_spec3_product22.cil.c[3205,3218] [2021-12-21 12:58:17,927 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:58:17,937 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 12:58:17,956 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_spec3_product22.cil.c[3205,3218] [2021-12-21 12:58:18,046 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:58:18,069 INFO L208 MainTranslator]: Completed translation [2021-12-21 12:58:18,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:58:18 WrapperNode [2021-12-21 12:58:18,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 12:58:18,070 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 12:58:18,071 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 12:58:18,071 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 12:58:18,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:58:18" (1/1) ... [2021-12-21 12:58:18,116 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:58:18" (1/1) ... [2021-12-21 12:58:18,180 INFO L137 Inliner]: procedures = 92, calls = 351, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 905 [2021-12-21 12:58:18,181 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 12:58:18,182 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 12:58:18,182 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 12:58:18,182 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 12:58:18,189 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:58:18" (1/1) ... [2021-12-21 12:58:18,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:58:18" (1/1) ... [2021-12-21 12:58:18,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:58:18" (1/1) ... [2021-12-21 12:58:18,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:58:18" (1/1) ... [2021-12-21 12:58:18,232 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:58:18" (1/1) ... [2021-12-21 12:58:18,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:58:18" (1/1) ... [2021-12-21 12:58:18,263 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:58:18" (1/1) ... [2021-12-21 12:58:18,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 12:58:18,271 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 12:58:18,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 12:58:18,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 12:58:18,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:58:18" (1/1) ... [2021-12-21 12:58:18,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:58:18,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:58:18,323 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) [2021-12-21 12:58:18,327 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 [2021-12-21 12:58:18,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 12:58:18,353 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-12-21 12:58:18,354 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-12-21 12:58:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-12-21 12:58:18,354 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-12-21 12:58:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-12-21 12:58:18,355 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-12-21 12:58:18,358 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-12-21 12:58:18,359 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-12-21 12:58:18,359 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-12-21 12:58:18,359 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-12-21 12:58:18,359 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-12-21 12:58:18,359 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-12-21 12:58:18,359 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-12-21 12:58:18,360 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-12-21 12:58:18,360 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-12-21 12:58:18,360 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-12-21 12:58:18,360 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-12-21 12:58:18,360 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-12-21 12:58:18,360 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-12-21 12:58:18,361 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-12-21 12:58:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-12-21 12:58:18,361 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-12-21 12:58:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-12-21 12:58:18,361 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-12-21 12:58:18,361 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-12-21 12:58:18,362 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-12-21 12:58:18,362 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-12-21 12:58:18,362 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-12-21 12:58:18,362 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-12-21 12:58:18,362 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-12-21 12:58:18,362 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-12-21 12:58:18,362 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-12-21 12:58:18,363 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-12-21 12:58:18,363 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-12-21 12:58:18,363 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-12-21 12:58:18,363 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-12-21 12:58:18,363 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-12-21 12:58:18,364 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-12-21 12:58:18,364 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-12-21 12:58:18,364 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-12-21 12:58:18,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 12:58:18,364 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-12-21 12:58:18,365 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-12-21 12:58:18,365 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-12-21 12:58:18,365 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-12-21 12:58:18,365 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-12-21 12:58:18,365 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-12-21 12:58:18,365 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-12-21 12:58:18,366 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-12-21 12:58:18,366 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2021-12-21 12:58:18,366 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2021-12-21 12:58:18,366 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-12-21 12:58:18,367 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-12-21 12:58:18,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 12:58:18,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 12:58:18,369 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-12-21 12:58:18,369 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-12-21 12:58:18,601 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 12:58:18,603 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 12:58:19,521 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 12:58:19,531 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 12:58:19,531 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 12:58:19,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:58:19 BoogieIcfgContainer [2021-12-21 12:58:19,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 12:58:19,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 12:58:19,535 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 12:58:19,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 12:58:19,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 12:58:17" (1/3) ... [2021-12-21 12:58:19,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe6ab24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:58:19, skipping insertion in model container [2021-12-21 12:58:19,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:58:18" (2/3) ... [2021-12-21 12:58:19,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe6ab24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:58:19, skipping insertion in model container [2021-12-21 12:58:19,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:58:19" (3/3) ... [2021-12-21 12:58:19,540 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product22.cil.c [2021-12-21 12:58:19,544 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 12:58:19,545 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 12:58:19,610 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 12:58:19,615 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 [2021-12-21 12:58:19,615 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 12:58:19,639 INFO L276 IsEmpty]: Start isEmpty. Operand has 596 states, 459 states have (on average 1.673202614379085) internal successors, (768), 479 states have internal predecessors, (768), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2021-12-21 12:58:19,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-21 12:58:19,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:58:19,653 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:58:19,654 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:58:19,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:58:19,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1321862527, now seen corresponding path program 1 times [2021-12-21 12:58:19,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:58:19,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572612723] [2021-12-21 12:58:19,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:58:19,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:58:19,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:20,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 12:58:20,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:20,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:58:20,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:20,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 12:58:20,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:20,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:58:20,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:20,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 12:58:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:20,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-21 12:58:20,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:20,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 12:58:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:20,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 12:58:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:20,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 12:58:20,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:58:20,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572612723] [2021-12-21 12:58:20,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572612723] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:58:20,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:58:20,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 12:58:20,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492282149] [2021-12-21 12:58:20,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:58:20,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 12:58:20,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:58:20,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 12:58:20,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:58:20,574 INFO L87 Difference]: Start difference. First operand has 596 states, 459 states have (on average 1.673202614379085) internal successors, (768), 479 states have internal predecessors, (768), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 9 states, 8 states have (on average 5.875) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 12:58:26,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:58:26,734 INFO L93 Difference]: Finished difference Result 1464 states and 2513 transitions. [2021-12-21 12:58:26,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 12:58:26,736 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.875) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 67 [2021-12-21 12:58:26,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:58:26,770 INFO L225 Difference]: With dead ends: 1464 [2021-12-21 12:58:26,770 INFO L226 Difference]: Without dead ends: 872 [2021-12-21 12:58:26,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-21 12:58:26,780 INFO L933 BasicCegarLoop]: 880 mSDtfsCounter, 1549 mSDsluCounter, 2442 mSDsCounter, 0 mSdLazyCounter, 4482 mSolverCounterSat, 459 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1658 SdHoareTripleChecker+Valid, 3322 SdHoareTripleChecker+Invalid, 4941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 459 IncrementalHoareTripleChecker+Valid, 4482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:58:26,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1658 Valid, 3322 Invalid, 4941 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [459 Valid, 4482 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-12-21 12:58:26,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-12-21 12:58:26,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 599. [2021-12-21 12:58:26,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 462 states have (on average 1.6645021645021645) internal successors, (769), 482 states have internal predecessors, (769), 109 states have call successors, (109), 27 states have call predecessors, (109), 27 states have return successors, (108), 103 states have call predecessors, (108), 106 states have call successors, (108) [2021-12-21 12:58:26,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 986 transitions. [2021-12-21 12:58:26,952 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 986 transitions. Word has length 67 [2021-12-21 12:58:26,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:58:26,952 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 986 transitions. [2021-12-21 12:58:26,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.875) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 12:58:26,953 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 986 transitions. [2021-12-21 12:58:26,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 12:58:26,956 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:58:26,957 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:58:26,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 12:58:26,957 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:58:26,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:58:26,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1068252313, now seen corresponding path program 1 times [2021-12-21 12:58:26,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:58:26,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619966200] [2021-12-21 12:58:26,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:58:26,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:58:26,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:27,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 12:58:27,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:27,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:58:27,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:27,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 12:58:27,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:27,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:58:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:27,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 12:58:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:27,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 12:58:27,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:27,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 12:58:27,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:27,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 12:58:27,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:27,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 12:58:27,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:58:27,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619966200] [2021-12-21 12:58:27,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619966200] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:58:27,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:58:27,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 12:58:27,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128801357] [2021-12-21 12:58:27,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:58:27,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 12:58:27,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:58:27,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 12:58:27,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:58:27,309 INFO L87 Difference]: Start difference. First operand 599 states and 986 transitions. Second operand has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 12:58:33,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:58:33,172 INFO L93 Difference]: Finished difference Result 1458 states and 2477 transitions. [2021-12-21 12:58:33,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 12:58:33,175 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 68 [2021-12-21 12:58:33,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:58:33,182 INFO L225 Difference]: With dead ends: 1458 [2021-12-21 12:58:33,182 INFO L226 Difference]: Without dead ends: 875 [2021-12-21 12:58:33,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-12-21 12:58:33,187 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 878 mSDsluCounter, 2423 mSDsCounter, 0 mSdLazyCounter, 4746 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 987 SdHoareTripleChecker+Valid, 3276 SdHoareTripleChecker+Invalid, 4977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 4746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-12-21 12:58:33,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [987 Valid, 3276 Invalid, 4977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 4746 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-12-21 12:58:33,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-12-21 12:58:33,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 599. [2021-12-21 12:58:33,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 462 states have (on average 1.6623376623376624) internal successors, (768), 482 states have internal predecessors, (768), 109 states have call successors, (109), 27 states have call predecessors, (109), 27 states have return successors, (108), 103 states have call predecessors, (108), 106 states have call successors, (108) [2021-12-21 12:58:33,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 985 transitions. [2021-12-21 12:58:33,276 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 985 transitions. Word has length 68 [2021-12-21 12:58:33,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:58:33,277 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 985 transitions. [2021-12-21 12:58:33,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 12:58:33,277 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 985 transitions. [2021-12-21 12:58:33,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 12:58:33,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:58:33,280 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:58:33,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 12:58:33,280 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:58:33,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:58:33,281 INFO L85 PathProgramCache]: Analyzing trace with hash -550225129, now seen corresponding path program 1 times [2021-12-21 12:58:33,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:58:33,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130495340] [2021-12-21 12:58:33,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:58:33,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:58:33,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:33,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 12:58:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:33,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:58:33,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:33,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 12:58:33,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:33,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:58:33,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:33,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 12:58:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:33,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 12:58:33,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:33,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 12:58:33,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:33,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 12:58:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:33,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 12:58:33,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:58:33,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130495340] [2021-12-21 12:58:33,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130495340] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:58:33,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:58:33,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 12:58:33,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827845012] [2021-12-21 12:58:33,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:58:33,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 12:58:33,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:58:33,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 12:58:33,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 12:58:33,604 INFO L87 Difference]: Start difference. First operand 599 states and 985 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, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 12:58:37,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:58:37,530 INFO L93 Difference]: Finished difference Result 1449 states and 2457 transitions. [2021-12-21 12:58:37,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 12:58:37,536 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, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 68 [2021-12-21 12:58:37,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:58:37,544 INFO L225 Difference]: With dead ends: 1449 [2021-12-21 12:58:37,544 INFO L226 Difference]: Without dead ends: 835 [2021-12-21 12:58:37,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 12:58:37,553 INFO L933 BasicCegarLoop]: 866 mSDtfsCounter, 1433 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 2186 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1541 SdHoareTripleChecker+Valid, 1944 SdHoareTripleChecker+Invalid, 2636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 2186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-21 12:58:37,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1541 Valid, 1944 Invalid, 2636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 2186 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-21 12:58:37,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-12-21 12:58:37,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 575. [2021-12-21 12:58:37,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 441 states have (on average 1.653061224489796) internal successors, (729), 459 states have internal predecessors, (729), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 102 states have call predecessors, (105), 105 states have call successors, (105) [2021-12-21 12:58:37,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 942 transitions. [2021-12-21 12:58:37,622 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 942 transitions. Word has length 68 [2021-12-21 12:58:37,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:58:37,623 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 942 transitions. [2021-12-21 12:58:37,623 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, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 12:58:37,624 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 942 transitions. [2021-12-21 12:58:37,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-21 12:58:37,625 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:58:37,625 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:58:37,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 12:58:37,626 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:58:37,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:58:37,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1908921867, now seen corresponding path program 1 times [2021-12-21 12:58:37,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:58:37,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132433353] [2021-12-21 12:58:37,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:58:37,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:58:37,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:37,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 12:58:37,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:37,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:58:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:37,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 12:58:37,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:37,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:58:37,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:37,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 12:58:37,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:37,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 12:58:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:37,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-21 12:58:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:37,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 12:58:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:37,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 12:58:37,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:58:37,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132433353] [2021-12-21 12:58:37,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132433353] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:58:37,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:58:37,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 12:58:37,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977938956] [2021-12-21 12:58:37,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:58:37,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 12:58:37,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:58:37,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 12:58:37,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:58:37,989 INFO L87 Difference]: Start difference. First operand 575 states and 942 transitions. Second operand has 9 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 12:58:42,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:58:42,447 INFO L93 Difference]: Finished difference Result 1412 states and 2388 transitions. [2021-12-21 12:58:42,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 12:58:42,447 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 69 [2021-12-21 12:58:42,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:58:42,453 INFO L225 Difference]: With dead ends: 1412 [2021-12-21 12:58:42,453 INFO L226 Difference]: Without dead ends: 829 [2021-12-21 12:58:42,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-21 12:58:42,457 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 1477 mSDsluCounter, 2357 mSDsCounter, 0 mSdLazyCounter, 4333 mSolverCounterSat, 452 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1585 SdHoareTripleChecker+Valid, 3198 SdHoareTripleChecker+Invalid, 4785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 452 IncrementalHoareTripleChecker+Valid, 4333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-21 12:58:42,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1585 Valid, 3198 Invalid, 4785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [452 Valid, 4333 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-12-21 12:58:42,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-12-21 12:58:42,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 569. [2021-12-21 12:58:42,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 435 states have (on average 1.645977011494253) internal successors, (716), 453 states have internal predecessors, (716), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 102 states have call predecessors, (105), 105 states have call successors, (105) [2021-12-21 12:58:42,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 929 transitions. [2021-12-21 12:58:42,530 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 929 transitions. Word has length 69 [2021-12-21 12:58:42,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:58:42,530 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 929 transitions. [2021-12-21 12:58:42,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 12:58:42,531 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 929 transitions. [2021-12-21 12:58:42,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-21 12:58:42,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:58:42,532 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:58:42,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 12:58:42,532 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:58:42,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:58:42,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1120655615, now seen corresponding path program 1 times [2021-12-21 12:58:42,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:58:42,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320227901] [2021-12-21 12:58:42,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:58:42,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:58:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:42,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 12:58:42,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:42,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:58:42,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:42,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 12:58:42,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:42,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:58:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:42,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 12:58:42,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:42,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-21 12:58:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:42,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 12:58:42,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:42,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 12:58:42,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:42,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 12:58:42,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:58:42,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320227901] [2021-12-21 12:58:42,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320227901] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:58:42,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:58:42,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 12:58:42,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289840790] [2021-12-21 12:58:42,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:58:42,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 12:58:42,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:58:42,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 12:58:42,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:58:42,845 INFO L87 Difference]: Start difference. First operand 569 states and 929 transitions. Second operand has 9 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 12:58:47,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:58:47,509 INFO L93 Difference]: Finished difference Result 1382 states and 2337 transitions. [2021-12-21 12:58:47,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 12:58:47,510 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 70 [2021-12-21 12:58:47,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:58:47,515 INFO L225 Difference]: With dead ends: 1382 [2021-12-21 12:58:47,515 INFO L226 Difference]: Without dead ends: 829 [2021-12-21 12:58:47,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-21 12:58:47,519 INFO L933 BasicCegarLoop]: 803 mSDtfsCounter, 826 mSDsluCounter, 2358 mSDsCounter, 0 mSdLazyCounter, 4434 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 3161 SdHoareTripleChecker+Invalid, 4659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 4434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:58:47,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [934 Valid, 3161 Invalid, 4659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 4434 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-12-21 12:58:47,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-12-21 12:58:47,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 569. [2021-12-21 12:58:47,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 435 states have (on average 1.6436781609195403) internal successors, (715), 453 states have internal predecessors, (715), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 102 states have call predecessors, (105), 105 states have call successors, (105) [2021-12-21 12:58:47,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 928 transitions. [2021-12-21 12:58:47,570 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 928 transitions. Word has length 70 [2021-12-21 12:58:47,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:58:47,571 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 928 transitions. [2021-12-21 12:58:47,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 12:58:47,571 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 928 transitions. [2021-12-21 12:58:47,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-21 12:58:47,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:58:47,572 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:58:47,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 12:58:47,573 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:58:47,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:58:47,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1841165080, now seen corresponding path program 1 times [2021-12-21 12:58:47,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:58:47,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242374162] [2021-12-21 12:58:47,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:58:47,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:58:47,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:47,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 12:58:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:47,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:58:47,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:47,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 12:58:47,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:47,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:58:47,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:47,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 12:58:47,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:47,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-21 12:58:47,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:47,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 12:58:47,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:47,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 12:58:47,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:47,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 12:58:47,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:58:47,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242374162] [2021-12-21 12:58:47,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242374162] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:58:47,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:58:47,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 12:58:47,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320998422] [2021-12-21 12:58:47,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:58:47,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 12:58:47,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:58:47,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 12:58:47,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:58:47,881 INFO L87 Difference]: Start difference. First operand 569 states and 928 transitions. Second operand has 9 states, 8 states have (on average 6.375) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 12:58:52,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:58:52,772 INFO L93 Difference]: Finished difference Result 1400 states and 2357 transitions. [2021-12-21 12:58:52,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 12:58:52,773 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.375) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 71 [2021-12-21 12:58:52,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:58:52,778 INFO L225 Difference]: With dead ends: 1400 [2021-12-21 12:58:52,778 INFO L226 Difference]: Without dead ends: 823 [2021-12-21 12:58:52,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-21 12:58:52,782 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 855 mSDsluCounter, 2459 mSDsCounter, 0 mSdLazyCounter, 4438 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 963 SdHoareTripleChecker+Valid, 3300 SdHoareTripleChecker+Invalid, 4659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 4438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-21 12:58:52,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [963 Valid, 3300 Invalid, 4659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 4438 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-12-21 12:58:52,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-12-21 12:58:52,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 563. [2021-12-21 12:58:52,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 429 states have (on average 1.6363636363636365) internal successors, (702), 447 states have internal predecessors, (702), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 102 states have call predecessors, (105), 105 states have call successors, (105) [2021-12-21 12:58:52,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 915 transitions. [2021-12-21 12:58:52,835 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 915 transitions. Word has length 71 [2021-12-21 12:58:52,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:58:52,837 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 915 transitions. [2021-12-21 12:58:52,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.375) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 12:58:52,837 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 915 transitions. [2021-12-21 12:58:52,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-21 12:58:52,838 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:58:52,838 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:58:52,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 12:58:52,839 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:58:52,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:58:52,839 INFO L85 PathProgramCache]: Analyzing trace with hash 745123459, now seen corresponding path program 1 times [2021-12-21 12:58:52,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:58:52,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236634664] [2021-12-21 12:58:52,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:58:52,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:58:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:52,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 12:58:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:53,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:58:53,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:53,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 12:58:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:53,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:58:53,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:53,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 12:58:53,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:53,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 12:58:53,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:53,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 12:58:53,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:53,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-21 12:58:53,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:53,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 12:58:53,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:58:53,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236634664] [2021-12-21 12:58:53,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236634664] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:58:53,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:58:53,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 12:58:53,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177692379] [2021-12-21 12:58:53,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:58:53,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 12:58:53,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:58:53,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 12:58:53,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:58:53,161 INFO L87 Difference]: Start difference. First operand 563 states and 915 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, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 12:58:57,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:58:57,791 INFO L93 Difference]: Finished difference Result 1370 states and 2308 transitions. [2021-12-21 12:58:57,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 12:58:57,792 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, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 72 [2021-12-21 12:58:57,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:58:57,796 INFO L225 Difference]: With dead ends: 1370 [2021-12-21 12:58:57,797 INFO L226 Difference]: Without dead ends: 823 [2021-12-21 12:58:57,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-21 12:58:57,800 INFO L933 BasicCegarLoop]: 799 mSDtfsCounter, 811 mSDsluCounter, 2389 mSDsCounter, 0 mSdLazyCounter, 4322 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 3188 SdHoareTripleChecker+Invalid, 4550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 4322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-12-21 12:58:57,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [919 Valid, 3188 Invalid, 4550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 4322 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-12-21 12:58:57,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-12-21 12:58:57,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 563. [2021-12-21 12:58:57,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 429 states have (on average 1.634032634032634) internal successors, (701), 447 states have internal predecessors, (701), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 102 states have call predecessors, (105), 105 states have call successors, (105) [2021-12-21 12:58:57,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 914 transitions. [2021-12-21 12:58:57,854 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 914 transitions. Word has length 72 [2021-12-21 12:58:57,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:58:57,855 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 914 transitions. [2021-12-21 12:58:57,855 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, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 12:58:57,855 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 914 transitions. [2021-12-21 12:58:57,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-21 12:58:57,856 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:58:57,856 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:58:57,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 12:58:57,856 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:58:57,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:58:57,857 INFO L85 PathProgramCache]: Analyzing trace with hash -155039253, now seen corresponding path program 1 times [2021-12-21 12:58:57,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:58:57,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808050859] [2021-12-21 12:58:57,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:58:57,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:58:57,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:58,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 12:58:58,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:58,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:58:58,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:58,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 12:58:58,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:58,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:58:58,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:58,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 12:58:58,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:58,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 12:58:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:58,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-21 12:58:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:58,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 12:58:58,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:58:58,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 12:58:58,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:58:58,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808050859] [2021-12-21 12:58:58,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808050859] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:58:58,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:58:58,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 12:58:58,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909450420] [2021-12-21 12:58:58,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:58:58,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 12:58:58,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:58:58,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 12:58:58,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:58:58,154 INFO L87 Difference]: Start difference. First operand 563 states and 914 transitions. Second operand has 9 states, 8 states have (on average 6.625) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 12:59:02,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:59:02,763 INFO L93 Difference]: Finished difference Result 1391 states and 2330 transitions. [2021-12-21 12:59:02,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 12:59:02,764 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.625) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 73 [2021-12-21 12:59:02,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:59:02,768 INFO L225 Difference]: With dead ends: 1391 [2021-12-21 12:59:02,768 INFO L226 Difference]: Without dead ends: 844 [2021-12-21 12:59:02,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-12-21 12:59:02,771 INFO L933 BasicCegarLoop]: 804 mSDtfsCounter, 1400 mSDsluCounter, 2377 mSDsCounter, 0 mSdLazyCounter, 4200 mSolverCounterSat, 461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1508 SdHoareTripleChecker+Valid, 3181 SdHoareTripleChecker+Invalid, 4661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 461 IncrementalHoareTripleChecker+Valid, 4200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-21 12:59:02,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1508 Valid, 3181 Invalid, 4661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [461 Valid, 4200 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-12-21 12:59:02,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-12-21 12:59:02,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 568. [2021-12-21 12:59:02,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 434 states have (on average 1.6267281105990783) internal successors, (706), 452 states have internal predecessors, (706), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 102 states have call predecessors, (105), 105 states have call successors, (105) [2021-12-21 12:59:02,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 919 transitions. [2021-12-21 12:59:02,827 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 919 transitions. Word has length 73 [2021-12-21 12:59:02,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:59:02,828 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 919 transitions. [2021-12-21 12:59:02,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.625) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 12:59:02,828 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 919 transitions. [2021-12-21 12:59:02,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-21 12:59:02,829 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:59:02,829 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:59:02,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 12:59:02,829 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:59:02,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:59:02,830 INFO L85 PathProgramCache]: Analyzing trace with hash -954856244, now seen corresponding path program 1 times [2021-12-21 12:59:02,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:59:02,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202843643] [2021-12-21 12:59:02,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:59:02,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:59:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:59:02,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 12:59:02,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:59:03,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:59:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:59:03,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 12:59:03,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:59:03,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:59:03,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:59:03,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 12:59:03,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:59:03,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 12:59:03,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:59:03,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-21 12:59:03,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:59:03,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 12:59:03,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:59:03,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 12:59:03,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:59:03,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202843643] [2021-12-21 12:59:03,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202843643] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:59:03,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:59:03,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 12:59:03,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900667664] [2021-12-21 12:59:03,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:59:03,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 12:59:03,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:59:03,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 12:59:03,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:59:03,146 INFO L87 Difference]: Start difference. First operand 568 states and 919 transitions. Second operand has 9 states, 8 states have (on average 6.625) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 12:59:07,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:59:07,585 INFO L93 Difference]: Finished difference Result 1393 states and 2329 transitions. [2021-12-21 12:59:07,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 12:59:07,589 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.625) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 73 [2021-12-21 12:59:07,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:59:07,593 INFO L225 Difference]: With dead ends: 1393 [2021-12-21 12:59:07,593 INFO L226 Difference]: Without dead ends: 817 [2021-12-21 12:59:07,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-21 12:59:07,596 INFO L933 BasicCegarLoop]: 818 mSDtfsCounter, 1414 mSDsluCounter, 2373 mSDsCounter, 0 mSdLazyCounter, 4200 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1522 SdHoareTripleChecker+Valid, 3191 SdHoareTripleChecker+Invalid, 4648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 4200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-21 12:59:07,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1522 Valid, 3191 Invalid, 4648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 4200 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-12-21 12:59:07,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-12-21 12:59:07,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 557. [2021-12-21 12:59:07,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 423 states have (on average 1.624113475177305) internal successors, (687), 441 states have internal predecessors, (687), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 102 states have call predecessors, (105), 105 states have call successors, (105) [2021-12-21 12:59:07,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 900 transitions. [2021-12-21 12:59:07,653 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 900 transitions. Word has length 73 [2021-12-21 12:59:07,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:59:07,653 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 900 transitions. [2021-12-21 12:59:07,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.625) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 12:59:07,654 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 900 transitions. [2021-12-21 12:59:07,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-21 12:59:07,654 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:59:07,655 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:59:07,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 12:59:07,655 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:59:07,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:59:07,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1686237128, now seen corresponding path program 1 times [2021-12-21 12:59:07,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:59:07,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837553377] [2021-12-21 12:59:07,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:59:07,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:59:07,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:59:07,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 12:59:07,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:59:07,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:59:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:59:07,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 12:59:07,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:59:07,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:59:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:59:07,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 12:59:07,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:59:07,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-21 12:59:07,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:59:07,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 12:59:07,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:59:07,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-21 12:59:07,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:59:07,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 12:59:07,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:59:07,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837553377] [2021-12-21 12:59:07,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837553377] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:59:07,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:59:07,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 12:59:07,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389714409] [2021-12-21 12:59:07,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:59:07,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 12:59:07,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:59:07,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 12:59:07,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:59:07,971 INFO L87 Difference]: Start difference. First operand 557 states and 900 transitions. Second operand has 9 states, 8 states have (on average 6.75) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 12:59:12,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:59:12,715 INFO L93 Difference]: Finished difference Result 1370 states and 2289 transitions. [2021-12-21 12:59:12,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 12:59:12,716 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 74 [2021-12-21 12:59:12,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:59:12,720 INFO L225 Difference]: With dead ends: 1370 [2021-12-21 12:59:12,720 INFO L226 Difference]: Without dead ends: 829 [2021-12-21 12:59:12,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-12-21 12:59:12,723 INFO L933 BasicCegarLoop]: 780 mSDtfsCounter, 774 mSDsluCounter, 2367 mSDsCounter, 0 mSdLazyCounter, 4272 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 3147 SdHoareTripleChecker+Invalid, 4499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 4272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:59:12,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [882 Valid, 3147 Invalid, 4499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 4272 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-12-21 12:59:12,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-12-21 12:59:12,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 563. [2021-12-21 12:59:12,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 429 states have (on average 1.6153846153846154) internal successors, (693), 447 states have internal predecessors, (693), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 102 states have call predecessors, (105), 105 states have call successors, (105) [2021-12-21 12:59:12,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 906 transitions. [2021-12-21 12:59:12,778 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 906 transitions. Word has length 74 [2021-12-21 12:59:12,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:59:12,779 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 906 transitions. [2021-12-21 12:59:12,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 12:59:12,779 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 906 transitions. [2021-12-21 12:59:12,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-21 12:59:12,780 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:59:12,780 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:59:12,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 12:59:12,781 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:59:12,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:59:12,781 INFO L85 PathProgramCache]: Analyzing trace with hash -159130038, now seen corresponding path program 1 times [2021-12-21 12:59:12,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:59:12,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358631097] [2021-12-21 12:59:12,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:59:12,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:59:12,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:59:12,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 12:59:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:59:12,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:59:12,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:59:12,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 12:59:13,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:59:13,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 12:59:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:59:13,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 12:59:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:59:13,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-21 12:59:13,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:59:13,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 12:59:13,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:59:13,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-21 12:59:13,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:59:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 12:59:13,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:59:13,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358631097] [2021-12-21 12:59:13,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358631097] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:59:13,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:59:13,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 12:59:13,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022784031] [2021-12-21 12:59:13,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:59:13,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 12:59:13,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:59:13,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 12:59:13,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:59:13,055 INFO L87 Difference]: Start difference. First operand 563 states and 906 transitions. Second operand has 9 states, 8 states have (on average 6.75) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8)